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剖析两个根相关细菌对侵入性杂草生长的负面影响

Xiangyu Liu¹, Hocelayne Paulino Fernandes^1,2, Adam Ossowicki^1,3

¹Above-Belowground Interactions Group, Institute of Biology, Leiden University, P.O. Box 9505, 2300 RA Leiden, The Netherlands.

FEMS microbiology ecology

|August 22, 2024

概括

两个细菌Serratia plymuthica和Pseudomonas brassicacearum通过根接种和挥发性排放来抑制侵入性杂草的生长. 然而,它们的广泛负面影响限制了它们作为生物控制剂的潜力.

科学领域:

微生物学微生物学
植物病理学植物病理学
生物控制生物控制

背景情况:

与植物相关的微生物可以影响植物的发育,为杂草生物控制提供了机会.
侵袭性杂草Jaccobaea vulgaris受到从其根部分离出来的Serratia plymuthica和Pseudomonas brassicacearum的负面影响.

研究的目的:

为了确定Serratia plymuthica和Pseudomonas brassicacearum是否对J. vulgaris根生长表现出度依赖的影响.
调查细菌代谢物和挥发性排放在观察到的植物生长抑制中的作用.
评估这些细菌在其他植物物种上的宿主特异性.

主要方法:

根内注射J. vulgaris,使用不同度的S. plymuthica和P. brassicacearum.
对无细胞细菌超级生物进行增长抑制活性分析.
暴露于J. vulgaris种子和幼苗的细菌挥发性排放.
测试这两种细菌对另外九种植物物种的影响.

主要成果:

无论是S. plymuthica还是P. brassicacearum都通过细菌细胞显著减少了J. vulgaris的根生长,而S. plymuthica表现出度依赖的效果.
无细胞超级生物中的细菌代谢物没有抑制J. vulgaris根的生长.
两种细菌的挥发性排放抑制了J. vulgaris种子的发芽和幼苗的生长,并观察到不同的挥发性概况.
这些细菌的负面影响不仅限于J. vulgaris,还影响了其他植物物种.

结论:

S. plymuthica和P. brassicacearum通过直接的根相互作用和挥发性生产对J. vulgaris产生负面影响.
这些细菌对非目标物种的广泛植物毒性限制了它们作为特定杂草生物控制剂的应用.

关键词:

细菌的挥发性物质是什么常见的拉格沃特 (Ragwort) 是一种常见的草.度依赖的效应是指度依赖的效应.植物微生物相互作用与根相关的细菌与根相关的细菌.种子的发芽种子的发芽种苗的生长增长种苗的生长增长控制杂草控制杂草控制杂草

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