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An Aquaporin-Like Gene Required for the Brassica Self-Incompatibility Response

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Science  06 Jun 1997:
Vol. 276, Issue 5318, pp. 1564-1566
DOI: 10.1126/science.276.5318.1564

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Abstract

Self-incompatibility in Brassica refers to the rejection of self-related pollen and is mediated by a receptor protein kinase localized to the plasma membrane of the stigma epidermis in the flower. The recessive mutation mod eliminates self-incompatibility in the stigma. In mod mutants, self-compatibility was shown to be associated with the absence of transcripts encoded by an aquaporin-related gene. This observation suggests that a water channel is required for the self-incompatibility response ofBrassica, which is consistent with the concept that regulation of water transfer from the stigma to pollen is a checkpoint in the early events of pollination in the crucifer family.

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