SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Why is a high concentration of auxin used in micropropagation?
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To stimulate development of roots and shoots
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To prevent dormancy
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To stimulate cell division
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To prevent dehydration
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Explanation:
Detailed explanation-1: -When auxin is present in roots at a very low concentration, it promotes root formation, but if the concentration of auxin is high then the root growth is inhibited. The high concentrations of auxin can even be toxic to the plants. Thus, auxin at optimum concentration promotes root formation.
Detailed explanation-2: -The application of very high concentrations of auxin inhibits the growth of shoots directly.
Detailed explanation-3: -Auxin promotes cell division and meristem maintenance and also plays an important role in the establishment of cellular patterning. Plant development thus integrates the regulation of cell proliferation and growth with further cell expansion and differentiation.
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