Answer:
During microsporogenesis, the cells of tapetum provide various enzymes, hormones, amino acids and other nutritive materials to the dividing microsporocytes.
The main functions of tapetum are.
(a) Transportation of nutrients into anther locule at the time of meiosis in spore mother cells,
(b) Secretion of enzymes and hormones,
(c) Production of Ubisch bodies which are coated with sporopollenin to cause thickening of exine,
(d) Secretion of an oily material (pollenkitt) over outerside of mature pollen.
(e) Secretion of special proteins for pollen to recognise compatibility.