BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Abscisic acid (ABA) is a phytohormone known as the “stress hormone”. ABA signaling mediates many types of abiotic stresses, such as drought, salinity, heat and cold stress. In roots, ABA plays an essential role in inhibiting cell division and elongation in response to soil conditions.

Detailed explanation-2: -Abscinazole-E3M, a practical inhibitor of abscisic acid 8′-hydroxylase for improving drought tolerance.

Detailed explanation-3: -Abscisic acid is a plant hormone that regulates growth, development, and stress responses within a plant, specifically through the inhibition of cell division in plant cells (that is, stopping cells from creating more cells).

Detailed explanation-4: -Conversely, CK, ethylene, JA and SA are hormones that inhibit cell division in the PD/MZ.

Detailed explanation-5: -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.