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Characterization of Lysobacter capsici strain NF87-2 and its biocontrol activities against phytopathogens

文献类型： 外文期刊

作者： Liu, Youzhou 1 ; Qiao, Junqing 1 ; Liu, Yongfeng 1 ; Liang, Xuejie 1 ; Zhou, Yaqiu 1 ; Liu, Jinbing 2 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Plant Protect, 50 Zhongling St, Nanjing 210014, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Vegetable Crops, 50 Zhongling St, Nanjing 210014, Jiangsu, Peoples R China

关键词： Lysobacter capsici; Biocontrol; Copper; Secondary metabolites; Peptides

期刊名称：EUROPEAN JOURNAL OF PLANT PATHOLOGY （ 影响因子：1.907； 五年影响因子：2.022 ）

ISSN： 0929-1873

年卷期： 2019 年 155 卷 3 期

页码：

收录情况： SCI

摘要： Strain NF87-2 is an aerobic, non-motile and rod-shaped Gram-negative bacterium. It was isolated from the rhizosphere of green pepper. In the present study, sequence analyses of the 16S rRNA and copA genes revealed that strain NF87-2 belongs to the species Lysobacter capsici. Strain NF87-2 could produce chitinase, cellulase, protease and siderophore. The strain showed a broad spectrum of antifungal activities against phytopathogens, including Alternaria brassicae, Rhizoctonia solani, Sclerotinia sclerotiorum, Botrytis cinerea, Colletotrichum gloeosporioides and Fusarium oxysporum. The secondary metabolites secreted by strain NF87-2 could inhibit the growth of both bacteria and fungi, but the mixture of peptides and proteins extracts from a suspension of strain NF87-2 could only inhibit the mycelia growth of fungi. Our results also have shown that strain NF87-2 could control pepper damping off caused by R. solani effectively in a greenhouse setting. Our findings provide a new source for a biocontrol agent and shed light on the mechanism of the antagonistic activity of L. capsici.

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