Plant Growth and Development Question 52
52. What is a stress hormone? or The hormone produced during adverse environmental conditions is
[1993]
(a) benzyl aminopurine
(b) dichlorophenoxy acetic acid
(c) ethylene
(d) abscisic acid
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Answer : d
Hints & Solutions
(d) Abscisic Acid (ABA) is called stress hormone which works in adverse environmental condition when there is low water content in the atmosphere or in drought conditions. ABA causes the stomatal closure of leaves due to which the water loss by the plant is minimized.
