在干旱压力条件下,Arabidopsis DREB26/ERF12及其近亲调节皮质生物合成
Kaoru Urano1,2, Yoshimi Oshima3, Toshiki Ishikawa4
1RIKEN Center for Sustainable Resource Science, 3-1-1 Koyadai, Tsukuba, 305-0074, Ibaraki, Japan.
The Plant journal : for cell and molecular biology
|October 28, 2024
概括
三个AP2/ERF转录因子DREB26/ERF12,ERF13和ERF14调节植物皮质生物合成. 这些因素通过控制皮质成分和水的透性来增强干旱耐受性.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 植物生理学 植物生理学
背景情况:
- 陆地植物具有疏水性皮质,对陆地生物的生存至关重要,对防止干旱压力至关重要.
- 叶片的组成,主要是和等脂质,显著影响植物的水透性和抗压能力.
- 在干旱条件下,控制皮质生物合成的调控机制仍然不完全理解.
研究的目的:
- 识别和描述涉及调节植物表面水透性的转录因子.
- 阐明特定的AP2/ERF转录因子在干旱压力下皮质生物合成中的作用.
主要方法:
- 识别参与水的透性调节的AP2/ERF转录因子 (DREB26/ERF12,ERF13,ERF14).
- 使用传输电子显微镜在DREB26过度表达 (DREB26OX) 和DREB26SR转基因植物中分析皮层厚度.
- 皮质生物合成基因的基因表达分析和非常长链 (VLC) 基因的量化.
- 在野生型,转基因和三重突变植物的脱水压力下评估水损失.
主要成果:
- DREB26OX植物表现出更厚的皮质和增加的VLC基,而DREB26SR植物表现出更薄的皮质和减少的VLC基.
- 参与皮质形成的基因在DREB26OX中被上调,在DREB26SR植物中被下调.
- 在脱水压力下,DREB26OX工厂的水损失减少,而DREB26SR工厂的水损失增加.
- erf12/13/14的三重突变显示出增长延迟,叶子含水量减少,以及干旱诱导的VLC积受损.
结论:
- DREB26/ERF12,ERF13和ERF14是干旱应激反应中的皮质生物合成的关键调节者.
- 这些转录因子在调节皮层组成和水透性方面发挥着至关重要的作用,增强了植物对干旱的耐受性.
- 这项研究突出了复杂的转录级联,在干旱条件下控制皮质生物合成.
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