BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The phytohormone abscisic acid (ABA) plays a crucial role not only in fruit development and ripening, but also in adaptive responses to biotic and abiotic stresses. In these processes, the actions of ABA are under the control of complex regulatory mechanisms involving ABA metabolism, signal transduction, and transport.

Detailed explanation-2: -So abscisic acid induces dormancy in seeds, which prevents them from germination.

Detailed explanation-3: -Local damage of a leaf gives rise to accumulation of abscisic acid and induction of proteinase inhibitors. It is possible, however, that other signals can be translocated through the wound, which leads to accumulation of abscisic acid.

Detailed explanation-4: -Abscisic acid is a hormone which inhibits growth. Its effects include wilting of leaves, seed dormancy, etc. Hence it is not associated with the growth of plants. Auxin, gibberellins and cytokinins are plant hormones associated with the growth of plants.