Which plant hormone promotes seed ,but dormany and caues stomatal closure
Or
Presence of ehich of the following in seed is associated with doemancy
Or
Leaf abscission , fruit fall , but dormancy occurs by which phytohormone

Options

A. Auxin
B. Cytokinin
C. Gibberellins
D. Abscisic acid

Answer

D

Explanation

Abscisic acid is a mildly acidic growth inhibitor that promotes abscission, inhibit protein and RNA synthesis as a result senescence of leaves are stimulated, inhibition of seed germination, dormancy of buds and seeds.