EVERYDAY SCIENCE

Detailed explanation-1: -So, according to the question, plant hormone which promotes seed dormancy, bud dormancy, and causes stomata closure is abscisic acid. Abscisic acid: It is also known as stress hormone.-It acts as a plant growth inhibitor and inhibitor of plant metabolism.

Detailed explanation-2: -Gibberellins (GAs) break seed dormancy and promote germination (1, 2), and several other hormones, including brassinosteroids, ethylene, and cytokinin, have also been shown to promote seed germination (3, 4).

Detailed explanation-3: -Abscisic acid (ABA) is known to regulate the growth of plants, stress, and development response in plants. It has an important role in stomatal closure, cuticular accumulation of wax, senescence of leaf, dormancy of buds, germination of seeds, inhibition of growth, and osmotic regulation.

Detailed explanation-4: -Abscisic acid induces bud dormancy in several plants. Abscisic acid in perennial plants causes the active axillary buds to become dormant. ABA maintains dormancy in many seeds, it accelerated senescence in leaves.

Detailed explanation-5: -Abstract. The addition of abscisic acid (ABA) to mature non-dormant seeds inhibits their germination. This effect of ABA might be related to its natural function as an endogenous inhibitor of precocious germination during seed formation.