热应激通过影响番茄中的BR-SlCRCa级联,损害了花介质系统的终结和水果的发育
Junqing Wu1, Pengxue Li1, Meng Li1
1College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Plant communications
|January 3, 2024
概括
热应激通过影响花的决定性来破坏番茄果实的发育. 研究人员确定了CRABS CLAW a (SlCRCa) 作为一个关键的调节器,抑制了WUSCHEL (SlWUS) 活动,维持了花结尾和正常的水果形成.
科学领域:
- 植物生物学 植物生物学
- 发育生物学 发展生物学
- 分子遗传学 分子遗传学
背景情况:
- 花系统的终结对于树和果实的发育至关重要.
- 热应激扰乱了花的决定性,导致水果形成不良.
- 热应激对花决定性的影响背后的分子机制尚不清楚.
研究的目的:
- 确定西红中花结合系统终结的关键调节者.
- 阐明龙爪a (SlCRCa) 在花的决定性和热应激反应中的作用.
- 了解热应激如何影响SlCRCa表达和功能.
主要方法:
- 在番茄中SlCRCa的基因鉴定和特征.
- 对SlCRCa监管网络的分析,包括TAG1,SlKNU和Slima.
- 使用直接结合试验调查SlCRCa与SlWUS促进子和内子的结合.
- 在热应力下检查SlCRCa表达模式和brassinosteroids和SlELF3调节的研究.
主要成果:
- 鉴定出SlCRCa是番茄花终结的关键调节者.
- 通过TAG1-SlKNU-SlIMA网络,SlCRCa抑制了SlWUS的活动,确保了适当的终止.
- SlCRCa直接与SlWUS的促进子和第二个内子结合.
- SlCRCa的表达取决于布拉西诺固醇平衡,而这种平衡是由热应激通过SlELF3.3负面调节的.
结论:
- SlCRCa是西红中不可或缺的花干系终结体,对果实发育至关重要.
- 这种SlCRCa-SlWUS相互作用为控制干细胞活动提供了一种新的机制.
- 热应激通过通过SELF3-brassinosteroid通路抑制SlCRCa表达来破坏花的决定性.
- SlCRCa作为蛋白相互作用的平台,可以在花过渡期间表观遗传调节干细胞活性.
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