title: Significant relationship between soil bacterial community structure and incidence of bacterial wilt disease under continuous cropping system.
abstract: Soil bacteria are very important in biogeochemical cycles and play significant role in soil-borne disease suppression. Although continuous cropping is responsible for soil-borne disease enrichment, its effect on tobacco plant health and how soil bacterial communities change are yet to be elucidated. In this study, soil bacterial communities across tobacco continuous cropping time-series fields were investigated through high-throughput sequencing of 16S ribosomal RNA genes. The results showed that long-term continuous cropping could significantly alter soil microbial communities. Bacterial diversity indices and evenness indices decreased over the monoculture span and obvious variations for community structures across the three time-scale tobacco fields were detected. Compared with the first year, the abundances of Arthrobacter and Lysobacter showed a significant decrease. Besides, the abundance of the pathogen Ralstonia spp. accumulated over the monoculture span and was significantly correlated with tobacco bacterial wilt disease rate. Moreover, Pearson's correlation demonstrated that the abundance of Arthrobacter and Lysobacter, which are considered to be beneficial bacteria had significant negative correlation with tobacco bacterial wilt disease. Therefore, after long-term continuous cropping, tobacco bacterial wilt disease could be ascribed to the alteration of the composition as well as the structure of the soil microbial community.
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, 410083, China.|Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China.
authors.forename: Siyuan
authors.initials: S
authors.lastname: She
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, 410083, China.|Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China.
authors.forename: Jiaojiao
authors.initials: J
authors.lastname: Niu
authors.affiliation: College of Agronomy, Hunan Agricultural University, Changsha, 410128, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, 410083, China.|Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China.
authors.forename: Yunhua
authors.initials: Y
authors.lastname: Xiao
authors.affiliation: College of Agronomy, Hunan Agricultural University, Changsha, 410128, China.
authors.forename: Wu
authors.initials: W
authors.lastname: Chen
authors.affiliation: College of Agronomy, Hunan Agricultural University, Changsha, 410128, China.
authors.forename: Linjian
authors.initials: L
authors.lastname: Dai
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, 410083, China.|Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China.
authors.forename: Xueduan
authors.initials: X
authors.lastname: Liu
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, 410083, China. yinhuaqun@gmail.com.|Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China. yinhuaqun@gmail.com.
authors.forename: Huaqun
authors.initials: H
authors.lastname: Yin
mesh_terms: D001419:Bacteria / Q000235:genetics / Q000302:isolation & purification; D044822:Biodiversity; D000069599:Crop Production; D010935:Plant Diseases / Q000382:microbiology*; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D014026:Nicotiana / Q000382:microbiology*
chemical_list: D012987:Soil
keywords: Bacterial wilt disease; Continuous cropping; Microbial community structure