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一种由树根细菌分泌的蛋白质通过IAA34-PUCHI通路诱导横向根的发展

Yansong Fu¹, Yunpeng Liu², Yu Chen¹

¹Key Lab of Organic-based Fertilizers of China and Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China.

|March 12, 2025

概括

有益的细菌分泌巴西洛辛,一种刺激植物侧向根 (LR) 生长的蛋白质. 这种蛋白质触发了一种涉及CEPR2,IAA34,PUCHI和LBD33的新信号通路,以增强LR的发展.

科学领域:

植物生物学植物生物学
微生物学微生物学
分子信号传递是分子信号传递.

背景情况:

侧根 (LRs) 对于植物吸收水和营养是至关重要的.
阿拉比多opsis thaliana LR的发育是由涉及INDOLE-3-ACETIC ACIDs (IAAs) 和AUXIN RESPONSE FACTORS (ARFs) 的辅酶信号通路调节的.

研究的目的:

识别刺激植物横向根部发育的微生物因素.
在调节植物根架构中阐明跨王国通信的分子机制.

主要方法:

鉴定Bacillus velezensis SQR9.9分泌的细菌解素.
研究巴西洛辛与植物受体激酶CEPR2.2之间的相互作用.
分析涉及IAA34,PUCHI和LBD33.3的下游信号通路.

主要成果:

巴西洛辛显著地刺激了Arabidopsis中的LR形成.
CEPR2作为巴西洛辛的受体,调解其对LR发育的影响.
该途径涉及IAA34与PUCHI相互作用以激活LBD33,促进LR启动.

结论:

来自Bacillus velezensis SQR9的Bacillolysin是一种新型蛋白质,促进了Arabidopsis横向根的发展.
一个新的跨王国信号通路,由巴西洛辛启动,涉及CEPR2,IAA34,PUCHI和LBD33,调节LR的形成.

关键词:

CP: 植物植物在IAA34-PUCHI信号级联中.细菌溶解素是一种抗菌素.侧向根部的发展受体蛋白质激酶CEPR2的受体蛋白质激酶 CEPR2 的受体蛋白质激酶这种细菌名为Rhizobacterium.

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