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H₂S 参与了 Arabidopsis 中通过 PLDα1 的干旱介导的口腔关闭

Simin Wang¹, Cuixia Zhang¹, Rongshan Chen¹

¹College of Life Science, Northwest Normal University, Lanzhou, 730070, China.

|May 3, 2024

概括

脂酶Dα1 (PLDα1) 和L-氨酸脱硫酶 (LCD) 通过促进硫化 (H2S) 生产,提高了阿拉比多普西斯的干旱耐受性. 这种H2S积累对于口腔关闭和在干旱压力条件下提高植物弹性至关重要.

科学领域:

植物生物学植物生物学
分子生物学分子生物学
生物化学生物化学

背景情况:

植物对非生物压力的反应,如干旱,涉及复杂的信号通路.
硫化 (H2S) 被认为是植物应激反应中的关键信号分子.
脂酶Dα1 (PLDα1) 是一种参与细胞信号传递和压力感知的酶.

研究的目的:

为了研究PLDα1,H2S生产和Arabidopsis.在干旱压力抵抗之间的功能关系.
阐明PLDα1和L-氨酸脱硫酶 (LCD) 在调节干旱的生理反应中的作用.

主要方法:

使用缺乏PLDα1 (pldα1) 和LCD (lcd) 的阿拉比多普西斯突变物来评估耐旱性.
测量了包括H2O2含量,林积累和膜脂质过氧化等生理参数.
在干旱压力和外源H2S治疗下分析了口腔孔径,基因表达 (qRT-PCR) 和蛋白质水平.

主要成果:

干旱压力诱导了PLDα1和LCD的表达,导致H2S产量增加.
PLDα1积极调节液晶显示器的表达,促进H2S合成.
突变物pldα1和lcd表现出口腔关闭受损和干旱耐受性降低,与野生类型 (WT) 相比,它们的H2O2含量更高,口腔口径更大.
外源的H2S应用在突变者中挽救了口腔表型,而H2S清理则加剧了它.
与口腔运动相关的关键基因的表达在pldα1和lcd突变体中发生了改变.

结论:

PLDα1和LCD是Arabidopsis干旱应激耐受性的重要组成部分.
通过PLDα1介导的抗干旱性取决于H2S的产生,这调节了口腔关闭.
PLDα1-H2S-LCD通路在维持植物水的状态和在干旱条件下生存方面发挥着至关重要的作用.

关键词:

阿拉比多普西斯塔利亚纳.干旱干旱干旱干旱硫化是一种硫化.脂酶 Dα1 的作用.胃部是指胃部的部分.

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