在高温下,VvFHY3将auxin和内细胞网膜压力联系起来,以调节葡萄安东素生物合成
Yanzhao Sun1, Yanyan Zheng1, Wenyuan Wang1
1College of Horticulture, China Agricultural University, Beijing 100193, China.
The Plant cell
|November 14, 2024
概括
高温会通过影响基因表达和生物合成速率来降低水果中的安东基氨酸. 这项研究揭示了一种涉及auxin和ER应激通路的调节模块,该模块控制了在热应激下葡萄中安托素的产生.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 农业科学 农业科学
背景情况:
- 安西对水果质量至关重要,其水平受到温度等环境因素的影响.
- 高温通过抑制基因表达和降低生物合成速率,降低葡萄中的安托西亚宁含量.
- 协调这些热应激反应的精确调节机制尚未完全理解.
研究的目的:
- 阐明了葡萄中高温诱导的抗素生物合成抑制的分子机制.
- 为了确定关键的调节因素和涉及热应激反应的途径,与安东素生产相关.
主要方法:
- 研究了辅酶和内细胞网膜 (ER) 应激通路在热介导的氨酸减少中的作用.
- 鉴定和表征了转录因子FAR-RED ELONGATED HYPOCOTYL3 (FHY3) 以及它在素基因调节中的作用.
- 分析了FHY3,辅酶反应因子VvARF3和ER压力传感器VvbZIP17之间的相互作用.
主要成果:
- 高温抑制安托氨酸生物合成依赖于auxin和ER应激通路.
- FHY3 作为转录因子,激活了安托氨酸生物合成基因.
- VvARF3抑制了FHY3的活动,而VvbZIP17抑制了安东素的产生;FHY3负面调节了VvbZIP17.
- ARF3 破坏了 FHY3-VvbZIP17 相互作用,导致 ER 应激增加和抑制了安东素的产生.
结论:
- 一个新的调节模块 (VvARF3-VvFHY3-VvbZIP17) 连接了奥克辛和ER应激通路,以控制高温下安托素生物合成.
- 了解这个模块,可以了解在气候变化条件下改善水果质量的方法.
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