Question

what is work of tapteum ?

Answer 1

The tapetum is a specialised layer of nutritive cells found within the anther, of flowering plants, where it is located between the sporangenous tissue and the anther wall. Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat.

Answer 2

______________

The main role of $\bold{tapteum}$ is to provide $\bold{nourishment}$ to the developing pollen grains.

During $\bold{microsporogenesis}$ the cells of tapetum produce various nutritious materials.
_____________

$\bold{Note:-}$

Tapteum also produces the $\bold{exine\:layer}$ of the pollen grains, and this layer is composed of the $\bold{sporopollenin.}$
_____________