Summary
Recent studies on the mechanism of self-incompatibility in Brassica indicate the location, nature and mode of action of the molecules involved. Characteristics of the pollen surface and the stigma surface are described in detail, together with new information pertaining to the recognition molecules located therein. A sequence of events is outlined leading from pollination, through adhesion, hydration, germination, and tube growth to acceptance and ultimate compatibility. The characteristics of rejection of incompatible grains are described for each stage of the pollen-stigma interaction. It is proposed that recognition of proteins from the coating of self-pollen by the molecules in the pellicle results in the formation of a biologically-active complex which inhibits water supply to the incompatible grain, and that all other manifestations of incompatibility are a consequence of this initial response.
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Communicated by H.F. Linskens
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Roberts, I.N., Stead, A.D., Ockendon, D.J. et al. Pollen stigma interactions in Brassica oleracea . Theoret. Appl. Genetics 58, 241–246 (1980). https://doi.org/10.1007/BF00265173
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DOI: https://doi.org/10.1007/BF00265173