Bacterial community diversity associated with the severity of bacterial wilt disease in tomato fields in southeast China

文献类型： 外文期刊

第一作者： Zheng, Xuefang

作者： Zheng, Xuefang;Liu, Bo;Zhu, Yujing;Wang, Jieping;Zhang, Haifeng;Wang, Ziran

作者机构：

关键词： bacterial community; bacterial wilt disease; soil nutrients; tomato

期刊名称：CANADIAN JOURNAL OF MICROBIOLOGY （ 影响因子：2.419； 五年影响因子：2.35 ）

ISSN： 0008-4166

年卷期： 2019 年 65 卷 7 期

页码：

收录情况： SCI

摘要： Tomato bacterial wilt caused by Ralstonia solanacearum is a devastating plant disease. The aims of this study were to investigate the relationship among soil nutrients, rhizobacterial community, and abundance of R. solanacearum, and to gather useful information for controlling the disease. Fifteen tomato rhizosphere soils were collected from three regions, encompassing five disease grades. Then, soil physicochemical properties and rhizobacterial communities were investigated. The content of soil organic carbon (SOC), total phosphorus (TP), total potassium (TK), and exchangeable calcium was significantly higher in the healthy plant rhizosphere soils than in diseased plant rhizosphere soils (P < 0.05). The healthy soils had a relatively higher abundance of Proteobacteria and a lower abundance of Acidobacteria than the diseased soils from the same region. Redundancy analysis demonstrated that R. solanacearum abundance was positively correlated with total nitrogen content and negatively correlated with soil pH, SOC, TP, TK, and exchangeable calcium. Ralstonia solanacearum abundance correlated positively with Chloroflexi, Acidobacteria, and Planctomycetes abundance but negatively with Nitrospirae, Bacteroidetes, and Proteobacteria abundance. These results suggested that improving soil pH, applying the amount of P and K fertilizers, and controlling the dosage of N fertilizer might be an effective approach in controlling bacterial wilt disease.

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