内生性 Pseudomonas fluorescens 通过减少乙烯运输来缓解 Atractylodes lancea 的种内异位异位病变
Ling-Sen Cao1, Di Wang1, Chun-Yan Wang1
1Jiangsu Key Laboratory for Pathogen and Ecosystems, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province, China.
BMC plant biology
|November 18, 2024
概括
细菌内生菌Pseudomonas fluorescens ALEB7B通过减少乙烯来缓解Atractylodes lancea中的内属性等位变异,使宿主植物和邻居都受益.
科学领域:
- 植物生物学 植物生物学
- 微生物生态学 微生物生态学
- 农业科学 农业科学
背景情况:
- 内植物增强植物生长,但它们对邻近植物的影响还未得到充分研究.
- 种内类异位异位症限制了药用植物的产量,特别是在Atractylodes lancea.
- 伪体光体ALEB7B在A. lancea等位体病变中的作用以前是未知的.
研究的目的:
- 研究Pseudomonas fluorescens ALEB7B对Atractylodes lancea物种内特异性列病的影响.
- 确定ALEB7B是否影响邻近的A. lancea的乙烯信号和植物生长.
- 阐明ALEB7B影响植物相互作用的机制.
主要方法:
- 评估A. lancea在社区条件下的生长情况,有或没有P. fluorescens ALEB7B接种.
- 将A. lancea暴露在非注射植物和乙烯的挥发性物质中.
- 使用乙烯受体和生产抑制剂.
- 进行转录组分析以研究基因表达变化.
主要成果:
- 非注射的A.lancea由于乙烯诱导的基病变而表现出增长迟缓.
- P. fluorescens ALEB7B 注射减少了乙烯排放,并缓解了邻近植物的生长迟缓.
- 当乙烯信号通路被抑制时,列疗效会减弱.
- 转录组分析显示,ALEB7B改变了邻居的乙烯反应和精油生产途径.
结论:
- 细菌内生植物ALEB7B通过减轻内部特异性等位基病变来使宿主和邻近植物受益.
- 通过内性细菌改变空气中的信号,如乙烯,可以减少负面的植物相互作用.
- 这项研究突出了一个新的机制,以内菌为媒介的植物群体调节.
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