Effect of bacterial intra-species community interactions on the production and activity of volatile organic compounds  

作　　者：Jianing Wang Xinlan Mei Zhong Wei Waseem Raza Qirong Shen 

机构地区：[1]Jiangsu Provincial Key Lab for Organic Solid Waste Utilization,National Engineering Research Center for Organic-based Fertilizers,Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization,Nanjing Agricultural University,Nanjing 210095,China

出　　处：《Soil Ecology Letters》2021年第1期32-41,共10页土壤生态学快报（英文）

基　　金：the National Natural Science Founda-tion of China(Grant numbers 31601835,41671248,41671256);National Key Basic Research Program of China(Grant numbers 2015CB150503,2015CB150500);the Fundamental Research Funds for the Central Universities(Grant numbers KYT201802,KJQN201745);Jiangsu Science and Technology Department(Grant numbers BK20171373,BK20170085).

摘　　要：Microorganisms experience intra-and inter-species interactions in the soil,and how these interactions affect the production of microbial volatile organic compounds(VOCs)is still not well-known.Here we evaluated the production and activity of microbial VOCs as driven by bacterial intra-species community interactions.We set up bacterial communities of increasing biodiversity out of 1–4 strains each of the Gram-positive Bacillus and Gram-negative Pseudomonas genera.We evaluated the ability of each community to provide two VOCmediated services,pathogen suppression and plant-growth promotion and then correlated these services to the production of VOCs by each community.The results showed that an increase in community richness from 1 to 4 strains of both genera increased VOC-mediated pathogen suppression and plant-growth promotion on agar medium and in the soil,which was positively correlated with the production of pathogen suppressing and plant growth-promoting VOCs.Pseudomonas strains maintained while Bacillus strains reduced community productivity with an increase in community richness and produced eight novel VOCs compared with the monocultures.These results revealed that intra-species interactions may vary between Gram-negative and Gram-positive species but improved VOC-mediated functioning with respect to pathogen suppression and plant-growth promotion by affecting the amount and diversity of produced VOCs potentially affecting plant disease outcomes.

关 键 词：BIODIVERSITY Community richness Ecosystem functioning Intra-species interactions Plant-microbe interactions 

分 类 号：X701[环境科学与工程—环境工程]