寄生植物Striga hermonthica的横向基因转移
Satoko Yoshida1, Shinichiro Maruyama, Hisayoshi Nozaki
1RIKEN Plant Science Center, Tsurumi, Yokohama 230-0045, Japan.
概括
在寄生植物和它们的主体之间证实了横向基因转移 (HGT). 在寄生虫杂草Striga hermonthica中发现了一种单种作物的核基因,提供了自然界中HGT的经验证据.
科学领域:
- 遗传学 是一个遗传学.
- 植物生物学 植物生物学
- 进化生物学 进化生物学
背景情况:
- 横向基因转移 (HGT) 是一种基因物质交换的机制.
- 虽然假定作物和寄生植物之间存在差异,但经验证据很少.
- 草 (Striga hermonthica) 是一种重要的寄生虫杂草,影响了非洲的众多草种.
研究的目的:
- 提供寄生植物和它们的主体之间HGT的经验证据.
- 为了研究核基因从单种植物转移到寄生虫幼虫的转移.
- 为了分析Striga hermonthica的遗传组成,寻找外来基因整合的证据.
主要方法:
- 对Striga hermonthica.的表达序列标签 (EST) 分析.
- 对已识别的基因进行遗传学分析.
- 植物物种 (单虫和虫) 之间基因保护的比较.
主要成果:
- 在Striga hermonthica.中发现了一种核基因,这种基因在单植物中保存,但在其他幼植物中不存在,这种基因在Striga hermonthica.中被发现.
- 遗传学分析表明,这种基因集群与来自的基因相结合,这是已知的S. hermonthica.宿主.
- 这为自然HGT事件提供了有力的证据.
结论:
- 核基因可以自然被寄生虫杂草从它们的单一宿主中捕获.
- 这项研究提供了第一个关于HGT涉及寄生植物核基因的经验证据.
- 这些发现对了解植物进化和制定新的作物保护策略具有重要意义.
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