斯蒙酸路由调节了在寒冷压力期间的脂脱
Li-Qun Huang1,2, Chang Yang2, Aafia Iqbal1
1Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, College of Life Sciences, Hunan Normal University, Changsha, 410081, China.
The New phytologist
|May 9, 2025
概括
植物对寒冷的耐受性涉及到脂变化. 斯酸盐途径通过MYC2调节脂不和,影响基因表达和冷却应激反应.
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:
- 脂对植物耐寒性至关重要,但它们在冷却压力下的调节还不太清楚.
- 在暴露于低温的植物中,发生了新陈代谢变化,包括脂变化.
研究的目的:
- 为了阐明Arabidopsis thaliana中冷诱导的脂调节的机制.
- 为了研究斯酸盐 (JA) 途径在冷压力期间调解脂代谢中的作用.
主要方法:
- 采用了生物化学,分子,细胞生物学和遗传学的方法.
- 对脂质代谢,基因表达 (SLD1,CBF,ICE1) 和JA信号元件 (COI1,MYC2) 的分析.
- 在冷却压力下对野生类型和突变植物进行表型分析.
主要成果:
- 冷却应力通过上调SLD1基因增加了长链基 (LCB) 不和.
- sld1-1突变体表现出减少的叶绿素含量,血膜流动性和在冷却压力下增长.
- 由COI1和MYC2介导的斯酸盐 (JA) 途径调节LCB ∆8双键形成和SLD1转录.
- MYC2还控制CBF和ICE1的表达,它们是关键的冷压调节器.
结论:
- 在植物的寒冷压力期间,JA通路是脂代谢的关键调节者.
- 这项研究揭示了JA信号如何影响脂质功能以增强耐寒性.
- 这些发现提供了关于植物适应低温的基础分子机制的见解.
相关概念视频
02:45Responses to Heat and Cold Stress
13.2K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.2K
01:57Adaptations that Reduce Water Loss
25.0K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.0K
01:31Regulation of the Unfolded Protein Response
2.3K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.3K
02:02Responses to Salt Stress
12.8K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
12.8K
01:23Membrane Fluidity
149.7K
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
149.7K
01:20The JAK-STAT Signaling Pathway
8.4K
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
8.4K