Assertion (A): Even though corm grows vertically, it maintains constant depth in Amorphophallus.
Reason (R): Amorphophallus corm contains pull roots
Explanation
Some underground stems like corms of Amorphoplallus show contractile roots. These roots are adventitious and have the capacity to contract. As they contract, the corm is pulled down. Thus the level of the corm is maintained. These roots pull the corm and hence are also known as pull roots.
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