The succession pattern of soil microbial communities and its relationship with tobacco bacterial wilt

BMC Microbiology

Research Article

Wu Chen¹  Chao Zhang¹  Linjian Dai¹  Zhongwen Rang¹  Jiaojiao Niu²  Huaqun Yin²  Feng Tian³ 

[1] College of agronomy, Hunan Agricultural University, 410128, Changsha, China;School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, China;Key laboratory of Biometallurgy, Ministry of Education, 410083, Changsha, China;Tobacco monopoly bureau of Xiangxi Autonomous Prefecture, 416000, Jishou, Hunan, China;

关键词: Soil microbial communities;    Succession mechanism;    Crop health;    Illumina sequencing;    Molecular ecological network;   

DOI  :  10.1186/s12866-016-0845-x

 received in 2016-02-07, accepted in 2016-09-21,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundThe interaction mechanism between crop and soil microbial communities is a key issue in both agriculture and soil ecology. However, how soil microbial communities respond to crop planting and ultimately affect crop health still remain unclear. In this research, we explored how soil microbial communities shifted during tobacco cultivation under different rotation systems (control, maize rotation, lily rotation and turnip rotation).ResultsOur analyses showed that soil microbial communities had a general response pattern to tobacco planting, as the abundances of Proteobacteria and Planctomycetes increased while Acidobacteria and Verrucomicrobia decreased during tobacco cultivation, no matter which rotation system was adopted. Notably, tobacco decreased the diversity and co-occurrence of soil microorganisms, but maize rotation might suppress tobacco bacterial wilt by alleviating the decrease in biodiversity and co-occurrence. Molecular ecological network analysis indicated that there was stronger competition between potential disease suppressive (e.g., Acidobacteria) and inducible bacteria (e.g., Chloroflexi) in maize rotation systems. Both soil properties (e.g., pH, Ca content) and microbial communities of tobacco mature period depended on their counterparts of fallow period, and all these factors shaped tobacco disease comprehensively.ConclusionsBoth soil microbial communities of fallow stage and tobacco selection shaped the communities of tobacco mature stage. And effective rotation crop (maize) could decrease the incidence of tobacco bacterial wilt by alleviating the decrease in diversity and co-occurrences of microbial populations. This study would deepen our understanding about succession mechanism of soil microbial communities during crop cultivation and their relationship with crop health.

【 授权许可】

CC BY   
© The Author(s). 2016