Research Article

The Male Determinant of Self-Incompatibility in Brassica

Science  26 Nov 1999:
Vol. 286, Issue 5445, pp. 1697-1700
DOI: 10.1126/science.286.5445.1697

You are currently viewing the abstract.

View Full Text

Via your Institution

Log in through your institution

Log in through your institution


Abstract

In the S locus–controlled self-incompatibility system of Brassica, recognition of self-related pollen at the surface of stigma epidermal cells leads to inhibition of pollen tube development. The female (stigmatic) determinant of this recognition reaction is a polymorphic transmembrane receptor protein kinase encoded at the S locus. Another highly polymorphic, anther-expressed gene, SCR, also encoded at the Slocus, fulfills the requirements for the hypothesized pollen determinant. Loss-of-function and gain-of-function studies prove that the SCR gene product is necessary and sufficient for determining pollen self-incompatibility specificity, possibly by acting as a ligand for the stigmatic receptor.

  • * To whom correspondence should be addressed. E-mail: jbn2{at}cornell.edu

View Full Text

Cited By...