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Fermentation optimization and disease suppression ability of a Streptomyces ma. FS-4 from banana rhizosphere soil

文献类型： 外文期刊

作者： Duan, Yajie 1 ; Chen, Jian 2 ; He, Wei 2 ; Chen, Jingjing 1 ; Pang, Zhencai 1 ; Hu, Huigang 1 ; Xie, Jianghui 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, South Subtrop Crop Res Inst, Key Lab Trop Fruit Biol, Minist Agr, Zhanjiang 524091, Peoples R China

2.Hainan Univ, Coll Food Sci & Technol, Haikou 570228, Hainan, Peoples R China

关键词： Streptomyces manipurensis; Fusarium wilt of banana; FS-4; Antimicrobial activity; Culturing conditions

期刊名称：BMC MICROBIOLOGY （ 影响因子：3.605； 五年影响因子：4.283 ）

ISSN： 1471-2180

年卷期： 2020 年 20 卷 1 期

页码：

收录情况： SCI

摘要： Background Fusarium wilt of banana is one of the most destructive diseases in banana-growing regions worldwide. Soil-borne diseases and soil microbial communities are closely related. The screening of antagonistic bacteria from soil microorganisms in areas with Fusarium wilt of banana is of great practical significance for controlling this disease. Results A strain designated FS-4 was isolated from healthy banana rhizosphere soil in an area affected by Fusarium wilt. This strain exhibited a significant antagonistic effect on the pathogen. Pot experiments revealed that the fermentation broth of strain FS-4 not only decreased the incidence of banana Fusarium wilt, but also promoted the growth of banana seedlings. The strain was identified as Streptomyces ma. by its morphological, physiological, and biochemical characteristics and 16S rRNA gene sequence analysis. The culture and fermentation conditions for this strain were optimized by single-factor and response surface experiments. The optimum culture conditions for Streptomyces ma. FS-4 were as follows: peptone 0.5%, saccharose 2.4, 0.05% K2HPO4, 0.05% MgCl2, and 0.05% NaCl at an initial pH of 7.0; 180 g at 28 degrees C; and inoculation size of 6% for 62 h. The diameter of bacteriostasis circle for Bacillus subtilis reached 26.7 mm. Conclusion Streptomyces ma. FS-4 is an important microbial resource as a biological agent for the control of plant pathogenic fungi and can be used to promote banana growth.

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