从早期的陆地植物到化作物的NAC转录因子的演变
Taehoon Kim1, Javier C Alvarez1,2, Divya Rana1
1Environmental Horticulture Department, University of Florida, PO Box 110670, Gainesville, FL 32611, USA.
Plant & cell physiology
|December 25, 2024
概括
NAC转录因子调节植物生长和应激反应. 它们的进化表明,开花植物的数量显著增加,它们的应激反应机制可以追溯到早期的土地适应.
科学领域:
- 植物分子生物学 植物分子生物学
- 进化基因组学 进化基因组学
- 植物开发 植物开发
背景情况:
- 转录因子对植物生长,发育和应激适应至关重要. NAC (没有角水系,阿拉比多普西斯转录因子1/2,杯状) 转录因子对植物生长,发育和应激适应至关重要.
- 这些因素在植物适应陆地和农作物的化中发挥了关键作用.
研究的目的:
- 扩展NAC转录因子的进化历史,跨越各种植物系,从绿藻到芽种.
- 研究NAC基因家族中的关系和进化模式.
- 了解NAC基因在植物发育和应激反应中的祖先功能和保存机制.
主要方法:
- 植物遗传学分析来自绿藻,植物,白植物,体和血管的代表性NAC转录因子成员.
- 对NAC基因促进体进行Cis元素分析,以确定调控元素.
- 转录表达分析,专注于热应激和生殖组织表达的保存反应.
主要成果:
- 观察到NAC转录因子的数量从绿藻到白色藻类大幅增加,开花植物的数量进一步显著扩大.
- 鉴定尤迪科特和单一科特特异性的NAC类,表明后来的进化多样化.
- 促进体分析揭示了压力 (非生物和生物) 和激素反应元素,表明它们在环境适应和发展中起着古老的作用.
- 在植物王国中,NAC转录因子在男性生殖组织,特别是成熟花粉中表达较低或不存在.
- 在*Marchantia polymorpha*和*Oryza sativa*中发现了对热应激反应的保存表达模式.
结论:
- 应激反应和NAC因子发展的转录机制在植物土地适应的早期出现.
- 这些机制仍然保留在现代的开花植物和化作物中,突出显示了它们的基本重要性.
- 这项研究阐明了植物中NAC转录因子的进化轨迹和保存的功能作用.
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