Question

The insect-pollinated pollen grain, tapetum helps in the development of:
A. Sporopollenin   
B. Cellulose
C. Pectin           
D. Pollen kit

Answer 1

Hint: Tapetum is a specific layer of nutritive cells that can be found in the anthers of flowering plants. These cells are situated between the sporogenous tissue and the wall of the anther.


Step by step solution:
The tapetum that envelops the developing pollen mother cells and microspores gives rise to pollenkitt. It is in charge of providing nourishment and the enzymes needed for pollen maturation and microsporogenesis. Pollenkitt, a highly common adhesive-like substance, is a yellow covering found around pollen grains in practically all angiosperm-related plants. In most cases, animals pollinate these pollens. Because they are extremely sticky, we may state that pollenkitt is primarily found in plants that are pollinated by animals. It resembles an oily covering that gives the pollen stickiness and a distinctive smell while also aiding in insect pollination. Pollenkitt functions as an attaching agent and a protective envelope-like structure. It additionally aids in pollination. Because they are easily dispersed by the breezes, many wind-pollinated plants, including grass, produce significantly drier and far less sticky pollen. The tapetal cells, also known as the tapetum, are primarily responsible for providing the materials needed for the formation of pollenkitt. For the nourishment and growth of pollen grains, tapetum is crucial. Tapetum cells typically have a larger size and many nuclei. During the sporogenous cells' mitotic division, the tapetal cells' nuclei also divide. This will assist in giving the developing pollen grains nutrition and regulatory chemicals.

So, option D is correct.

Note: Tapetum creates the pollenkitt, which is made up of lipids and carotenoids. Pollenkitt functions as an attaching agent and a protective envelope-like structure. It additionally aids in pollination. The pollen coat's predecessors are also found in the tapetum.