AP2/ERF转录因子PtoERF15通过Populus中的JA介导信号传递赋予干旱耐受性
Lingfei Kong1,2, Qin Song1,2, Hongbin Wei1,2
1Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Integrative Science Center of Germplasm Creationin Western China (Chongqing) Science City, School of Life Sciences, Southwest University, Chongqing, 400715, China.
The New phytologist
|September 10, 2023
概括
这项研究揭示了树如何提高干旱耐受性. 该PtoERF15-PtoMYC2b通路调节了体容器的发育,在缺水条件下保持水的潜力.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 干旱 压力生理学 干旱 压力生理学
背景情况:
- 干旱压力显著限制了多年树的生长和发展.
- 在干旱期间,西勒姆容器的发展和功能尚未完全理解.
- 了解这些机制对于提高树木弹性至关重要.
研究的目的:
- 确定在干旱压力下在Populus tomentosa中西勒姆发育的关键分子调节者.
- 为了阐明涉及到调解体血管形态的信号通路,以应对缺水.
- 提供分子证据来改善木的干旱耐受性.
主要方法:
- 鉴定和表征透性压力诱导的基因.
- 基因表达分析 (RNA-Seq) 和生化分析.
- 在树中进行过度表达研究,以评估功能角色.
主要成果:
- 一种由透应激诱导的转录因子PtoERF15,对于树的干旱耐受性至关重要.
- PtoERF15直接调节PtoMYC2b,这是JA信号通路的一个组成部分.
- 反过来,PtoMYC2b的目标是NAC家族基因 (PtoSND1,PtoVND7,PtoNAC118),这些基因参与了体血管形态.
- 对PtoERF15的过度表达维持了茎水的潜力,并提高了干旱耐受性.
结论:
- 该PtoERF15-PtoMYC2b转录级联是树中树血管发育和干旱耐受性的关键调节者.
- 在缺水条件下,这种途径调节容器大小,密度和细胞壁厚度.
- 这些发现为提高树木对干旱的抵御力提供了分子洞察力.
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