Tamilnadu BoardEnglish MediumSTD 11BIO BOTANYSecondary Growth2 Marks
Question
what is periderm?
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Answer
Whenever stems and roots increase in thickness by secondary growth, the periderm, a protective tissue of secondary origin replaces the epidermis and Often primary cortex. The periderm consists of phellem, phellogen, and phelloderm.
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