HORTICULTURE

Detailed explanation-1: -Tannins are the most abundant secondary metabolites made by plants, commonly ranging from 5% to 10% dry weight of tree leaves. Tannins can defend leaves against insect herbivores by deterrence and/or toxicity. Contrary to early theories, tannins have no effect on protein digestion in insect herbivores.

Detailed explanation-2: -Beside fruits, tannins are also contained in coffee, tea, red wine and beer. The initial astringent taste when you sip a red wine actually comes from tannins in the wood of the oak barrels in which the wine was aged.

Detailed explanation-3: -Tannins are polyphenolic compounds of plant origin, which bind with proteins, primarily by hydrogen bonding. They are of two distinct types, hydrolyzable tannins (HT), which are polyesters of gallic acid and various individual sugars, and condensed tannins (CT), which are polymers of flavonoid phenols (Reid et al.