The final factor concluding angiosperm fertilization
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概要
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Summary: The reproduction process in angiosperms is extremely complicated, compared with that of animals. All theprocess, from gametogenesis to fertilization moment, gradually takes place within crowded gametophytic tissues(pollenand embryo sac). From such a condition above, nothing has been known about gamete interaction moment and relatedmolecular factors, so far. Recently, I succeeded in identifying a novel transmembrane protein GCS1(CENERATIVEC ELL SPECIFIC1), expressed exclusively in male gametes, using generative cells isolated from Lilium longiflorumpollen. In GCS 1 function analyses based on an Arabidopsis GCS1mutant line, GCS1was found to be an importantfa ctor necessary to gamete attachment and fusion. Besides, it was found that GCS1homologues are conserved in slimemolds, algae and parasites, suggesting that they are related not only to angiosperm reproduction, but also to eukaryoticmating, widely. This finding must be an important clue to understanding the angiosperm fertilization moment that hadnot given any molecular biological knowledge, and may greatly contribute to clarification of basic mechanisms in thesexual reproduction.
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日本植物形態学会 | 論文
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