Explain the role of the tapetum in the formation of a pollen grain wall.
Explain the role of the tapetum in the formation of a pollen grain wall.

Solution: Tapetum is the innermost layer of microsporangium and plays an important role in the formation of pollen grain walls. It provides the required nourishment to the maturing pollen grains. Various essential nutrients like amino acids, enzymes, and hormones are produced by tapetum cells that are essential for the maturation of pollen grains. Tapetum forms the exine layer of pollen grains.