AIPMT | 2014Plant Growth and DevelopmentHard

Question

Which one of the following growth regulators is known as ′stress hormone′ ?

Options

A.Abscisic acid
B.Ethylene
C.GA3
D.Indole acetic acid

Solution

ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stresses.

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