Question

what is the function of plumule

Answer 1

A cotyledon or seed gives rise to two parts; plumule and radical.

Radical is a region which grows below the ground and gives rise to roots whereas plumule is a part of a seed that grows in above direction from ground. Plumule gives rise to other parts of plants such as stem, leaves and flowers.  

Answer 2

Plumule is the part of the seed embryo that grows into a shoot after the process of seed germination. It is a small portion of the plant, with a bud-like structure, giving rise to the first true leaves and is grown into a plant giving rise to several leaves, branches, flowers, and seeds.