查拉基因组:植物陆地化的二次复杂性和影响
Tomoaki Nishiyama1, Hidetoshi Sakayama2, Jan de Vries3
1Advanced Science Research Center, Kanazawa University, Kanazawa 920-0934, Japan.
Cell
|July 16, 2018
概括
查拉布朗尼的基因组揭示了从藻类到陆地植物的关键进化步骤. 这种复杂的藻类与陆地植物共享遗传基因和机制,
科学领域:
- * 进化生物学
- * 基因组学
- * 生理学
背景情况:
- 陆地植物 (胚胎植物) 从淡水绿藻进化.
- 查罗氏藻类,特别是查拉种,体型复杂,被认为是陆地植物的最近亲属.
- 了解查拉基因组对于识别使植物陆地化成为可能的基因创新至关重要.
研究的目的:
- 为了呈现Chara braunii的基因组序列.
- 为了比较Chara braunii基因组与陆地植物基因组,以确定进化新奇性和共同遗传基因.
- * 为了研究Chara braunii形态复杂性和繁殖策略的遗传基础.
主要方法:
- * 全基因组测序和比较基因组学
- * 基因家族的分析,包括参与细胞壁生物合成,信号传递和耐压的基因家族.
- * 性生殖结构的转录分析.
主要成果:
- * Chara braunii具有独特的细胞壁生物合成和与陆地植物相似的fragmoplast机制.
- * 类似陆地植物的逆行信号控制Chara braunii塑,比其他藻类更复杂的转录调节.
- * 与反应性氧物种 (ROS) 耐受性,LysM受体类激酶和转录因子 (TFs) 相关的扩大基因家族与形态复杂性有关.
- * 转录组数据显示了复杂的TF控制,ROS基因网络活性和原始植物性蛋白质.
结论:
- 查拉布朗尼基因组提供了植物陆地化所需的遗传工具包.
- 这种生物表现出和陆地植物相似的特征,突出显示了关键的进化过渡.
- 查拉布朗尼的复杂形态和繁殖特征是由扩大的基因家族和复杂的调节网络支的.
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