Journal Article

Molecular Aspects of Self-Incompatibility in <i>Brassica</i> Species

Masao Watanabe, Katsunori Hatakeyama, Yoshinobu Takada and Kokichi Hinata

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 42, issue 6, pages 560-565
Published in print June 2001 | ISSN: 0032-0781
Published online June 2001 | e-ISSN: 1471-9053 | DOI:
Molecular Aspects of Self-Incompatibility in Brassica Species

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry


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Many flowering plants possess self-incompatibility (SI) systems to prevent inbreeding. SI in Brassica species is controlled by a single S locus with multiple alleles. In recent years, much progress has been made in determining the male and female S determinant in Brassica species. In the female, a gain-of-function experiment clearly demonstrated that SRK was the sole S determinant, and that SLG enhanced the SI recognition process. By contrast, the male S determinant (termed SP11/SCR) was identified in the course of genome analysis of S locus to be a small cysteine-rich protein, which was classified as a pollen coat protein. This SP11/SCR may function as a ligand for the S domain of SRK in the SI recognition reaction of Brassica species.

Keywords: Key words: Brassica species — S locus — Self-incompatibility — SLG — SP11/SCR — SRK.; Abbreviations: SLG, S locus glycoprotein; SRK, S receptor kinase; SP11, S locus protein 11; SCR, S locus cysteine-rich protein; SI, self-incompatibility.

Journal Article.  5062 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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