why is abscisic acid called as stress harmone
Answers
Abscisic acid is called stress hormones as it induces various responses in plants against stress conditions. It increases the tolerance of plants toward various stresses. It induces the closure of the stomata during water stress. It promotes seed dormancy and ensures seed germination during favourable conditions
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It generally plays an overall inhibitory role, notably during physiological stress. It promotes bud dormancy, seed dormancy and abcission . When a plant is in stress due to climatic extremities like excess heat or cold or any other reasons, it produces (Abscisic Acid) hormone. This hormone helps the plant to cope with the changing situation and reduces the stress. For this reason , (Abscisic Acid) is known as stress hormone.