空间异质性和代谢重编程在另一连接阶段在低温压力下减轻小麦的产量损失
Bing Dai1, Weiqiang Li1, Fasih Ullah Haider1
1State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China.
The Plant journal : for cell and molecular biology
|February 28, 2026
概括
在小麦繁殖期间的低温会导致产量损失,从而增加了尖端子流产. 雅斯莫纳酸的应用有助于,同时抑制酸通路恶化小麦 (Triticum aestivum L.) 的产量减少.
科学领域:
- 植物科学 植物科学
- 农业科学 农业科学
- 压力生理学 压力生理学
背景情况:
- 在小麦繁殖期间的低温压力显著降低了产量.
- 前连接阶段对寒冷特别敏感,影响尖端分化.
- 连接低温,峰值发展和产量损失的机制尚未完全理解.
研究的目的:
- 研究低温应激在连接阶段对小麦产量的影响.
- 阐明由寒冷压力引起的代谢和转录组变化.
- 确定涉及减产和潜在减缓策略的关键途径和分子机制.
主要方法:
- 在另一连接阶段,小麦植物遭受了低温压力.
- 代谢学和空间代谢学分析被用来分析不同器官和尖端区域的代谢变化.
- 转录组分析确定了差异表达的基因.
- 外源的甲基斯蒙酸盐应用和酸路径抑制被用来评估功能影响.
主要成果:
- 低温压力显著增加了尖端子流产和降低了产量.
- 寒冷压力重新编程了酸代谢,α-酸代谢,酸盐循环和酸途径.
- 基底尖与中央尖相比,表现出增强的烯酸和α-烯酸代谢,但碳水化合物代谢较弱.
- 在寒冷压力下观察到LOX1.1,OPR11,PFK3,TKL-2和G6PDH基因的升调.
结论:
- 在酸酸和α-酸代谢的调节,以及酸路径的激活,减轻小麦在寒冷压力下的产量减少.
- 在峰值范围内优化同化物分配对于克服低温引起的产量损失至关重要.
- 甲基斯酸盐的应用可以通过平衡碳水化合物分布来缓解产量减少.
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