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IDENTIFICATION OF AN ANTIFUNGAL METABOLITE PRODUCED BY A POTENTIAL BIOCONTROL ACTINOMYCES STRAIN A01

文献类型： 外文期刊

作者： Lu, Cai Ge 1 ; Liu, Wei Cheng 1 ; Qiu, Ji Yan 1 ; Wang, Hui Min 2 ; Liu, Ting 1 ; Liu, De Wen 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant & Environm Protect, Beijing 100097, Peoples R China

2.China Agr Univ, Dept Plant Pathol, Beijing 100094, Peoples R China

关键词： Streptomyces lydicus;natamycin;fungal plant disease;biological control

期刊名称：BRAZILIAN JOURNAL OF MICROBIOLOGY （ 影响因子：2.476； 五年影响因子：3.391 ）

ISSN： 1517-8382

年卷期： 2008 年 39 卷 4 期

页码：

收录情况： SCI

摘要： Actinomyces strain A01 was isolated from soil of a vegetable field in the suburb of Beijing, China. According to the morphological, cultural, physiological and biochemical characteristics, and 16S rDNA sequence analysis, strain A01 was identified as Streptomyces lydicus. In the antimicrobial spectrum test strain A01 presented a stable and strong inhibitory activity against several plant pathogenic fungi such as Fusarium oxysporum, Botrytis cinerea, Monilinia laxa, etc. However, no antibacterial activity was found. In pot experiments in greenhouse, the development of tomato gray mold was markedly suppressed by treatment with the fermentation broth of the strain A01, and the control efficacy was higher than those of Pyrimethanil and Polyoxin. A main antifungal compound (purity 99.503%) was obtained from the fermentation broth of strain A01 using column chromatography and HPLC. The chemical structural analysis with UV, IR, MS, and NMR confirmed that the compound produced by the strain A01 is natamycin, a polyene antibiotic produced by S. chattanovgensis, S. natalensis, and S. gilvosporeus, widely used as a natural biological preservative for food according to previous reports. The present study revealed a new producing strain of natamycin and its potential application as a biological control agent for fungal plant diseases.

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