An ancient mechanism controls the development of cells with a rooting function in land plants
An ancient mechanism controls the development of cells with a rooting function in land plants
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DOI：
10.1126/science.1142618
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发表时间：
2007-06-08
期刊：
影响因子：
56.9
通讯作者：
Dolan, Liam
中科院分区：
文献类型：
--
作者：
Menand, Benoit;Yi, Keke;Dolan, Liam
根毛和假根是陆地植物中具有生根功能的细胞。我们描述了两种基本的螺旋-环-螺旋转录因子，它们控制着被子植物拟南芥孢子体 (2n) 中的根毛发育和苔藓植物小立碗藓 (Physcomitrella patens) 配子体 (n) 中的假根发育。陆地植物的系统发育支持这样的假设：早期的陆地植物是苔藓植物状的，并具有优势配子体，后来孢子体占据了主导地位。如果这个假设是正确的，我们的数据表明古生代孢子体形态复杂性的增加至少部分是由于从配子体到孢子体的调节基因的募集造成的。
Root hairs and rhizoids are cells with rooting functions in land plants. We describe two basic helix-loop-helix transcription factors that control root hair development in the sporophyte ( 2n) of the angiosperm Arabidopsis thaliana and rhizoid development in the gametophytes ( n) of the bryophyte Physcomitrella patens. The phylogeny of land plants supports the hypothesis that early land plants were bryophyte-like and possessed a dominant gametophyte and later the sporophyte rose to dominance. If this hypothesis is correct, our data suggest that the increase in morphological complexity of the sporophyte body in the Paleozoic resulted at least in part from the recruitment of regulatory genes from gametophyte to sporophyte.