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Changes in bulk soil affect the disease-suppressive rhizosphere microbiome against Fusarium wilt disease

Frontiers of Agricultural Science and Engineering 2020年第3期7卷 307-316页

作者： Lin FU Wu XIONG Francisco DINI-ANDREOTE Beibei WANG Chengyuan TAO Yunze RUAN Zongzhuan SHEN Rong LI Qirong SHEN Jiangsu Provincial Key Laboratory of Solid Organic Waste Uilization Jiangsu Collaborative Innovation Center of Solid Organic WastesEducation Ministry Engineering Center of Resource Saving FertilizersNanjing Agricultural UniversityNanjing 210095China School of Life Sciences Liaoning UniversityShenyang 110036China ecology and Biodiversity Group Department of BiologyInstitute of Environmental BiologyUtrecht UniversityUtrecht3584 CHThe Netherlands Department of Plant Science The Pennsylvania State UniversityUniversity ParkPA 16802USA Huck Institutes of the Life Sciences The Pennsylvania State UniversityUniversity ParkPA 16802USA Hainan Key Laboratory for Sustainable Uilization of Tropical Bio-Resources Institute of Tropical Agriculture and ForestryHainan UniversityHaikou 570228China

Harnessing disease suppressive microbiomes constitutes a promising strategy for optimizing plant growth.However,relatively lttle information is available about the relationship between bulk and rhizosphere soil microbiomes.Here,the assembly of banana bulk soil and rhizosphere microbiomes was investigated in a mono-culture system consisting of bio-organic(BIO)and organic management practices.Applying BIO practice in newly reclaimed fields resulted in a high-efficiency biocontrol rate,thus providing a promising strategy for pre-control of Fusarium wilt disease.The soil microbiota was further characterized by MiSeq sequencing and quantitative PCR.The results indicate that disease suppression was mediated by the structure of a suppressive rhizosphere microbiome with respect to distinct community composition,diversity and abundance.Overall microbiome suppressiveness was primarily related to a particular set of enriched bacterial taxa affiliated with Pseudomonas,Terrimonas,Cupriavi-dus,Gp6,Ohtaekwangia and Duganella.Finally,struc-tural equation modeling was used to show that the changes in bulk soil bacterial community determined its induced rhizosphere bacterial community,which serves as an important and direct factor in restraining the pathogen.Collectively,this study provides an integrative approach to disentangle the biological basis of disease-suppressive microbiomes in the context of agricultural practice and soil management.

关键词： agricultural practice bulk soil disease suppression rhizosphere ecology

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