Self/non-self discrimination in angiosperm self-incompatibility

Curr Opin Plant Biol. 2012 Feb;15(1):78-83. doi: 10.1016/j.pbi.2011.09.003. Epub 2011 Oct 1.


Self-incompatibility (SI) in angiosperms prevents inbreeding and promotes outcrossing to generate genetic diversity. In many angiosperms, self/non-self recognition in SI is accomplished by male-specificity and female-specificity determinants (S-determinants), encoded at the S-locus. Recent studies using genetic, molecular biological and biochemical approaches have revealed that angiosperms utilize diverse self/non-self discrimination systems, which can be classified into two fundamentally different systems, self-recognition and non-self recognition systems. The self-recognition system, adopted by Brassicaceae and Papaveraceae, depends on a specific interaction between male and female S-determinants derived from the same S-haplotype. The non-self recognition system, found in Solanaceae, depends on non-self (different S-haplotype)-specific interaction between male and female S-determinants, and the male S-determinant genes are duplicated to recognize diverse non-self female S-determinants.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Magnoliopsida / physiology*
  • Models, Biological
  • Self-Incompatibility in Flowering Plants / physiology*