在Sansevieria的叶子结构的转录组分析支持在单片植物中单面叶子的并行进化中有一个共同的遗传工具包
Edward M Golenberg1, Aleksandar Popadić1, Weilong Hao1
1Department of Biological Sciences Wayne State University Detroit Michigan USA.
Plant direct
|August 10, 2023
概括
这项研究调查了桑西维利亚叶子的发育,揭示了YABBY基因表达模式. 平面和圆柱形叶子中的这些图案表明,单叶子形态在干旱环境中发生了平行演变.
科学领域:
- 植物发育生物学 植物发育生物学
- 分子遗传学 分子遗传学
- 进化植物学 进化植物学
背景情况:
- 平面的叶子结构最大限度地提高了表面面积与体积的比率,这对于多细胞生物来说至关重要.
- 叶子形态在不同植物物种之间有很大的差异,影响生理适应.
- 了解叶子发育中的基因表达,为进化过程提供了洞察力.
研究的目的:
- 研究不同叶子形态的桑西维利亚物种的叶边表达模式.
- 为了确定与中侧和轴/轴发育相关的差异表达基因 (DEGs).
- 为了比较平面叶和圆柱形叶桑西维利亚物种之间的基因表达.
主要方法:
- 在 *Sansevieria subspicata*, *Sansevieria trifasciata* (平面) 和 *Sansevieria cylindrica* (圆柱形) 的叶子组织中对基因表达的比较分析.
- 在中心和边缘叶组织之间识别差异表达基因 (DEGs).
- 专注于 *YABBY* 家族基因的表达模式,包括 *FILAMENTOUS FLOWER* 和 *DROOPING LEAF* 的同类.
主要成果:
- 两个*YABBY*基因在平面叶物种的中心叶组织和圆柱形叶组织中过度表达.
- 在 *S. cylindrica* 中的中粒细胞结构表明适应储水,类似于中央平面叶组织.
- 在 *Sansivieria* 和其他单面单动物中观察到的一致的 *YABBY* 基因表达模式.
结论:
- 这项研究表明, *S. cylindrica* 的圆柱形叶子与平面叶子的中心组织类似.
- 过度表达特定的*YABBY*基因与*Sansivieria*的叶子发育和形态学有关.
- 观察到的基因表达模式表明,在单种植物中,由类似的发育解决方案驱动的平行进化.
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