BBX7/8-CCA1/LHY转录因子级联通过激活PIF4促进避免阴影
Yeting Bian1, Zhuolong Song1, Changseng Liu1
1State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, National Center for Soybean Improvement, College of Agriculture, Nanjing Agricultural University, Nanjing, 210095, China.
The New phytologist
|November 9, 2024
概括
热爱阳光的植物通过BBX7/8-CCA1/LHY通路激活避阴综合征 (SAS),从而增加PIF4水平以促进低光下生长. 这揭示了植物适应阴影的关键分子机制.
科学领域:
- 植物生物学 植物生物学
- 分子植物生理学分子植物生理学
- 植物开发 植物开发
背景情况:
- 植物表现出避免阴影综合征 (SAS),以争夺阳光,这一过程主要由植物染色体B (phyB) 介导,它感知低红至远红光比率.
- 阴影触发了phyB无活化,导致植物染色体交互因子4 (PIF4) 的积累,并促进了 hypocotyl 延长.
研究的目的:
- 阐明植物在对阴影的反应中调节PIF4表达和 hypocotyl生长的分子机制.
- 确定涉及阴影信号通路的新型转录因子.
主要方法:
- 在Arabidopsis thaliana中进行遗传分析.
- 对基因表达和蛋白质与蛋白质相互作用的分析.
- 研究B盒蛋白7 (BBX7) /BBX8和CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) /LATE ELONGATED HYPOCOTYL (LHY) 在阴影反应中的作用.
主要成果:
- BBX7和BBX8,以及CCA1和LHY,积极调节低红与远红比率诱导的PIF4表达.
- 阴影破坏了phyB与BBX7/BBX8的相互作用,导致它们独立于phyB的积累.
- BBX7/BBX8与CCA1/LHY结合,激活PIF4转录,促进阴影下阴囊细胞的生长.
- BBX7和BBX8在阴影诱导的阴囊延长中对CCA1,LHY和PIF4进行基因上游的功能.
结论:
- 一个涉及BBX7/8和CCA1/LHY的新型转录因子级联调节PIF4表达和丰富度,以应对阴影.
- 这一途径对于促进低光条件下的植物生长和发育至关重要,提高了植物的竞争力.
- 这些发现为植物适应环境光线的机制提供了更深入的理解.
关键词:
阿拉比多普西斯 (Arabidopsis) 是一种植物.BBX7 BBX7 BBX7 BBX7 BBX7 BBX7 BBX7 BBX7 BBX7 BBX7BBX8 BBX8 BBX8 BBX8 BBX8 BBX8 BBX8 BBX8 BBX8 BBX8 BBX8在PIF4中,PIF4是PIF4.植物染色体B 植物染色体B避免阴影,避免阴影.更多相关视频
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