STRUCTURAL ORGANISTION OF PLANTS AND ANIMALS
ANATOMY OF FLOWERING PLANTS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A
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B
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C
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D
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Detailed explanation-1: -Assertion : In stem, pericycle take active part in secondary growth. <br> Reason : In dicots, pericycle has the capacity to produce lateral roots. Video Solution: Assertion : In stem, pericycle take active part in secondary growth. Reason : In dicots, pericycle has the capacity to produce lateral roots.
Detailed explanation-2: -Depending on the developmental stage and external stimuli, pericycle cell division leads to the production of lateral roots, vascular cambium and periderm, and callus. Therefore, pericycle cell division competence underlies root branching and secondary growth, as well as plant regeneration capacity.
Detailed explanation-3: -In plants undergoing secondary growth, the pericycle contributes to the vascular cambium often diverging into a cork cambium. In angiosperms certain molecules within the endodermis and the surrounding vasculature are sent to the pericycle which promotes the growth of the root meristems.
Detailed explanation-4: -Option:A – Pericycle part above primary phloem is not involved in secondary growth and is thus not involved in the formation of vascular cambium.
Detailed explanation-5: -Secondary growth in dicot root The dicot root also exhibits secondary growth. The increase in width of a dicot root takes place due to two different lateral meristems, i.e., vascular cambium and cork cambium. The vascular cambium and cork cambium are formed as a result of secondary growth.