What inhibits abscisic acid?

Abscinazole-E3M, a practical inhibitor of abscisic acid 8′-hydroxylase for improving drought tolerance.

How is abscisic acid regulated?

ABA has long been thought to negatively regulate ABA accumulation by activating its catabolic enzymes (Cutler and Krochko, 1999). The activity of a cytochrome P450 enzyme, ABA 8′-hydroxylase, which catalyzes the first step of ABA degradation, was stimulated by exogenous ABA (e.g. Uknes and Ho, 1984).

What is the role of abscisic acid in growth regulation?

Abscisic acid (ABA) is accepted as one of the five major classes of natural plant growth regulators. In many tests ABA inhibits growth and metabolism, and enhances degradative changes, as in ripening and senescence.

Which of the following is the receptor for abscisic acid?

The plant hormone abscisic acid (ABA) has a central role in coordinating the adaptive response in situations of decreased water availability as well as the regulation of plant growth and development. Recently, a 14-member family of intracellular ABA receptors, named PYR/PYL/RCAR, has been identified.

Why does abscisic acid inhibit growth?

The stress hormone abscisic acid (ABA) induces expression of defence genes in many organs, modulates ion homeostasis and metabolism in guard cells, and inhibits germination and seedling growth.

What does abscisic acid control?

Abscisic acid (ABA) is a plant hormone that regulates numerous aspects of plant growth, development, and stress responses. ABA-deficient mutants from various plant species display reduced seed dormancy and wilty phenotypes, highlighting that these crucial ABA functions are conserved in the plant kingdom.

How does ABA acts as a stress hormone?

Abscisic acid helps the plant to survive during unfavourable conditions of the environment. It is observed that when there is a deficiency of water in leaves, ABA concentration increases and it promotes closure of stomata hence it is called stress hormone.

How does abscisic acid inhibit plant growth?

What is the main function of abscisic acid?

Abscisic acid is a sesquiterpene, which has important roles in seed development and maturation, in the synthesis of proteins and compatible osmolytes, which enable plants to tolerate stresses due to environmental or biotic factors, and as a general inhibitor of growth and metabolic activities.

What is a function of abscisic acid?

Abscisic acid (ABA) is a plant hormone. ABA functions in many plant developmental processes, including seed and bud dormancy, the control of organ size and stomatal closure.

What is the role of abscisic acid?

Abscisic acid (ABA) is a key hormone involved in tuning responses to several abiotic stresses and also has remarkable impacts on plant defense against various pathogens. The roles of ABA in plant defense against bacteria and fungi are multifaceted, inducing or reducing defense responses depending on its time of action.

Does abscisic acid controls leaf fall and dormancy?

Option(B): Abscisic acid is responsible for leaf fall and dormancy, Therefore this is the Correct option.