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Recognition and Rejection of Self in Plant Reproduction

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Science  12 Apr 2002:
Vol. 296, Issue 5566, pp. 305-308
DOI: 10.1126/science.296.5566.305

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Abstract

Plant self-incompatibility (SI) systems are unique among self/nonself recognition systems in being based on the recognition of self rather than nonself. SI in crucifer species is controlled by highly polymorphic and co-evolving genes linked in a complex. Self recognition is based on allele-specific interactions between stigma receptors and pollen ligands that result in the arrest of pollen tube development. Commonalities and differences between SI and other self/nonself discrimination systems are discussed.

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