Lignans.pptx

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.

1. Lignans

2. In 1936, Haworth defined lignans as “ Phenylpropanoid dimers consisting of two phenyl propane units (C 6 C 3 ) 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