ENDOCRINE ORGANS AND RESPIRATORY SYSTEM
ENDOCRINE ORGANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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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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Detailed explanation-1: -So, the correct answer is ‘Abscisic acid’
Detailed explanation-2: -Auxin acts synergistically with cytokinin to control the shoot stem‐cell niche, while both hormones act antagonistically to maintain the root meristem.
Detailed explanation-3: -Cytokinins are plant hormones which promotes cytokinesis or cell division. It also helps in opening of stomata, delaying ageing in leaves, etc.
Detailed explanation-4: -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-5: -Phytohormones are known to play vital roles in regulating various phenomenons in plants to acclimatize to varying drought environment.