Identification and genomic analysis of antifungal property of a tomato root endophyte Pseudomonas sp p21
文献类型： 外文期刊
作者： Ma, Rongqin 1 ; Cao, Yi 3 ; Cheng, Zhiqiang 1 ; Lei, Shaonan 1 ; Huang, Wei 4 ; Li, Xin 1 ; Song, Yongkang; Tian, Baoy 1 ;
作者机构： 1.Fujian Normal Univ, Engn Res Ctr Ind Microbiol, Minist Educ, Fuzhou 350108, Fujian, Peoples R China
2.Fujian Normal Univ, Coll Life Sci, Fuzhou 350108, Fujian, Peoples R China
3.Guizhou Acad Tobacco Sci, Key Lab Mol Genet, Guiyang 550081, Guizhou, Peoples R China
4.Fujian Acad Agr Sci, Inst Qual Stand & Testing Technol Ag
关键词： Pseudomonas;Antifungal activity;Genomic analysis;Siderophore pyoverdine;Microbe-pathogen-plant interaction
期刊名称：ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY （ 影响因子：2.271； 五年影响因子：2.707 ）
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收录情况： SCI
摘要： Pseudomonas sp., which occupy a variety of ecological niches, have been widely studied for their versatile metabolic capacity to promote plant growth, suppress microbial pathogens, and induce systemic resistance in plants. In this study, a Pseudomonas sp. strain p21, which was isolated from tomato root endophytes, was identified as having antagonism against Aspergillus niger. Further analysis showed that this strain had the ability to biosynthesise siderophores and was less effective in inhibiting the growth of A. niger with the supplementation of Fe3+ in the agar medium. Genomic sequencing and the secondary metabolite cluster analysis demonstrated that Pseudomonas sp. p21 harboured 2 pyoverdine biosynthetic gene clusters, which encode compounds with predicted core structures and two variable tetra-peptide or eleven-peptide chains. The results indicated that siderophore-mediated competition for iron might be an important mechanism in Pseudomonas suppression of the fungal pathogen A. niger and in microbe-pathogen-plant interactions.
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