BIOLOGY
HORMONES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cytokinins
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Auxins
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Gibberellins
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Abscisic acid
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Ethylene
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Detailed explanation-1: -Cytokinin promotes the growth of lateral buds by suppressing the growth of apical bud.
Detailed explanation-2: -Cytokinins represent a possible second messenger for auxin signalling in regulating bud activity. Endogenous CKs can be transported acropetally (towards the shoot apex) in the xylem sap, enter axillary buds and promote their outgrowth. Thus, CKs antagonize auxin in apical dominance.
Detailed explanation-3: -Cytokinins are essential plant hormones. By stimulating cell division, they regulate shoot meristem size, leaf primordia number, and leaf and shoot growth. They can stimulate both the differentiation and the outgrowth of axillary buds. The cytokinins can mediate axillary bud release from apical dominance.