ENDOCRINE SYSTEM
ENDOCRINE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following plant hormones are most likely to act synergistically if expressed or applied to a drought-stricken plant?
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auxin and ethylene
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gibberellins and abscisic acid
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phytochrome and gibberellins
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abscisic acid and ethylene
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Explanation:
Detailed explanation-1: -So, the correct answer is ‘Abscisic acid’
Detailed explanation-2: -Abscisic acid is an important signaling phytohormone under drought stress (De Ollas et al., 2013). Abscisic acid plays a significant role in regulating stomatal closure, gene upregulation and compatible osmolyte synthesis.
Detailed explanation-3: -Phytohormones are the key mediators of plant responses to drought stress. Water deficit also alters the endogenous synthesis of various phytohormones, including JA, ABA, SA, ET, auxin, gibberellins (GAs), and cytokinins (CKs). ABA is the major stress-responsive hormone produced after signal perception by drought.
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