Is the ?rejection reaction? inducing ability in sporophytic self-incompatible systems restricted only to pollen and tapetum?

Abstract

The present investigation describes the stigmatic rejection response, induced by anther or pollen at developmental stages ranging from anther primordia to mature pollen, as well as in other floral and vegetative tissues. This has been studied in a sporophytic self-incompatible system, Brassica campestris (Brassicaceae). The implications of these observations have been discussed.

Callose in Plant Sexual Reproduction

“…Although the most common self-incompatibility system is of the gametopytic type, amazingly, little is known about the location of pollen recognition factors in this group plants. After incompatible pollination, when the pollen grains also come in contact with the stigmatic papillae, a callose plug develops at the tip between the cell wall and the plasma membrane [79][80]. There is no plug formation after compatible pollination.…”