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Lignans are phenyl propanoids dimer found in many plants, particularly in seeds like sesame seeds, linseed, sunflower seeds, pumkin seeds, etc. and they are having anti microbial, anti viral and anti fungal activity.
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Lignans.pptx Use of microbes in industry. Production of Enzymes- General cons...
Lignans are a class of plant polyphenols composed of two linked phenylpropane units. They are found in various plant families and act as antioxidants and defenses against pathogens. The basic lignan structure consists of two phenylpropane units linked by a C-C bond between their central carbons. Major subclasses include furofuran, furan, and dibenzylbutane lignans. Lignans have various biological activities including anticancer, anti-inflammatory, and antioxidant effects. They are often present in plants as glycosylated derivatives and some common examples include secoisolariciresinol and podophyllotoxin.
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These documents discuss different types of plant compounds including isoflavones, flavones, and depsides. Isoflavones are plant compounds related to isoflavonoids that can act as phytoestrogens in mammals. They are produced almost exclusively by legumes. Flavones are a class of flavonoids that contain yellow pigments found in plants. Depsides are polyphenolic compounds composed of aromatic units linked by ester bonds that are commonly found in lichens and have various biological activities like antibiotic and anti-inflammatory properties.
P cognosy of vinca
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Hyoscyamus, also known as henbane, is a poisonous plant species native to Europe, Western Asia, and Northern Africa. It has been used medicinally since ancient times to relieve spasms and as a sedative. The plant contains important alkaloids like hyoscyamine and scopolamine. It is cultivated for its leaves and flowering tops, which are used as a drug containing not less than 0.05% alkaloids. The leaves are pale greyish-green with an acrid, bitter taste and triangular lobes. Hyoscyamus is used as an antispasmodic, expectorant, and to reduce salivary and bronchial secretions. Overdose can
Cannabis sativa
Cannabis sativa is an annual herbaceous flowering plant indigenous to Eastern Asia but now of cosmopolitan distribution due to widespread cultivation.[1] It has been cultivated throughout recorded history, used as a source of industrial fiber, seed oil, food, recreation, religious and spiritual moods and medicine. Each part of the plant is harvested differently, depending on the purpose of its use. The species was first classified by Carl Linnaeus in 1753.[2] The word "sativa" means things that are cultivated.
Pharmacognosy of Vinca
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Alkaloids vinca,rauwolfia,belladona,opium
Swathi Gariganti is an assistant professor at Sree Dattha Institute of Pharmacy who teaches subjects related to pharmacognosy and phytochemistry. This document provides details about the plant Catharanthus roseus including its synonyms, biological source, geographical source, history of use, cultivation and collection methods, macroscopic and microscopic characters, chemical constituents, uses, and dose. It also summarizes information on the cultivation, collection, and chemical constituents of Rauwolfia serpentina.
Herbal Cultivation session 3
This document provides summaries of several plant families, including their botanical descriptions, characteristics, commonly used species, and growing requirements. It discusses families such as Mallow/Malvaceae, Poppy/Papaveraceae, Fumitory/Fumariaceae, Plantain/Plantaginaceae, and others. The document emphasizes the importance of crop rotation by not planting related plant families in the same spot more than every three years to maintain soil health.
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- 1. Lignans
- 2. • In 1936, Haworth defined lignans as “Phenylpropanoid dimers consisting of two phenyl propane units (C6C3) linked by their central C8 carbon.” • Lignans are a subgroup of non-flavonoid polyphenols. • Occurrence of Lignans • They are widely distributed in plant kingdom, being present in more than 55 plant families, where they act as antioxidants and defence molecules against pathogenic fungi and bacteria. Usually occur in root, stem, bark, fruits and seed parts of plant.
- 3. • SUNFLOWER SEEDS: • B.S.: It consists of the dried fully ripe seeds of Helianthus annuus L. belonging to family Asteraceae • Larisiresinol Sources of lignans
- 4. • PUMPKIN SEEDS: • B.S.: It consists of the dried fully ripe seeds of Cucurbita maxima belonging to family Cucurbitaceae. • Secoisolariciresinol
- 5. • FLAX SEEDS: • B.S.: It consists of the dried fully ripe seeds of Linum usitatissimum Linn. belonging to family Liliaceae. Secoisolariciresinol Diglucoside (SDG) • 1 ounce of flaxseed contains 85mg of lignans Secoisolariciresinol Diglucoside
- 6. • SESAME SEEDS: • B.S.: It consists of the dried fully ripe seeds of Sesamum indicum Linn. belonging to family Pedaliaceae. • Sesamin 1 ounce of sesame seeds contain 11 mg of lignans
- 7. • OTHER SOURCES: • Wheat: 7-hydroxymatairesinol • Corn: 7-hydroxymatairesinol • Strawberry: Pinoresinol • Pea: Pinoresinol • Broccoli: Larisiresinol • ROLE OF LIGNAN IN PLANT • Participate in defensive mechanism against pathogens due to its antiviral, anti-bacterial and anti-fungal properties.
- 8. • Biological activity Antiviral Anticancer Cancer prevention Anti-inflammatory antimicrobial antioxidant immunosuppressive Hepatoprotective Osteoporosis prevention