Isolation of Endophytic Actinomycetes from Different Cultivars of Tomato and their Activities Against Ralstonia solanacearum in Vitro
文献类型： 外文期刊
作者： Tan, H. M. 1 ; Cao, L. X. 2 ; He, Z. F. 2 ; Su, G. J. 3 ; Lin, B.; Zhou, S. N.;
作者机构： 1.Zhongshan Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510275, Peoples R China
2.Zhongshan Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510275, Peoples R China; Zhongshan Univ, Sch Life Sci, Dept Biochem, Guangzhou 510275, Peoples R China; Guangdong Acad Agr Sci, Inst Plant Protect, Guangzhou 510640, Peoples R China; Guangxi Univ, Coll Life Sci & Technol, Nanning 530004, Peoples R China
3.Zhongshan Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510275, Peoples R China; Zhongshan Univ, Sch Life Sci, Dept Biochem, Guangzhou 510275, Peoples R China; Guangdong Acad Agr Sci, Inst Plant Protect, Guangzhou 510640, Peoples R China; Guangxi Univ, Coll Life Sci & Technol, Nan
期刊名称：WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY （ 影响因子：3.312； 五年影响因子：3.58 ）
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收录情况： SCI
摘要： The populations of endophytic actinomycetes from healthy and wilting tomato plants (tomato cultivars resistant and susceptible to Ralstonia solanacearum) grown in three different sites from Guangzhou, Guangdong Province, South China were investigated by cultivation methods. Most of the isolates belonged to streptomycetes. The Aureus group of Streptomyces was the most frequently isolated group. The population composition of Streptomyces varied according to tomato cultivars, physiological status and soil types. The proportions of antagonistic Streptomyces strains from healthy plants were higher than that from wilting plants (P < 0.05), although the difference among the proportions of antagonistic Streptomyces strains from different cultivars of healthy tomato was not significant, the similar result was found from wilting plants. No significant difference was found in the proportions of siderophere-producing Streptomyces strains from the same site (P > 0.05), but the difference was found from the different sampling sites (P < 0.05). The percentage of bacterial cell wall-degrading streptomycetes from wilting tomato was higher than that from healthy plants (P < 0.05). These results indicated that the cultivar of the host plant, physiological status and sampling sites would influence the proportion of endophytic streptomycetes with different physiological traits. Diversity of endophytic Streptomyces and their physiological diversity should be involved in developing potential biocontrol agents.
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