Characteristics of bacterial communities in rhizosphere soil of greenhouse susceptible tomatoes in the western Sichuan Plateau
[Objective]The present study aimed to explore the response of rhizosphere bacterial communities in greenhouse tomatoes infected with diseases in the western Sichuan Plateau.[Method]The high-throughput technology was used to analyze the structural characteristics of rhizosphere soil microbial communities of diseased and healthy tomatoes in plateau greenhouses in Daofu county and Luhuo county,Ganzi pre-fecture,Sichuan province.[Result](i)The explanatory rate of disease incidence on the total variance of soil bacterial community structure in all samples was 23％ .(ii)The number of bacterial species in soil samples from Daofu county was slightly higher than that of Luhuo county,while the number of bacterial species in diseased plants was slightly lower than that in healthy plants,but none of them had reached a signifi-cant level.(iii)The relative abundance of Warms,Firmicutes,Candidate GAL15 and Spirochetes decreased significantly after tomato disease onset,while the relative abundance of Chlorobacteria,Candidate RCP2-54,Candidate SAR324 and Abnormalities increased significantly after tomato disease onset.(iv)The seven functions of soil bacterial community structure were involved in the health management of greenhouse to-matoes in the western Sichuan Plateau.Among them,the iron respiration function of soil bacteria in Daofu county was weakened,the degrada-tion function of aromatic compounds was enhanced,and the fermentation function in Luhuo county had been greatly improved.(v)In the rhi-zosphere soil of tomatoes,127 bacterial strains significantly responded to the disease in Daofu county and 64 bacterial strains significantly re-sponded to the disease in Luhuo county.The changes in the structure and function of rhizosphere bacteria in Daofu county were due to the de-crease in soil pH,while the changes in the structure and function of rhizosphere bacteria in Luhuo county were due to the increase in organic carbon.[Conclusion]The results reflects a sound microbial function of greenhouse soil in the western Sichuan Plateau.The rhizosphere of dis-eased tomatoes can actively recruit corresponding beneficial microbial communities,represented by Gemmatimonas sp.in Daofu county and Deinococota in Luhuo county.
万方数据
维普
