Question

Fall of mature leaves and fruits from plants is triggered by which of the following substance?
(a) Auxin
(b) Cytokinin
(c) Gibberellin
(d) Abscisic acid​

Answer 1

Explanation:Abscisic acid

Answer 2

Answer:

Option D - Abscisic acid

Explanation:

Abscisic acid- A growth-inhibiting plant hormone. It is responsible for seed-dormancy and also inhibition of seeds. It also stimulates the closing of the stomata, inhibits shoot growth, and stimulates protein storage in seeds.

Abscisic acid which can trigger the fall of mature leaves and fruits from plants should be responsible for seed-dormancy as it promotes senescence of leaves and causes abscission of flowers and fruits.

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