RSL Class I Genes Controlled the Development of Epidermal Structures in the Common Ancestor of Land Plants.
RSL Class I Genes Controlled the Development of Epidermal Structures in the Common Ancestor of Land Plants.
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DOI：
10.1016/j.cub.2015.11.042
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发表时间：
2016-01-11
期刊：
影响因子：
--
通讯作者：
Dolan L
中科院分区：
文献类型：
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作者：
Proust H;Honkanen S;Jones VA;Morieri G;Prescott H;Kelly S;Ishizaki K;Kohchi T;Dolan L
在4.7亿年前的某个时候，植物对陆地的殖民化伴随着组织系统的进化。从营养获取到繁殖，从最外层（表皮）的单细胞衍生出的具有不同功能的专门结构是当时形态学创新的重要来源。在现存植物中，这些结构可以是单细胞的延伸，如根毛或假根，或多细胞的结构，如无性繁殖体或分泌毛（乳突）。在这里，我们表明，一个根缺陷六样（RSL）I类基本螺旋环螺旋转录因子积极调节发展的单细胞和多细胞结构，从个别细胞扩展出的地钱的表皮平面的地钱;突变体缺乏MpRSL 1功能不发展假根，粘液乳头，粘液乳头，或芽。此外，我们还发现RSL I类基因也是小立碗藓配子体多细胞腋毛发育所必需的。由于I类RSL蛋白也控制苔藓类植物假根和被子植物根毛的发育，这些数据表明，RSL I类基因的功能是控制陆地植物共同祖先中单个表皮细胞衍生结构的发育。因此，I类RSL基因控制了适应性形态多样性的产生，因为植物从水中殖民土地。I类RSL基因控制单细胞衍生结构的发育I类RSL功能在陆地植物中是保守的I类RSL控制陆地植物共同祖先的表皮发育这些基因控制第一个植物生根系统的发育植物对陆地的定殖伴随着从单细胞发育的特化细胞和结构的进化。Proust等显示RSL I类碱性螺旋-环-螺旋转录因子控制陆地植物最后共同祖先中单个表皮细胞的特化结构的发育。
The colonization of the land by plants, sometime before 470 million years ago, was accompanied by the evolution tissue systems. Specialized structures with diverse functions—from nutrient acquisition to reproduction—derived from single cells in the outermost layer (epidermis) were important sources of morphological innovation at this time. In extant plants, these structures may be unicellular extensions, such as root hairs or rhizoids, or multicellular structures, such as asexual propagules or secretory hairs (papillae). Here, we show that a ROOTHAIR DEFECTIVE SIX-LIKE (RSL) class I basic helix-loop-helix transcription factor positively regulates the development of the unicellular and multicellular structures that develop from individual cells that expand out of the epidermal plane of the liverwort Marchantia polymorpha; mutants that lack MpRSL1 function do not develop rhizoids, slime papillae, mucilage papillae, or gemmae. Furthermore, we discovered that RSL class I genes are also required for the development of multicellular axillary hairs on the gametophyte of the moss Physcomitrella patens. Because class I RSL proteins also control the development of rhizoids in mosses and root hairs in angiosperms, these data demonstrate that the function of RSL class I genes was to control the development of structures derived from single epidermal cells in the common ancestor of the land plants. Class I RSL genes therefore controlled the generation of adaptive morphological diversity as plants colonized the land from the water. Class I RSL genes control the development of structures derived from single cells Class I RSL function is conserved among land plants Class I RSL controlled epidermal development in the land plant common ancestor These genes controlled the development of the first plant rooting systems The colonization of the land by plants was accompanied by the evolution of specialized cells and structures that develop from single cells. Proust et al. show that RSL class I basic helix-loop-helix transcription factors controlled the development of specialized structures from single epidermal cells in the last common ancestor of the land plants.