Anatomy of Flowering PlantsHard

Question

Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem ?

Options

A.Intrafascicular cambium
B.Interfascicular cambium
C.Intercalary meristem
D.Phellogen

Solution

Phellogen or cork cambium is a part of periderm. It presents between phellem or cork towards uterside and phelloderm or secondary cortex towards inner side. Phellogen appearing in the cortical regions cuts off new cells for extrastelar secondary growth - cork on the outer side and secondary cortex on the inner side.

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