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Science. 1997 Jun 6;276(5318):1564-6.

An aquaporin-like gene required for the Brassica self-incompatibility response.

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  • 1Section of Plant Biology, Division of Biological Sciences, Cornell University, Ithaca, NY 14853, USA.


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 of Brassica, 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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