Which one of the followings option shows the correct labelling of the parts marked as A, B, C and D in the given figure a lenticel?
A. A Epidermis, B Secondary cortex, C Cork cambium, D Cork
B. A Pore, B Cork cambium, C Secondary cortex, D Cork
C. A Pore, B Cork, C Complimentary cells, D Cork cambium
D. A Epidermis, B Complimentary cells, C Cork cambium, D Secondary cortex
Correct Answer : D.
Most of the cells of phellem are dead. But at some places living cells are also found. Suberin is not deposited in these places, These places are known as Lenticels. Lenticels are certain loosely arranged areas in the periderm formed due to rapid activity of phellogen. Lenticels appears on the outer surface of the plant either in small points or in the form of areas of protruberance. Usually they are formed below the stomata. These cells are also known as complementary cells/complementary tissue and helps in gaseous exchange and transpiration.