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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Floral homeotic genes were recruited from homologous MADS-box genes preexisting in the common ancestor of ferns and seed plants
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Floral homeotic genes were recruited from homologous MADS-box genes preexisting in the common ancestor of ferns and seed plants

机译:从蕨类和种子植物共同祖先中存在的同源MADS-box基因中募集花卉同源基因

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摘要

Flowers sensu lato are short, specialized axes bearing closely aggregated sporophylls. They are typ- ical for seed plants (spermatophytes) and are prominent in flowering plants sensu stricto (angiosperms), where they often comprise an attractive perianth. There is evidence that spermatophytes evolved from gymnosperm-like plants with a fern-like mode of reproduction called progymnosperms. It seems plausible, therefore, that the stamens/carpels and pollen sacsucelli of spermatophytes are homologous to fern sporophylls and sporangia, respectively.
机译:花sensu lato是短的专门轴,带有紧密聚集的孢粉。它们是种子植物(种子植物)的典型代表,并在开花植物sensu stricto(Angosperms)中很突出,在这些植物中它们通常包含一个吸引人的花被。有证据表明,精子植物是从裸子植物样植物进化而来,具有像蕨类植物一样的生殖方式,称为前胚乳。因此,似乎有道理的是,种子植物的雄蕊/果皮和花粉囊/核仁分别与蕨类植物的孢子和孢子囊同源。

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