阴影诱导的RTFL/DVL可以通过直接与Arabidopsis中的BSK相互作用来负面调节阴影反应
Sha Huang1, Yu Ma1, Yitian Xu1
1State Key Laboratory of Genetic Engineering, Institute of Plants Biology, School of Life Sciences, Fudan University, Shanghai, 200438, China.
Nature communications
|October 29, 2023
概括
非分泌的ROT FOUR LIKE (RTFL) ,也称为DEVIL (DVL) ,通过调节避阴综合征 (SAS) 来防止植物的过度生长和产量损失. 这一发现揭示了Arabidopsis的新信号通路.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 避免阴影综合征 (SAS) 是由植物的阴影光触发,导致过度增长和降低作物产量.
- 了解调节SAS的分子机制对于提高作物生产率至关重要.
研究的目的:
- 为了确定Arabidopsis.在阴影避开综合征 (SAS) 的新型调节者.
- 为了阐明RTFL/DVL控制SAS的分子途径.
主要方法:
- 在低R:FR光条件下对RTFL基因的转录分析.
- 对RTFL18 (DVL1) 的蛋白质局部化和稳定性研究.
- 对RTFL18突变体和过度表达线的表型分析.
- 酵母两杂交试验和结构建模以确定BSK交互伙伴.
- 基因分析涉及过度表达和关键途径组件的淘汰.
主要成果:
- 非分泌的ROT FOUR LIKE (RTFL) /DEVIL (DVL) 被确定为SAS的负调节剂.
- RTFL18 (DVL1) 蛋白在低R:FR光下得到稳定,并负面调节树延长.
- RTFL18与BRASSINOSTEROID SIGNALING KINASES (BSKs) 相互作用,特别是与BSK3和BSK6.6相互作用,这两个基因的作用是:
- 过度表达RTFL18或淘汰BSK3/6减少了类固醇信号发送,并降低了低R:FR下的PIF4蛋白水平.
- 遗传证据证实了RTFLs-BSK3/6-PIF4信号级联在防止过度SAS激活方面的作用.
结论:
- 一个新的信号级联,RTFLs-BSK3 / 6-PIF4通道,在Arabidopsis中被描述.
- 这条通路作为一个关键的负反机制,以防止过度激活避阴反应.
- 这些发现为植物光形生成提供了新的见解,并对作物改善有潜在的影响.
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