Klebsormidium flaccidum genome reveals primary factors for plant terrestrial adaptation.

Klebsormidium flaccidum genome reveals primary factors for plant terrestrial adaptation.
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DOI:
10.1038/ncomms4978
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发表时间:
2014-05-28
影响因子:
16.6
通讯作者:
Ohta H
Ohta H
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Hori K;Maruyama F;Fujisawa T;Togashi T;Yamamoto N;Seo M;Sato S;Yamada T;Mori H;Tajima N;Moriyama T;Ikeuchi M;Watanabe M;Wada H;Kobayashi K;Saito M;Masuda T;Sasaki-Sekimoto Y;Mashiguchi K;Awai K;Shimojima M;Masuda S;Iwai M;Nobusawa T;Narise T;Kondo S;Saito H;Sato R;Murakawa M;Ihara Y;Oshima-Yamada Y;Ohtaka K;Satoh M;Sonobe K;Ishii M;Ohtani R;Kanamori-Sato M;Honoki R;Miyazaki D;Mochizuki H;Umetsu J;Higashi K;Shibata D;Kamiya Y;Sato N;Nakamura Y;Tabata S;Ida S;Kurokawa K;Ohta H

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植物在陆地上的定居是生命进化中的一个关键事件。在这里,我们报告的草案基因组序列的丝状陆生藻类Klebsormidium flaccidum(轮藻门,目的Klebsormidiales)阐明早期的过渡步骤,从水生藻类到陆地植物。与其他藻类和陆生植物的基因组序列比较表明,K。flaccidum获得了许多陆生植物特有的基因。我们证明了K. flaccidum确实产生几种植物激素和在高等植物中激素作用所需的一些信号传导中间体的同系物。酸克雷flaccidum基因组还编码了一个原始系统,以防止高强度光的有害影响。这些植物相关系统在K. flaccidum认为,在进化过程中,这种昆虫获得了适应陆地环境所需的基本机制。 植物在陆地上的定居是一个重要的进化事件。在这里,作者对丝状陆生藻类的基因组进行了测序,并通过与相关藻类和陆地植物物种的比较分析,深入了解水生藻类如何适应陆地环境。
The colonization of land by plants was a key event in the evolution of life. Here we report the draft genome sequence of the filamentous terrestrial alga Klebsormidium flaccidum (Division Charophyta, Order Klebsormidiales) to elucidate the early transition step from aquatic algae to land plants. Comparison of the genome sequence with that of other algae and land plants demonstrate that K. flaccidum acquired many genes specific to land plants. We demonstrate that K. flaccidum indeed produces several plant hormones and homologues of some of the signalling intermediates required for hormone actions in higher plants. The K. flaccidum genome also encodes a primitive system to protect against the harmful effects of high-intensity light. The presence of these plant-related systems in K. flaccidum suggests that, during evolution, this alga acquired the fundamental machinery required for adaptation to terrestrial environments. Plant colonization of land is an important evolutionary event. Here, the authors sequence the genome of a filamentous terrestrial alga and, through a comparative analysis with related algae and land plant species, provide insight into how aquatic algae adapted to terrestrial environments.
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