Biocontrol agents modulate phyllosphere microbiota interactions against pathogen Pseudomonas syringae

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外文摘要：The pathogen Pseudomonas syringae,responsible for a variety of diseases,poses a considerable threat to global crop yields.Emerging biocontrol strategies employ antagonistic microorganisms,utilizing phyl-losphere microecology and systemic resistance to combat this disease.However,the interactions be-tween phyllosphere microbial dynamics and the activation of the plant defense system remain poorly understood.Here we show significant alterations in phyllosphere microbiota structure and plant gene expression following the application of biocontrol agents.We reveal enhanced collaboration and inte-gration of Sphingomonas and Methylobacterium within the microbial co-occurrence network.Notably,Sphingomonas inhibits P.syringae by disrupting pathogen chemotaxis and virulence.Additionally,both Sphingomonas and Methylobacterium activate plant defenses by upregulating pathogenesis-related gene expression through abscisic acid,ethylene,jasmonate acid,and salicylic acid signaling pathways.Our results highlighted that biocontrol agents promote plant health,from reconstructing beneficial microbial consortia to enhancing plant immunity.The findings enrich our comprehension of the synergistic in-terplays between phyllosphere microbiota and plant immunity,offering potential enhancements in biocontrol efficacy for crop protection.

外文关键词：

Biological controlMetagenomeTranscriptomeCommunity structurePathogen resistance

作者：

Zhaoyue Yang、Tianbo Liu、Jianqiang Fan、Yiqiang Chen、Shaolong Wu、Jingjing Li、Zhenghua Liu、Zhendong Yang、Liangzhi Li、Suoni Liu、Hongwu Yang、Huaqun Yin、Delong Meng、Qianjun Tang

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作者单位：

College of Plant Protection,Hunan Agricultural University,Changsha,410128,Hunan,China

School of Minerals Processing and Bioengineering,Central South University,Changsha,410083,Hunan,China

Hunan Tobacco Research Institute,Changsha,410004,Hunan,China

Technology Center,Fujian Tobacco Industrial Co.,Ltd.,Xiamen,361000,Fujian,China

School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China

School of Architecture and Civil Engineering,Chengdu University,Chengdu 610106,Sichuan,China

College of Plant Protection,Hunan Agricultural University,Changsha 410128,Hunan,China

Yongzhou Tobacco Corporation,Yongzhou,425000,Hunan,China

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出版年：

2024

DOI：

10.1016/j.ese.2024.100431

环境科学与生态技术(英文)

ISSN：

年,卷(期)：2024.21(5)