What is the reason for the formation of embryoid from pollen grain in tissue culture-medium?

Cellular totipotency is the ability of a single cell to differentiate into all cell types and to organize them to give rise to an entire organism in a suitable culture medium with appropriate temperature and aeration. Spores and zygotes are some of the examples of totipotent cells. Related Theory In 1902, Professor Gottlieb Haberlandt, proposed the idea of Totipotency. He said that every living cell of the plant body can regenerate the entire plant body because it is obtained from the fertilized egg and contains genetic data.