HORTICULTURE SCIENCE
PLANT BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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lose apical dominance and grow lateral branches.
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lose its ability to develop new roots.
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develop apical dominance and begin to flower.
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show a dramatic and rapid increase in height.
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Detailed explanation-1: -What happens if the apical meristem is removed? The plant will lose apical dominance and grow lateral branches. Therefore, the answer is A. lose apical dominance and grow lateral branches.
Detailed explanation-2: -However, if the shoot apical meristem is removed, by pruning for example, then the axillary meristems will grow into new flowering shoots and branches [fig. 9.9]. This phenomenon by which the growth of apical meristems is suppressed by the shoot apical meristem is called apical dominance.
Detailed explanation-3: -Apical bud dominance may serve as a marker for tuber physiological age. However, it can be altered by a number of abiotic stresses, including storage temperature and chemical sprouting control agents.
Detailed explanation-4: -Removal of the shoot apex leads to the release of dormant axillary buds below it to form branches. Apical dominance allows plants to focus resources into the main axis of growth, while activation of dormant buds allows for recovery after damage or loss of the main shoot.
Detailed explanation-5: -It is due to the plant hormone known as Auxin. It is produced in the tip of the axillary bud and the shoot. Auxin concentration decreases when the apical bud is removed which results in the growth of lateral branches.