Tamilnadu BoardEnglish MediumSTD 11BIO BOTANYSecondary Growth3 Marks
Question
Explain the term lenticel.
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Answer
Lenticel is raised opening or pore on the epidermis or bark of stems and roots. It is formed during secondary growth in stems. When phellogen is more active in the region of lenticels, a mass of loosely arranged thin – walled parenchyma cells are formed. It is called complementary tissue or filling tissue. Lenticel is helpful in exchange of gases and transpiration called lenticular transpiration.
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