eChapters

English name : All Spice
Botanical name : Pimento dioica (L.) Merr.
Family : Myrtaceae
Chromosome number : 2n = 22
Centre of origin : West Indies
All spice of commerce is the dry unripe fruits of tree Pimenta dioica (L.) Merr. (Syn P. officinalis Lindi). Allspice, also known as pimento, derives its name from the early misconception of Spanish exporters who mistook the berries for pepper. This led to names such as Jamaica pepper in English and Nalkenpfeffer in German, though it is now officially referred to as “pimenta.” The term “allspice” reflects the belief that the spice combines cloves, nutmeg, black pepper, and cinnamon flavours and aromas. It is available in both whole and ground forms.
The composition of ground allspice berries includes 8.8% moisture, 6.0%protein, 6.6% fat (ether extract), 21.6% fibre, and 52.8% carbohydrates, with 4.2% total ash. Additionally, it contains 0.8% calcium, 0.1% phosphorus, 0.08% sodium, 1.1% potassium, 7.5 mg of iron per 100 g, and vitamins such as 39.2 mg of vitamin C, 0.1 mg of thiamine, 0.06 mg of riboflavin, 2.9 mg of niacin, and 1445 IU of vitamin A. The calorific value is approximately 380 calories per 100 g. Its distinctive aroma comes from the essential oil content (3.3–4.5%) concentrated in the pericarp. The berries also contain tannic acid (over 8%), contributing to their astringency, along with soft resin, fixed oil (5.8%), crude starch (20%), proteins (5.8%), and trace amounts of alkaloids.

English name : Curry leaf
Botanical name : Murraya koenigii (Linn.) Sprengel
Family : Rutaceae
Chromosome number : 2n = 18
Centre of origin : India
Curry leaves come from the aromatic, often deciduous herb or small tree Murraya koenigii (Linn) Sprengel, which belongs to the Rutaceae family. They are widely used in cooking to enhance the flavour of dishes, although their nutritional value is often ignored, as they are typically discarded after being used as a spice.
The fresh weight composition of curry leaves includes 66.3% moisture, 6.1% protein, 1.0% fat (ether extract), 16.0% carbohydrate, 6.4% fibre, 3.1% iron, 4.2% mineral matter, 810 mg of calcium, 600 mg of phosphorus, 12,600 IU of carotene (vitamin A), 2.3 mg of nicotinic acid, and 40 mg of vitamin C per 100 grams. While the leaves lack thiamine and riboflavin, they are a rich vitamin A and calcium source. However, their nutritional availability is reduced due to the high oxalic acid content (1.35%, with 1.15% being soluble oxalates).

English name : Celery
Botanical name : Apium graveolens L.
Family : Apiaceae
Chromosome number : 2n = 22
Centre of origin : Italy
Celery is botanically known as Apium graveolens L. and is commercially recognized by different names in India, like Karnauli, Ajmod, or garden celery. There are four horticultural varieties of celery. Apium graveolens var. dulce (Miller) Pers. is cultivated for its edible leaves and stalks, commonly used in salads, appetizers, and soups. Another variety, var. rapaceum (Mill) Gaudich, known as celeriac, comprises dark green leaves grown for its root tubers, which are cooked and consumed. The other two varieties are var. secalinum and smallage.
In India, the main variety cultivated is var. dulce. Celery is commercially available in various forms, including seeds, flakes, as a vegetable, celery seed oil, and oleoresin. Celery seeds have specific quality characteristics viz. moisture content ranges from 5-11%, volatile oil content from 1.5-3% (average 2.4%), non-volatile ether extract from 5.8-14.2% (average 9.4%), cold water extract from 5.9-12.6% (average 8.4%), total ash from 6.9-11.0% (average 8.8%), and ash insoluble in acid from 0.5-4.0% (average 2.5%).

English name : Thyme
Botanical name : Thymus vulgaris L.
Family : Lamiaceae
Chromosome number : 2n = 30
Centre of origin : Mediterranean region
Thyme (Thymus vulgaris Linn.), also known as ‘Common Thyme’ or ‘Garden Thyme’, belongs to the Lamiaceae family and has been a vital herb spice for centuries. The name “thyme” originates from the Greek word meaning “to fumigate” or “thumus,” which symbolizes courage. The herb contains various nutrients, including moisture (7.1%), protein (6.8%), fat (4.6%), crude fibre (24.3%), carbohydrates (44.0%), mineral matter (13.2%), calcium (2.1%), phosphorus (0.20%), iron (0.14%), sodium (0.08%), potassium (0.9%), vitamin A (175 IU), vitamin B1 (51 mg), vitamin B2 (0.4 mg), vitamin C (12.0 mg), niacin (4.9 mg), and a calorific value of 340 calories. Upon distillation, thyme yields Red Thyme oil. Additionally, the herb contains triterpinoid saponins, flavones, ursolic acid (1.5% in tops), caffeic acid, bitter compounds, tannins, and resins. Other wild thyme species, such as T. serpyllum L., T. zygus L. (white thyme), and T. satureioides Coss and Bal, also produce volatile oils. The major compounds in T. zygus and T. serpyllum include thymol, linalool, and linalyl acetate, while T. satureioides contains thymol, borneol, and a-terpineol.

English name : Rosemary
Botanical name : Rosemarinus officinalis L.
Family : Lamiaceae
Chromosome number : 2n = 24
Centre of origin : Mediterranean region
Rosemary, botanically classified as Rosmarinus officinalis L. of the family Lamiaceae (Labiatae), is widely recognized as a culinary herb. When subjected to steam distillation, the leaves and flowering tops yield an essential oil. The name “rosemary” is believed to be associated with the Virgin Mary, as reflected in one of its Spanish names, romero, meaning “pilgrim’s flower.” This association further underscores its connection to the Virgin Mary. Dried rosemary leaves comprise approximately 5.7% moisture, 4.5% protein, 17.4% fat, 19% crude fibre, 47.4% carbohydrates, and 6.0% ash. Additionally, they are rich in minerals and vitamins, containing 1.5% calcium, 0.70% phosphorus, 0.03% iron, 0.004% sodium, 1.0% potassium, 175 IU of vitamin A per 100 g, 0.51 mg of vitamin B, 0.04 mg of another B-vitamin, 1.0 mg of niacin, and 61.3 mg of vitamin C per 100 g, with a caloric value of 440 calories per 100 g.

Scientific name: Piper betle L.
Family: Piperaceae
The betel vine, scientifically known as Piper betle L., is a perennial climber native to Southeast Asia, including India. It belongs to the Piperaceae family. The betel vine has been an integral part of Indian culture, tradition, and medicine for thousands of years.
In Hinduism, the betel vine is considered a sacred plant, often offered to gods and goddesses. The leaves are used in various rituals, including weddings and pujas (prayer ceremonies). In Indian tradition, betel leaves are also offered as a mark of respect and hospitality to guests.
Betel leaves have been used in Ayurvedic medicine for their numerous health benefits. They are rich in antioxidants, anti-inflammatory compounds, and essential oils. The leaves are used to treat various ailments, including digestive issues, respiratory problems, skin conditions, and oral health issues.
In addition to their medicinal properties, betel leaves are also used as a mouth and breathe freshener. The leaves are chewed with betel nuts (areca nuts) and lime, a practice known as "paan" in India. The betel vine is a versatile plant with significant cultural, medicinal, and economic importance in India and other parts of Southeast Asia.

Scientific name: Cinchona spp.
Family: Rubiaceae
Cinchona, a genus of flowering plants, comprises approximately 65 species. Several species, including Cinchona succirubra, C. officinalis, and C. ledgeriana, are cultivated for their bark, which contains quinine and other antimalarial compounds.
Origin and distribution
Native to the highlands of South America, Cinchona was introduced to India's Nilgiris in 1859. It is currently cultivated in the Anamalai and Nilgiris hills of Tamil Nadu, as well as in Darjeeling, West Bengal.
Botany
Cinchona is a majestic evergreen plant that can grow to varying heights, ranging from 5 to 15 meters. Its trunk is covered with a smooth, greyish-brown bark that peels off in thin layers. The branches are slender, pubescent, and arranged in a whorled pattern. The leaves of the Cinchona plant are simple, oppositely arranged, and decussate. They are elliptical or lanceolate in shape, with a pointed apex and a rounded base. The leaves are 10-20 cm long, 2-5 cm wide, and have a leathery texture. The upper surface is dark green, glossy, and glabrous, while the lower surface is pale green, pubescent, and has prominent midribs.

Scientific name: Dioscorea alata L.
Family: Dioscoreaceae
Dioscorea alata, commonly known as water yam or purple yam, is a species of yam belonging to the family Dioscoreaceae. Native to Southeast Asia, this tropical and subtropical crop has gained popularity worldwide for its edible, nutrient-rich tubers. The plant's unique characteristic is its purple-colored tubers, which owe their distinct hue to anthocyanins, powerful antioxidants that provide numerous health benefits. With its exceptional nutritional profile, Dioscorea alata has become an attractive alternative to other tubers, offering a valuable addition to various culinary dishes.
Origin and distribution
Dioscorea alata, a yam species, exhibits a widespread geographical distribution, with its origin tracing back to Southeast Asia. Phylogeographical studies indicate that the species has undergone extensive dispersal and cultivation, resulting in its presence globally in tropical and subtropical regions. Notably, D. alata has become naturalized in the southeastern United States, the Caribbean, and parts of Africa, where it is widely cultivated for its edible tubers.

Scientific name: Plantago ovata Forsk.
Family: Plantaginaceae
Isabgol, or Psyllium husk or Blond psyllium, belongs to the family Plantaginaceae. This medicinal herb has been used for centuries in India, particularly for its seed's therapeutic properties. The name "Isabgol" originates from Persian, with "Isab" meaning horse and "Gol" meaning ear, describing the seed's distinctive shape. Isabgol is cultivated globally and is valued for its medicinal and industrial applications. The seed's medicinal properties make it an effective remedy for constipation and digestive issues. Additionally, Isabgol is used in the food industry to produce various products, such as candies, biscuits, and ice cream.
Origin and distribution
Isabgol (Plantago ovata) is native to the Mediterranean region, West Asia, and parts of Pakistan, including Sindh and Sutleg. Its distribution also extends to the Canary Islands, Southern Spain, the Middle East, North Africa, and North- Western Asia.
Botany
It is 10-15 cm tall short-stemmed annual herb. Flowers in terminal spikes; fruit is a capsule. Theflowers are white in colour and minute. It is highly selfpollinated. The capsule is ovate, 8 mmlong, releasing the smooth, dull, ovate seeds. The seeds are covered with a translucent membrane, known as the husk. The husked seeds are dark red and hard.

Scientific name: Piper longum L.
Family: Piperaceae
Piper longum, commonly known as long pepper, is a flowering vine native to the tropical regions of India, Southeast Asia, and Sri Lanka. It has been used for centuries in traditional medicine, particularly in Ayurveda and Unani systems, for its numerous health benefits. The plant is characterized by its slender stems, heart-shaped leaves, and spikes of small flowers. The fruit of the plant, a small, elongated berry, is the part commonly used for medicinal and culinary purposes.
Origin and distribution
The plant is native to South and Southeast Asia. The wild type of Piper longum is mainly found in Kerala, Assam, West Bengal, Nepal, Uttar Pradesh, Andhra Pradesh, and the North East region. The plant is cultivated in various parts of India, including Bengal, Assam, Maharashtra, Tamil Nadu, Orissa, and Meghalaya. Piper longum naturally occurs in the central Himalayas to Assam, Khasi and Mikir hills, and the evergreen forests of Western Ghats from Konkan to Kanyakumari and Nicobar Island.

Scientific name: Catharanthus roseus (L.) G.Don
Family: Apocyanaceae
Catharanthus roseus (Vinca rosea)is a perennial flowering plant in the family Apocyanaceae. It is commonly known as Cape periwinkle, Madagascar periwinkle or graveyard plant etc. Periwinkle is an extensively investigatedmedicinal plant after the discovery of powerful anticancer alkaloids such as Vinblastine and Vincristine, in its leaves more than 50 years ago. These alkaloids have revolutionized  cancer treatment and saved countless lives worldwide. Today, Catharanthus roseus remains a vital source of inspirationfor cancer research and drug development.
Origin and distribution
Periwinkle is native and endemic to Madagascar. However, it is now cultivated and grown in many tropical and subtropical regions worldwide, including the southern United States, West Indies, and several states in India, such as Karnataka, Tamil Nadu, and Gujarat. Unfortunately, the plant is endangered in its natural habitat due to habitat destruction and burn and slash agriculture.
Botany
Periwinkle is a perennial herb belonging to the Apocynaceae family. It is a popular ornamental plant, often grown in gardens for its attractive pink and white flowers that bloom throughout the year. The plant has a spreading habit, with flexible, long branches that bear simple, opposite leaves. These leaves are elliptical to ovate in shape, measuring 2.5-5 cm in length and 1-2 cm in width, with a glossy, dark green appearance and a pointed tip.

Scientific name: Rauvolfia serpentina (L.) Benth. ex Kurz
Family: Apocyanaceae
Rauvolfia serpentina, also spelled as Rauwolfia, is indeed a vital plant in traditional Indian medicine. It has been used in folk medicine for centuries to treat conditions like snake and insect bites, malaria, dysentery, and more. This plant is deeply rooted in Indian culture, mentioned in Hindu manuscripts as far back as 1000 BCE. It's also known by various names, including Indian snake root, devil pepper, serpentine wood, sarpagandha, and chandrika. Botanically, it belongs to the family Apocynaceae, with the genus Rauvolfia comprising 74 species. Unfortunately, Rauvolfia serpentina is listed as endangered due to over-exploitation and habitat loss, emphasizing the need for conservation and sustainable use to ensure its availability for future generations.
Origin and distribution
The distribution of R. serpentina is very wide, is occurrence is sporadic. The plant commonly grows scattered and close to each other. They are widely distributed in the Sub Himalayan tract from Himachal Pradesh to Sikkim and Bhutan, Eastern and Western Ghats, in some parts of central India. Beyond India the plant is distributed in Bangladesh, Malaysia, Thailand, Nepal, Sri Lanka, Indonesia, and Burma.

Scientific name: Acorus calamus L.
Family: Acoraceae
Acorus calamus, commonly known as Sweet Flag, is a medicinal plant with a long history of therapeutic use. Various names in Hindi, Sanskrit, and other languages know it. The plant has a distinctive lemon-like scent in its leaves and a pleasant aroma in its roots. Sweet Flag is highly valued for its essential oil used in the perfume industry. Unfortunately, the plant is now classified as an endangered species due to over-exploitation.
Origin and distribution Acorus calamus, commonly known as Sweet Flag, is native to northern latitude countries worldwide. It is widely dispersed across the USA and can be found growing wild or cultivated in India and Sri Lanka up to 1800 meters.
Botany
Sweet Flag is a perennial, semi-aquatic herb that exhibits a distinctive morphology. The rhizome, which serves as the plant's stem, is cylindrical in shape, measuring 19-25 mm in diameter and 10 cm in length. The exterior of the rhizome is light brown in color, while the interior is white and spongy. The rhizome is also highly aromatic, emitting a sweet, pungent scent when bruised. It is a creeping, highly branched structure that allows the plant to spread rapidly.

Scientific name: Ammi majus L.
Family: Apiaceae
Ammi majus L., a member of the Apiaceae family, is a valuable medicinal plant. Its botanical name is derived from the Greek words "Ammi" and "majus," meaning "sand" and "larger," respectively. This plant has been used for centuries in traditional medicine, particularly for its antispasmodic and anti-inflammatory properties.
Origin and distribution
Ammi majus L. is native to Egypt and is now cultivated in various parts of the world, including India, Europe, and North Africa. It has been introduced to many countries for its medicinal and ornamental value.
Botany
This herbaceous annual plant grows up to a height of 0.75 to 1.15 meters. It has a round, erect, and solid stem with a tap root system. The large leaves are 5-8 cm long, alternate, and light green, with a compound, pinnately divided, and lanceolate shape.
The inflorescence is an umbel, axillary, and terminal in position, bearing white flowers. The calyx tube is adnate to bracts, with 5 teeth. The petals are 5 in number, epigynous, distinct, and bifid. There are 5 stamens, epigynous, and alternate with petals. The ovary is inferior, 2-celled, disk epigynous, 2-lobed, with a solitary ovule in each cell. The style has 2 branches, with a minute and capitulate stigma.

Scientific name: Cymbopogon spp.
Family: Poaceae
Citronella was first introduced in India in 1959 from Indonesia, specifically from Java Island, which is why it is also known as Java citronella. This fragrant grass, belonging to the Poaceae family, yields essential oils when steam-distilled. The resulting citronella oil (Cymbopogon winterianus Jowitt) is widely used globally in various industries, including flavoring, soap, perfumery, and cosmetics. There are two main types of citronella: Ceylon and Java. The species C. nardus yields Ceylon-type oil, while C. winterianus yields Java-type oil. Java-type oil
is preferred over Ceylon-type oil due to its higher citronellal content, ranging from 30-38% compared to 20-25% in Ceylon-type oil.
Origin and distribution
Citronella originated in tropical Asia, specifically in Indonesia (Java Island) and Sri Lanka. Today, it is cultivated in many tropical and subtropical regions worldwide. In India, citronella is grown in several states, including Maharashtra, Uttar Pradesh, and Madhya Pradesh. It is also cultivated in other parts of Southeast Asia, such as Malaysia, the Philippines, and Thailand. Citronella is also grown in Africa, Central and South America, and the Pacific Islands, where the warm and humid climate provides ideal conditions for its growth.

Scientific name: Ocimum sanctum L.
Family: Lamiaceae
The ‘Sacred basil’ or ‘Holy basil’, Ocimum sanctum Linn. a biennial shrub belonging to the family Lamiaceae, is commonly cultivated in gardens. The Hindus of India worship the species and is traditionally grown in courtyards and temples. The aromatic plants belonging to genus Ocimum is popularly known by the name Basil. Basil was derived from Greek word “Basilica” which means royal plant. Among the Ocimum genus Ocimum basilicum is variously known as Sweet basil, French basil or Common basil. Ocimum sanctum is known as sacred basil or Holy basil which is a very sacred plant according to Hindu belief.
Origin and distribution
Ocimum Sanctum has broad distributions, covering the entire Indian subcontinent, ascending up to 1,800 m in the Himalayas and as far as the Andaman and Nicobar Islands. This plant occupies a wide range of habitats.
Botany
Botanically, Ocimum sanctum is an erect, herbaceous, and softly hairy plant that exhibits extensive branching. It typically grows to a height of 30-75 cm. The leaves are entire, serrate, and pubescent on both sides, while the flowers are characterized by their purplish or crimson hue, arranged in racemes. The fruits of Ocimum sanctum are sub-globose or broadly ellipsoid in shape, slightly compressed, nearly smooth, and exhibit a pale brown or reddish coloration with small black markings. It is a biennial or triennial shrub.

Scientific name: Lavandula angustifolia Mill.
Family: Lamiaceae
Lavender is a small genus of perennial aromatic herbs, semi-shrubs, or shrubs. It comprises approximately 28 species, with three species being extensively utilized for extracting essential oils:
True Lavender (Lavandula angustifolia): One of the most important essential oils used in the perfumery industry.
Spike Lavender (Lavandula latifolia): Yields inferior oil, less fragrant than true lavender and rosemary.
Lavandin (Lavandula hybrida): is a hybrid of true lavender and spike lavender, possessing characteristics of both parents. The essential oil extracted from Lavandin combines the sweet, floral fragrance of true lavender with the camphoraceous harshness of spike lavender. Although Lavandin oil has a unique fragrance profile, it is considered inferior to true lavender oil in terms of quality and finesse.
Origin and distribution
Lavender originates from the Mediterranean basin, typically thriving in rocky, calcareous areas. Its distribution spans North Africa, the Mediterranean, Europe, and Western India. Lavender has been cultivated since ancient times, with the Greeks and Romans being notable cultivators. The name "lavender" is derived from the Latin verb "lavare," meaning "to wash" or "to bathe."

Scientific name: Mentha spp.
Family: Lamiaceae
Mint belongs to the genus Mentha and is part of the Lamiaceae family, including popular herbs like basil, sage, and rosemary. There are several commercially grown mint species, each with unique chemical compositions, aromas, and uses.
Origin and distribution
Mint originated in the Mediterranean region and spread globally through natural and artificial means. Japanese mint is widely cultivated in Brazil, Paraguay, China, and India, while peppermint is grown in the USA, Morocco, Argentina, and Australia.
Botany
Japanese mint (Mentha arvensis) is a perennial, ascending herb that typically grows to a height of 60-80 cm, with the potential to reach up to 100 cm under favorable conditions. This herb is primarily propagated through its stolons, which enable it to spread and establish new plants. The leaves of Japanese mint are lanceolate-oblong in shape, featuring sharp teeth along their edges, and are supported by small petioles approximately 5 mm in length. The leaf lamina itself measures between 5 to 15 cm in length. Notably, the lower surface of the leaves is densely covered with hairy growths of glandular trichomes. The plant produces an abundance of small, purplish flowers in axillary and terminal verticillasters. These flowers are characterized by a corolla measuring 4-5 mm in length and a calyx that is narrowly deltoid and acuminate, measuring 2-3 mm. Japanese mint is sterile and does not produce seeds, relying solely on vegetative means of propagation.

Scientific name: Chrysanthemum cinerariaefolium L.
Family: Asteraceae
Pyrethrum (Chrysanthemum cinerariaefolium L.) is a hearty perennial flower that thrives in interesting and challenging environments. It has been used for centuries as a natural insecticide. The pyrethrum daisy was first documented 2000 years ago, during the Chou Dynasty in China.
Origin and distribution
Pyrethrum originated in China over 2000 years ago and was later introduced to East Africa, where it is currently grown in Kenya, Uganda, Tanzania, and Rwanda. It is also grown in Tasmania, Australia, Ecuador, and Papua New Guinea.
Botany
Pyrethrum is a white flower-headed, tufted perennial herbaceous plant. It possesses deeply lobed leaves and has a numerous and fibrous shallow root system that extends up to 30 cm. The plant features numerous fairly rigid stems that grow up to 50-80 cm in height, accompanied by blue-green, deeply divided leaves. Notably, these leaves are covered on both sides by a dense, woolly material.

Scientific name: Pseudarthria viscida L.
Family: Fabaceae
Pseudarthira viscida is an important plant in the Indian conventional system of medicine. It is known as salaparni in Sanskrit, belongs to the Fabaceae family, and is distributed in peninsular India and Srilanka. It is among the dasamoola, a combination of roots of ten medicinal plants. It is used as a medicine for the treatment of various diseases due to its versatile nature and it is also an essential ingredient of various ayurvedic formulations such as Surasadi Thailam,Sudarsanasava, Balajeerakadhi Kashayam,Brihatyadi Kashayam, Surasadi Kashayam,Brahmarasayana. Pseudarthria viscida is a herbal plant that exhibits pharmacological andtherapeutic properties. It is widely used in ayurveda alone or poly-herbal formulations to treat various diseases. The whole plant is known for antipyretic, analgesic, antioxidant and anti-fungal effects. It is commercially and extensively used to treat tuberculosis, hemorrhoids, blood disorders, tumors, diabetes, hyperthermia and bronchitis. The root is the economic part, which alleviates tridoshas, namely vata, pitta, andcoupha. The roots are with thermogenic, astringent, emollient, digestive, febrifuge andcardiotonic. Majorchemical compounds present in the roots aregallic acid, caffeic acid, rutin, quercetin, ferulicacid and phenolic compounds and also reported with proteins, flavonoids and leucopelargonidin. Roots are
well known for anthelmintic,anti-diuretic and anti-inflammatory properties. Decoction of the root used against heart diseases, rheumatism, asthma and piles. Pseudarthria viscida is becoming extinct from nature, and its number has been reduced drastically. Due to the limited availability of Pseudarthria viscida, which is substituted by other leguminous trifoliate plant species such as Desmodiumpulchellum and Uraria rufescens. There for, it is put in the red list category and the plant requires proper management practices to exploit its therapeutic potential in the treatment of various diseases.

Scientific name: Centella asiatica (L) Urban
Fmily: Apiaceae
The plant Centella asiatica belongs to the family Apiaceae. C. asiatica widely distributed throughout tropical and subtropical regions of the world. Commonly known as Gotu Kola, Indian pennywort or Asiatic pennywort. It has a long history of utilization in Chinese and Ayurvedic traditional medicines since centuries. Leaves are yellowish-green color, thin and edible. The plant
grows horizontally through its stolones which roots in underground. C. asiatica shows a wide range of biological activities such as anti-inflammatory, anti-ulcer, wound healing, anti-psoriatic, anti-convulsant, hepato protective, immuno-stimulant, anti-diabetic, sedative, anti-bacterial, anti-viral, antitumor, cardio protective and anti-oxidant activities.
Origin and distribution
C. asiatica widely distributed throughout tropical and subtropical regions of the world. C. asiatica is widely found in Sree Lanka, India, Indonesi, Malaeysia and China. It is especially common in the Indian sub continent. It is also present in Eastern and Northern parts of Australia. It may also found in Tropical parts of Africa and Madagascar. C. asiatica has been introduced and is now cultivated or found in Thailand, Cambodia, Vietnam, The Philippines, Myanmar, and Brazil. Beyond Madagascar it is found in parts of Southern and Central Africa. The plant grows in countries such as Hawaii and Fiji. It is also found in Southern states like Florida.

Abstract
Agriculture is still main grindstone for the population in India. Even though the insistence for the agriculture produces expanding constantly due to the rising in the population, Due to this, Indian farmers are not getting assisted in this context. The rate of drop out from agriculture is enhancing from generation to generation. One of the main apprehensions is agriculture which is not becoming effective for the farmers. Thus to preserve their lives many farmers are quitting agriculture and migrating to urban areas ultimately. This will leads to deterioration in supply of food grains to integrated nation. At the same time, the capacity of land is declining due to reduction in the fertility of the land over years. The input cost for agriculture is also increasing steadily. The situation arrived where we have to enhance the income levels of the farmers along with attaining the sustainability in the agricultural practices. Therefore, a shift from agriculture to agribusiness is an important pathway to revitalize Indian agriculture and to make more attractive and profitable venture.
Keywords: Agriculture, Agripreneurship, Sustainability, Entrepreneurship, etc.

Abstract
Sustainable entrepreneurship integrates social and environmental goals with economic viability, aiming to enhance human well-being while preserving ecological systems for future generations. Unlike conventional entrepreneurship, which prioritizes profit, sustainable entrepreneurship focuses on maintaining resources and bolstering socio-ecological systems through innovative, risk-taking ventures. It combines elements of ecopreneurship, social entrepreneurship, and institutional entrepreneurship to address environmental degradation and social inequities, creating value for diverse stakeholders. By realizing sustainability innovations, such enterprises meet unmet demands for environmental and social  improvements, contributing to equitable resource distribution and long-term societal benefits. The growing emphasis on sustainable development as a public policy priority underscores the need for entrepreneurship that supports ecological and social processes, fostering inclusive growth and resilience.
Keywords: Sustainable Entrepreneurship, Ecopreneurship, Social Entrepreneurship, Sustainable Development, Socio-Ecological Systems, Innovation, Resource Preservation, Stakeholder Engagement, Environmental Gains, Social Equity

A. Beejamruit
Beejamrit is an organic solution primarily used in seed treatment to promote better germination, protect against soil-borne diseases, and enhance plant growth. It is part of traditional agricultural practices in India and is commonly used in organic farming. he preparation of Beejamrit involves simple, locally available ingredients like cow dung, cow urine, lime, water, and a handful of
soil (often sourced from under a banyan tree). The process is straightforward: cow dung is soaked in water overnight, and the mixture is later combined with lime, cow urine, and soil to create the final solution. This solution is then used to coat seeds before planting, providing them with a protective layer that boosts germination and shields them from pathogens. Beejamrit is valued for its low cost and quick preparation compared to chemical treatments. It is rich in beneficial microorganisms that help improve soil health and support plant growth.
The preparation of Beejamrit, a traditional organic solution used for seed treatment, is simple and involves locally available ingredients. Here’s the  process:

The low productivity in guava because of traditional planting distance (6-7 m apart) with no canopy management practices. Guava under traditional and high density planting system, though it gives high yield during initial stage but as the tree advances in age light interception and aeration decreases inside the canopy due to shading and overcrowding, resulting low yields and poor quality. In order to develop efficient canopy architecture for HDP and traditional planting system, the ICAR-CISH has standardized training system and canopy management with objective to have sustained high yield and quality of guava.
Guava bears flower on current shoots produced on mature wood laterally or terminally. In general flowers are produced in the leaf axils in 1 or 2-3 in cluster. The crop load depend on number of new shoots, hence more new shoots resulting more fruiting surface area.
High Density Planting System
Accommodation of more plants per unit area is known as high density planting system. Since guava respond well to pruning and fruiting starts 40-50 days after pruning and more new shoots emerged on which more flowers and fruits appears, thus yield increased. For successful HDP suitable canopy shape and its management is prerequisite. Guava is usually planted 6-7 m distance accommodating 277 to 204 plants per hectare the yield vary 35-80 kg/tree with yield per hectare 15-12 t/ha. In traditional planting density usually fruiting takes place on high on the tree.

The aromatic plants are the valuable source for flavours, fragrances and other pharmaceutical products. The aromatic plants possess odoriferous and volatile substances, which occur in the form of essential oils, gum exudate, balsam and oleo-resin. The chemical nature of these aromatic substances may be due to a variety of complex chemical compounds. Natural essential oils comprising a complex mixture of aroma chemicals, which are difficult to reconstitute in the chemical industry, fetch very high prices. India has a long perfumery tradition that dates back to over 5,000 years in Indus Valley Civilization. In the excavation of Harrappa and Mohanjodaro, a water distillation still and receiver have been recorded, whose shape resemble to the deg and bhabka currently used by attaries (traditional perfumers) of Kannauj in India (Gupta and Chadha, 1995).
Aromatic plants are very important part of agriculture and have been grown in India for their fragrance and therapeutic use from ages. Presently, several aromatic plants are in use for medication have come from our ancestors, inhabiting in different countries. The recent advances made in chemical and instrumentation technology led to the identification and isolation of principal chemical compounds diversely used in medicines, food, cosmetics, toiletries, bouquets, aerosols, paints, varnishes, insecticides etc (Arya et al., 2021). However, the perfumery and allied industries consume much larger amount of the natural fragrant material. Many of the aromatic plants are valued for naturally occurring essential oils and the bulk of the produce finds use in perfumery and the food flavouring industries.

India is endowed with rich treasure of aromatic plants of great industrial importance in its forests, wetlands and marine areas. India is among the 12 mega biodiversity centers of the world, which accounts for about 8 percent of the total biodiversity recorded so far. Despite of having only 2.4 percent land area of the world, India has been divided into 16 Agroclimatic zones having about 49000 plant species. Out of which 15000 species belong to medicinal and aromatic plants group. Out of these, 1500 medicinal and aromatic plants have identified, but only 500 species are commonly used in the preparation of ISM&H drugs. Besides, more than 150 plant species have been found endangered and are at the verge of extinction.
Indian export of raw drugs based on medicinal and aromatic plants has grown steadily at 25 % over the last few years. WHO has forecasted that the global market for herbal products is expected to be around US$ 5 trillion by 2050, and further emphasized the need for revitalization, and expansion of traditional system of medicines. But merely 150 medicinal and aromatic plants species are being reported to be used commercially on fairly large scale (Chandel et al.,1996).
The global market in plant based pharmaceuticals in growing rapidly day-byday leading to a sizeable increase in demand for herbal plants. Even today, 80-90% of naturally growing wild populations have remained the main source of raw materials used for drugs in India without applying scientific management techniques essential to sustain the growth and preserve useful properties essential to determine the efficacy of the medicines. The wild source is now being depleted and exploited without scientific harvesting techniques/ practices.

There has been increasing demand of plant based raw materials for manufacturing pharmaceuticals, flavours, fragrances, cosmetics & other related products. Among these, ginsenosides, taxol, artemisinin
etc. are some of the biomolecules used in making drugs with great demand in the market. Aromatic plants are an integral component of research and development in the pharmaceutical and aroma industry.
In India, the annual growth in this sector is around 15-20 percent. There are approximately 7500 plant species of medicinal value, including aromatic plants having significant scope for phyto-pharmaceuticals and cosmetic & perfumery industry. Because raw materials are still harvested from wild growing populations in the forests, introduction of these plants in agriculture is need of the hour for further research efforts to bring them into commercial cultivation as these plants also promise large benefits to farmers, if brought under cultivation. This can be achieved by screening germplasm from natural flora to select suitable genotypes for sustainable use in the prevalent cropping system.
Plant tissue culture technically known as micro-propagation and broadly defined as a collection of methods used to grow large number of plants in vitro (in an aseptic and closely controlled environment). This technique is effective because almost all plant cells are totipotent, meaning thereby that each cell possesses the genetic information and cellular machinery to generate an entire organism. Micro-propagation, therefore, can be used to produce large number of plants, which are genetically identical to parent plants as well as to one another (Raveen et al., 1999).

Essential oil obtained from aromatic plants is a mixture of several naturally arising biochemical compounds that occur in some plants which have scented flowers, leaves, bark, seeds, stem wood, or roots. As per the
biochemical view, the active ingredients of essential oils are tranquil of oxygenated hydrocarbons and several other types of hydrocarbons which may be clustered conferring to their biochemical structure into esters, terpenes, aldehydes, alcohols, phenols and ketones etc. Carbon is considered as the basic element for all kinds of essential oils. Majority of essential oil compounds are made of C, H, O, N and S atoms. The atom of these different kind of elements are joined to each other to make the essentia oil molecules. These biomolecules are made up of five carbon atoms is named isoprene. All essential oil compounds mainly consist terpenic compounds having two or more than two isoprene units (C5). These Isoprene units (C5) are generally attached to each other in head to tail fashion, hence ‘isoprene rule’ is followed. When two units of isoprene (10 C) are joint together, they form what is known as monoterpenes. Likewise, when three, four, five, six and eight units are united, they are called sesquiterpenes, diterpenes, sesterterpenes, triterpenes and tetraterpenes, respectively. These terpenes are colourless liquids and are generally lighter than water. They are highly refractive and insoluble in water. The ‘terpene’ term is usually restricted to hydrocarbon but on addition of oxygen in it, these are called terpenoids. These include menthol, cirtral, linalool, geraniol, carotenes, camphor, thymol, menthone etc. (Maheshwari, 1995).
Generally, the essential oil is extracted from aromatic plants through various methods but for production of essential oil for aromatherapy, the only suitable methods are those that are non-toxic. This contains cold pressing, distillation, and, in some cases, extraction by using the non-toxic solvents.

Duration: 60-75 minutes
Objective: Equip participants with the skills to work effectively in diverse teams, fostering trust, clear roles, and constructive conflict resolution to achieve shared goals.
Why It Matters
Teamwork drives innovation, productivity, and workplace morale. Effective collaboration leverages diverse strengths, but poor teamwork can lead to miscommunication, duplicated efforts, or resentment. For example, a team without clear roles might miss deadlines, or unresolved conflicts can erode trust. This module empowers participants to build cohesive, high-performingn teams.
Learning Outcomes: By the end of this module, participants will:
1. Understand the principles of trust, role clarity, and conflict resolution in teams.
2. Practice collaborative decision-making and communication in team settings.
3. Develop strategies to strengthen team dynamics and resolve conflicts constructively.

Duration: 60-75 minutes
Objective: Develop creative and analytical skills to identify, analyze, and resolve workplace challenges effectively.
Why It Matters
Problem-solving is critical for overcoming obstacles, improving processes, and driving innovation. Effective problem-solvers think critically and act decisively, while poor problem-solving leads to delays or ineffective solutions. For example, misdiagnosing a client complaint can escalate issues, while a structured approach resolves it quickly. This module equips participants with practical tools to tackle problems confidently.
Learning Outcomes: By the end of this module, participants will:
1. Understand a structured process for problem-solving (define, generate, evaluate, implement).
2. Practice root cause analysis and brainstorming techniques.
3. Apply problem-solving strategies to real-world scenarios.

Introduction
Chamomile is generally known as German or Hungarian chamomile. Its herb is commonly used for both medicinal as well as aromatic purposes. It was introduced in India during late fifties by Regional Research Laboratory, Jammu (Handa et. al., 1957) and subsequently in different parts of India. It was successfully grown over saline soils at CIMAP, Lucknow and later at several other locations. It was also introduced at YSPUH&F at Solan (H.P.) under AICRP on M&APs and several parameters were identified for better utilization of inputs for higher production of herb. Its flowers also contain an essential oil with multiple uses.
Origin
It is native to Europe and mainly cultivated in the regions of northern, central and eastern European countries, Mediterranean, N. Africa, United States, Germany, France, Hungary and Russia. It is found grown in wild state in
eastern and southern Europe, West Asia and North Africa.

Introduction
It was first introduced from Java by National Botanical Research Institute (NBRI), Lucknow in 1959. Later on Regional Research Laboratory (RRL) of CIMAP, Bangalore started research work from 1961. Presently, it is cultivated in Karnataka, Assam, Maharashtra, TN, WB, AP, Southern Gujarat and UP. Citronella oil is produced from two species, viz., Cymbopogon winterianus (Java type) and C. nardus (Ceylon type). About 300-350 tonnes of oil is produced annually in India, as against 7000 tonnes in the world.
Origin
It is reported to be originated from Borneo, Java and Sumatra
Uses
Despite production of synthetic isolates in large scale, there is still a widespread preference for natural citronella oil because of its unique olfactory and stable technical properties, which are vital in blending perfumes and compounding industrially important essences. The oil is mainly used in perfumery, soaps, detergents, industrial polishes, cleaning compounds, mosquito repellent products and other industrial products.

Introduction
Davana (Artemisia pallens Wall.) is one of the important aromatic herb found abundantly in humid habitats in the plains all over India. It is popularly known as sage brush, worm wood and mug word. The davana (Artemisia pallens) is a small to medium height; annual and herbaceous aromatic plant. This herb is erect, and grow up to 60 cm height. Its leaves are highly divided and bears small size yellow coloured flower. Its leaves and stem found protected with greyish-white tomentum. The leaves are lobed, alternate, and petiolate.
Origin & Distribution
It is native to southern India, where it is traditionally grown in Karnataka, Maharashtra, Kerala, T.N., and A.P, growing widely in tropical to subtropical
plains as Rabi season crop. It also found growing in wild form in the Himalayan region in the Simla, Kashmir valley, and Nainital hills. It is widely used by Ayurvedic healers to balance the three energies. It is an erect growing
plant up to 60 cm height. It does not grow wild, but grown as a garden plant in South India. It is a crop of irrigated conditions; and do well when planted in November-December, yielding significantly higher oil yield in comparison to crop planting in July-August. The crop should be harvested 2-3 inches above ground level during bright sunny days at 50 percent flowering stage to have high oil content and oil yield.

Duration: 60-75 minutes
Objective: Enhance self-awareness, empathy, and relationship management to build stronger workplace connections and leadership skills.
Why It Matters
Emotional intelligence drives effective collaboration, leadership, and conflict resolution. High EQ creates positive workplace cultures, while low EQ can lead to misunderstandings or disengagement. For example, an empathetic response to a stressed colleague builds trust, while a dismissive one erodes it. This module equips participants to manage emotions and relationships effectively.
Learning Outcomes: By the end of this module, participants will:
1. Understand the four components of EQ: self-awareness, self-regulation, empathy, relationship management.
2. Practice empathetic listening and emotional regulation.
3. Develop strategies to strengthen interpersonal relationships.
Key Concepts
1. Self-Awareness
Recognize and understand your emotions.
• Identify Triggers: Notice what sparks strong emotions (e.g., tight deadlines cause stress).
• Reflect Regularly: Journal or pause to assess your emotional state.

Introduction
Geranium is also known as cranesbill, scented geranium/rose geranium. It is adaptable over a wide range of soil conditions and drought tolerant. Being perennial aromatic herb, it is cultivated for rose scented essential oil extracted from leaves and tender shoots. The oil thus obtained is also called pelargonium oil or rose-geranium oil. The oil is of varied colour from colourless to pale yellowbrown or greenish. The genus Pelargonium belongs to the family Geraniaceae.
Origin
Geranium is native to sub-tropical southern Africa, and the most popular of bedding and green-house plants. The genus Pelargonium consists of about 600 species, which are annual, biennial, and perennials found in Cape province of South Africa.
Botany
The cultivated geraniums may belong to herbaceous to woody with thick fleshy leaves of round to lobed shape and deep cut. The flowers are present in terminal clusters with varying colours from white to pink, deep red and violet. Cultivated species are hybrids, having double flowers of mixed colours.

Introduction
Genus Curcuma belongs to the Zingiberaceae family, and containing of about 122 species. These are grown profusely in Asian countries including, India, China, and Southeast Asia, Northern Australia and New Guinea. Like ginger, it is also the popular herb of this family for the utilization of its underground rhizomatous stem by human beings. Botanically it is named as Curcuma longa L. Its bright yellow spicy powder is got from the dried rhizome is termed turmeric powder, which is the final product of this herb. In addition to this curcumin bio-active compound is also extracted by cursing rhizomes of turmeric. The plants turmeric are considered to be a hybrid and sterile leaving vegetative propagation from rhizome as the single mode of propagation. India is recognized as the power house of turmeric production. Along with us, our neighbours in South East and Eastern region, including Malaysia, Thailand, Bangladesh, Cambodia, Philippines, Indonesia and even China are considered major producers.
Floral Biology
All species of Curcuma genus have almost alike flowering spikes that mainly originate from the topmost region of the rhizome (pseudo-stem) or sometimes on a separate stem directly from the rhizome. These two stems differ onlyin the inner portion of rhizome, which differ in colour, i.e., creamy, white, orange, yellow, bluish-green, blue, and sometime black also. The rhizomes exhibit commercial value as a medicine as well as food spice. Curcuma longa L. (Syn. Curcuma domestica Val.), is the common turmeric. It is the top ranking herb based on its economic potential among all the members of this genus and cultivated in India about 150,000 hectares.

Introduction
Patchouli is known as patcholi in Hindi, patche tene in annada, patchapan or patcha in Marathi, patchilla in Malayalam, pacchilai in Tamil. It is a hardy perennial herb well-adjusted against the hot and humid climatic situations. Patchouli is an aromatic herb of immense importance due to presence of essential oil extracted from shade dried leaves. It possessed a powerful sweetness and spicy fragrance. Patchouli has tremendous business potential owning to its unique fragrance properties in the global market. Its oil easily blends with other essential oils giving strong base as fixative properties in preventing evaporation and promoting tenacity. Worldwide, Indonesia is considered as the chief patchouli oil producer.
Origin
Pogostemon cablin Benth. is natural to Philippines but also found growing wild in many countries of South Asian region. The word ‘cablin’ is derived from ‘cabalam’, a local name in the Philippines. Presently, it is not only cultivated on commercial scale in India but also in Indonesia, Singapore, China, Malaysia, Brazil, West Africa, Seychelles, Vietnam and West Indies.

Introduction
Vetiver/Khas is a fibrous, perennial and aromatic root crop spread over Indian subcontinent. The genus Vetiveria is derived from its Tamil name ‘Vettiver’. It occurred largely in wet and damp environments over marshy lands in south-east Rajasthan and Haryana. Also found in river banks of western, central and northern U.P. up-to 1200 m elevation in the Himalayan foothills, T.N., Karnataka, Kerala and some parts of central India. Besides India, it is also widely grown in Sri Lanka, Indonesia, Haiti, Vietnam and Brazil for its fragrant volatile oil (Guenther, 1972). This species along with its unique xerophytic characteristics of tolerating prolonged drought, also survives under long seasonal flooding; extreme temperature and sustainability over a wide range of soil salinity and alkalinity. The South Indian types are rich in oil percent, but content more of hydrocarbons and less oxygenated constituents, thus inferior to North Indian types having higher percentage of oxygenated compound and very high quality odour value. It belongs to family Graminae or Poaceae.
Uses
• Spongy and fibrous roots are commonly used for making cooler pads, floor mats, door screens emitting sweet fragrance with cooling effect in hot summer season when sprinkled with water as roots retain its delightful odour for a long period.

Introduction
Wild marigold (Tagetes minuta) is also famous as African marigold and mint marigold, valued for its higher content and superior in essential oil quality among all the cultivated species undergenusTagetes. Marigold/Genda (Tagetes species) are mostly grown for scented flowers for utilization in functions all over the world. The flowers and leaves are of different varieties, which are identified by their distinct odouriferous oil.
Origin
It is inhabitant to the grasslands of temperate region in South America and now become widespread throughout the world. In India, it has been customized in the North-West Himalayas up-to an altitudes ranging from1000-2500 meters in H.P., U.P. and J&K. Now-a-days, Tagetes minuta is considered as an extensive weed in South Europe, Africa, South Asia, Australia, and Madagascar (Chalchat et al., 1995). It is found growing naturally as a noxious
weed in the wild and arable farming systems. The high demand of its essential oil may leads into reduction of the wild resources, thus it is essential to start systematic cultivation in sub-tropical to temperate agro-climatic zones all over the world, mainly in the region of Indian subcontinent (Singh et al., 2003).

Microbiologists are constantly at risk of exposure to hazardous microorganisms that can cause diseases. These microorganisms may enter the body through inhalation, ingestion, cuts, abrasions, or the eyes. Therefore, handling cultures, slides, and live microorganisms requires utmost care. To ensure safety in the laboratory, several precautions must be followed:
1. Maintain cleanliness in microbiological labs at all times, taking extra care to prevent contamination from the air, equipment, personnel, or the environment.
2. Always wear a clean white lab coat or apron while working. After handling infectious microorganisms, the lab coat should be autoclaved.
3. No eating, drinking, or smoking is allowed in the laboratory.
4. Personal hygiene is essential in microbiological labs.
5. Wash hands with soap and water or a mild disinfectant solution (e.g., hypochlorite solution containing 50-100 ppm chlorine or 1-2% lysol solution) before starting work.
6. Disinfect the work surface by wiping down the lab bench with a disinfectant solution, such as 5% phenol or hypochlorite solution containing 200-300 ppm chlorine, both before and after work.
7. Keep the work area neat and organized at all times.
8. Use self-adhesive labels instead of moistening labels with your tongue.
9. Sterilize inoculating loops and needles by heating them in a Bunsen burner flame until red hot before and after use.

Introduction
• A cell is the most basic structural and functional unit of life. These are of two types:
i) Prokaryotic cells– Prokaryotes are those cells which lack a membrane bound nucleus and other membrane bound cell organelles. These cells are primitive cells. Examples, bacterial cells, archaeal cells.
ii) Eukaryotic cells– Eukaryotes are those cells which have distinct membrane bound organelles. These are advanced cells. Example, animal cells, plant cells, fungi.
• A microorganisms (from the Greek: mikros, “small” and organism’s, “organism”) are those small living organisms which cannot be seen with naked eyes. These are of two types:
i) Single cell– Organism made up of a single cell.
ii) Multi-cellular– Organism made up of multiple cells.
Shape and Arrangement of Bacterial Cells
• Prokaryotes display following shapes
• Spherical cells called Cocci
• Cylinders called rods or Bacilli
• Coma shaped called Vibrio
 

A. Morphological Examination of Bacterial Samples
Introduction
Bacteria are most widely distributed, the simplest in morphology, the smallest in size and difficult to identify. They are prokaryotic and a few are photosynthetic. Most bacteria are only 0.5 to 2.0 μm in diameter. Bacteria are generally rod, spherical or curved shaped. Rod shaped bacteria may vary considerably in length, have square round or pointed ends and may be motile or non-motile. The spherical or coccus shaped bacteria may occur single, in pairs in tetrads, in chains or in regular masses. The helical and curved shaped bacteria exist as slender spirochetes, spirillum and bent rods (vibrios). In this exercise the ubiquitousness of these organisms will be demonstrated in the air and water, on body and in mouth etc.
Materials
1. Petri plates containing nutrient agar
2. Sterile cotton swabs
3. Sterile water blank
4. Tube of nutrient broth
5. Materials for simple staining

Introduction
Microbiology techniques are used for various objectives like:
• To observe and isolate the micro-flora
• To test the microbiological quality of various food and dairy products
• To find the presence of any particular pathogenic microorganism
• To maintain a pure or mixed culture of specific microorganisms
1. Serial Dilution Techniques
• Bacteria are often present in such huge numbers that they can be difficult to count. Yet accurate counts are necessary for a variety of reasons like, for instance, assessing the quality of water or the safety of food. There are a number of counting techniques but most rely on the dilution of the sample to reduce the bacterial numbers down to a quantity that can be counted accurately.
• All bacterial plate count methods require the sample to be serially diluted until an estimated count of 30-300 colony forming units (CFU) on the plate is obtained. Plates with more than 300 CFU are very difficult to count. Plates with less than 30 CFU are not statistically reliable.
• If turbidity is observed in a broth culture, it might have millions more bacteria than you need. If this turbid broth is used directly for plating, all the CFU would grow together into a confluent mass and we would not be able to distinguish one colony from another.

(A) Effect of Temperature
Introduction
Temperature is one of the most important physical factors affecting microorganisms. Bacteria are different from higher plants and animals in the lack of homeostatic mechanism and cannot regulate heat generated by metabolism and are, therefore, directly and readily affected by temperature. Over a limited temperature range, there is a two-fold increase in the rate of enzyme catalyzed reaction for every 10°C rise in temperature.
Bacteria may be divided into three major groups with respect to their temperature requirements: (i) Psychrophiles, those with optimum temperature between 0°C and 20°C; (ii) Mesophiles, with optimum temperature between 20ºC and 40°C and (iii) Thermophiles, with optimum temperature between 40°C and 80°C. Thermophiles are of two types: (a) Facultative thermophiles with an optimum temperature of growth between 45°C and 60°C and (b) Obligate thermophiles with optimum temperature above 60°C. Temperatures in the range between 50°C and 100°C are normally in the lethal range for bacterial cells and spores. The range of temperature preferred by bacteria is genetically determined, resulting in enzymes with different temperature requirements.
Each organism grows within a particular temperature range (i.e. cardinal temperature points). The minimum growth temperature is the lowest temperature at which growth of a species will occur. The highest temperature at which a species can grow is its maximum growth temperature, and a species grows fastest at its optimum growth temperature.  Time of exposure is a vital factor in assessing the

The concept of Centers of Origin given by Russian scientist N.I. Vavilov (1935) is based on his studies of vast collection of plants at the Institute of Plant  Industry, Leningrad. According to him, crop plants evolved from wild species in the areas showing great diversity and termed them as primary Centers of Origin; but in some areas, certain crop species show considerable diversity of forms although they did not originate their, such areas are known as secondary center of origin of these species. He identified 8 primary centers (Chinese, Indian, Inner Asiatic, Asia Minor, Mediterranean, Abyssinian, South Mexico, Central America and South America Andes Center) and three sub-centers (Indo-Malayan, Chilean and Brazilian-Paraguayan sub-center) of origin for crop plants. Basilevskaya (1960) first investigated the geographical origin of garden plants. Coats (1968) who first stressed out the ornamental herbs whereas Hui-Lin-Li (1974) wrote about the introduction of woody plants. According to Tay (2007) survey of thirty common flowers and their related species show a similar pattern of concentrated occurrence of species in certain geographic regions.
Exploration and exploitation of gene centers need to be proceed with the systematic cooperation of taxonomists, geneticists and plant pathologists. The 17 centers of origin identified for different flower and ornamental crops are
given (Table 2.1)

Plant collection and field preparation of specimens are the fundamental aspects of study, training and research in plant systematics. Herbarium specimens are the permanent records of plant species of a particular place at a given time. Therefore, the plants should be carefully collected, selected, and the herbarium specimens should be properly prepared and preserved.
6.1 Which Type of Specimens Should Be Collected?
The points to be kept in mind during a plant collection are:
1. Collect entire, vigorously growing typical specimens.
2. Select such individuals that represent almost all phases of the natural population.
3. Avoid collecting insect-damaged specimens.
4. Collect underground parts (e.g. roots, bulbs, rhizomes, tubers, etc.) of herbaceous perennials.
5. Collect those specimens of flowering plants that contain flowers, fruits, and seeds, because keys are prepared mainly on the basis of these characters.
6. Specimens larger than the size of a single sheet, should be divided an pressed on a series of sheets.
7. Collect plants with the leaves intact as different kinds of foliage prove helpful in identification.
8. Collect the bark and wood samples of the woody plants.
9. Avoid collecting rare or uncommon plants. Never collect the only plant of a species at a locality.

The application or utility of serology in solving taxonomic problems is called serotaxonomy or systematic serology. The study of antigen-antibody reactions is called serology. It had its origin towards the end of 20th century with the discovery of serological reactions and development of the discipline of immunology. The substance capable of stimulating the formation of an antibody is called antigen. A highly specific protein molecule produced by plasma cells in the immune system is called antibody. The antibodies combine chemically with specific kinds of antigens. Proteins are the useful carriers of
taxonomic information and are most widely used antigens in serotaxonomy.
Serology is Useful in The Following Ways
1. It expresses similarities and dissimilarities amongst different taxa, and these data are helpful in taxonomy. It determines the degree of similarity between species, genera, families, etc. by comparing the reactions of antigens from various plant taxa with antibodies raised against the antigen of a given taxon.
2. It helps in comparing non-morphological characteristics, the knowledge of which is useful in taxonomy.
3. Single proteins from different plant taxa are also compared by serology techniques.

A botanical and horticultural library is a library specializing in the preservation and collection of literature and materials about plants. Botanical libraries are like special libraries are specialized information resources tailored to the unique needs of a particular organization, profession, or subject area. A botanical library is a specialized resource center dedicated to the study of plants and plant science. It typically houses a vast collection of books, journals, and other materials related to botany, horticulture, plant biology, and related fields. The mission of many botanical and horticultural libraries is to make accessible and available to those who use it the information on this topic. Botanical and horticultural libraries can be found in arboretums, botanical gardens, research institutions, horticultural societies, conservatories, governmental offices, colleges, and universities as part of a larger university library.
The collections within these types of libraries cover such topics as flowers, grasses, trees, fungi, aquatic plants, weeds, algae, pests, and fertilizers. The typical collection is composed of books, periodicals, and photo collections. The types of materials depend on the types of patrons. A public botanical
garden library may contain books for children, nursery catalogs, seed catalogs, popular how-to publications, movies, and various other media resources. At an academic library, there may be such archived materials, such as historical letters, autographs of famous botanists, plant lists, field notes, and reports of botanic expeditions. These libraries might include:

14.1 Herbarium and Its Limitations
A collection of dried and pressed plants arranged according to a classification system and available for study or reference is known as herbarium (plural, herbaria), a name first applied by Linnaeus.
Plant specimens are usually mounted on a sheet of high quality paper. Properly dried, pressed and identified plant specimens are placed in thin paper folders (species covers) which are kept together in thicker paper folders (genus covers), and finally they are incorporated into the herbarium cupboards in their proper position. Some fleshy members (e.g. Cactaceae) are preserved in liquid preservatives instead of being pressed and dried. Bulky plant parts (e.g. dry fruits, cones of several gymnosperms, etc.) are dried without pressing and are stored in special bags.
A herbarium may contain a few hundred locally collected plant specimens kept in a small place, or it may contain millions of them collected from different parts of the world and housed in a very big building. Herbaria in different countries remain associated with colleges, universities, scientific societies, research institutes, botanical gardens or flora of a district, state, country, continent or several continents. There are also private herbaria.