name one plant hormone which (a ) retards growth during extremely dry season?
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the plant hormone which retards growth during extremely dry season is *abscisic acid*
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Answer: Abscisic acid
Abscisic acid is a plant hormone, which known as plant stress hormone as it is secreted by the plants in response to stress such tolerance to cold, drought etc. It is well known to play an important role in inhibition of seed germination and in the process of budding.
It is called as stress hormone because it production is stimulated in response to environmental stress conditions. It induces closure of stomata during the condition of water stress.
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