(请使用IE浏览器访问本系统)

  学科分类

  基础科学

  工程技术

  生命科学

  人文社会科学

  其他

篇目详细内容

【篇名】 Root exudates mediate plant defense against foliar pathogens by recruiting beneficial microbes
【刊名】 Soil Ecology Letters
【刊名缩写】 Soil Ecology Letters
【ISSN】 2662-2289
【EISSN】 2662-2297
【DOI】 10.1007/s42832-020-0057-z
【出版社】
【出版年】 2021
【卷期】 3 卷1期
【页码】 42-51 页,共 10 页
【作者】 Tao Wen; Mengli Zhao; Jun Yuan; George A. Kowalchuk; Qirong Shen;
【关键词】 Foliar pathogen resistance|Pseudomonas|Recruitment|Root exudates

【摘要】

•? Long-chain fatty acids and amino acids application could form foliar disease resistant-soil microbial community

•? Population of Pseudomonas was enriched by long-chain fatty acids and amino acids application

•? The enriched Pseudomonas could help plant resistant foliar pathogens.

Plants are capable of releasing specific root exudates to recruit beneficial rhizosphere microbes upon foliar pathogen invasion attack, including long-chain fatty acids, amino acids, short-chain organic acids and sugars. Although long-chain fatty acids and amino acids application have been linked to soil legacy effects that improve future plant performance in the presence of the pathogen, the precise mechanisms involved are to a large extent still unknown. Here, we conditioned soils with long-chain fatty acids and amino acids application (L+ A) or short-chain organic acids and sugars (S+ S) to examine the direct role of such exudates on soil microbiome structure and function. The L+ A treatment recruited higher abundances of Proteobacteria which were further identified as members of the genera Sphingomonas, Pseudomonas, Roseiflexus, and Flavitalea. We then isolated the enriched bacterial strains from these groups, identifying ten Pseudomonas strains that were able to help host plant to resist foliar pathogen infection. Further investigation showed that the L+ A treatment resulted in growth promotion of these Pseudomonas strains. Collectively, our data suggest that long-chain fatty acids and amino acids stimulated by foliar pathogen infection can recruit specific Pseudomonas populations that can help protect the host plant or future plant generations.

版权所有 © CALIS管理中心 2008