The substance that triggers the fall of mature leaves and fruits from plants is

Auxin

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Gibberellin

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Abscisic acid

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Cytokinin

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Solution

The correct option is C Abscisic acid
The phytohormones, like auxins and gibberellins (GA), have positive growth-promoting effects whereas abscisic acid (ABA) and ethylene have growth-inhibiting effects.
Abscisic acid (ABA) triggers the fall of mature leaves and fruits from plants. It is called abscisic acid because of the formation of the abscission layer, which is responsible for the fall of mature leaves and fruits from plants.

So the correct answer is option C.

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Similar questions

Q. The substance that triggers the fall of mature leaves and fruits from plant is due to

Question 20
The substance that triggers the fall of mature leaves and fruits from plants is

(a) auxin
(b) gibberellin
(c) abscisic acid
(d) cytokinin

Q. The plant hormone which triggers the fall of mature leaves and fruits from the plant body is _________.

Q. X is a plant hormone that promotes the fall of mature leaves and fruits from the plants, while Y is a hormone that regulates protein, carbohydrate, and fat metabolism in the human body. What are X and Y?

The phenomenon of falling of leaves and the fruits from the plant is known as abscission.

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