NEET Biology Plant Growth And Development Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

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Plant Growth And Development Topic Based

Question & Answer Discuss:

Which is produced during water stress that brings stomatal closure?

(a) Abscisic acid

(b) Ethylene

(c) Ferulic acid

(d) Coumarin

Answer: (a)

Abscisic acid is produced during water stress that brings stomatal closure. Abscisic acid is a stress hormone and it is produced during water scarcity, when the transpiration rate exceeds absorption, the plant faces water stress conditions. As a result, incipient wilting occurs. Under water stress conditions ABA increases which induces stomatal closure.

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