Host Defenses Associated with Fruit Infection by <i>Colletotrichum</i> Species with an Emphasis on Anthracnose of Blueberries

Fig. 2. Basic chemical structures of two common flavonoid groups (anthocyanidins and flavonols) present in fruit of highbush blueberries: (A) anthocyanidin backbone which for anthocyanins is typically glycosylated at the R3 position; and (B) flavonol backbone.



Image from Plant Health Progress article:
Host Defenses Associated with Fruit Infection by Colletotrichum Species with an Emphasis on Anthracnose of Blueberries