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Potential of natamycin in enhancing the antagonistic activity of Bacillus amyloliquefaciens BGP20 against post-harvest bacterial soft rot of green pepper

文献类型: 外文期刊

作者: Zhao, Yancun 1 ; Odhiambo, Benard Omondi 2 ; Qiu, Jingping 3 ; Liu, Fengquan 1 ;

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

2.Nanjing Agr Univ, Coll Plant Protect, Nanjing, Jiangsu, Peoples R China

3.Jiangsu Prov & Chinese Acad Sci, Inst Bot, Nanjing, Jiangsu, Peoples R China

关键词: Bacillus amyloliquefaciens;compatibility;competitive position;Erwinia carotovora subsp carotovora;natamycin

期刊名称:BIOCONTROL SCIENCE AND TECHNOLOGY ( 影响因子:1.665; 五年影响因子:1.616 )

ISSN:

年卷期:

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收录情况: SCI

摘要: Bacillus amyloliquefaciens BGP20 is a promising antagonist in controlling post-harvest bacterial soft rot of vegetables caused by Erwinia carotovora subsp. carotovora (Ecc). The objective of this study was to screen a kind of natural and safe additive which could enhance the bio-control activity of BGP20 against post-harvest bacterial soft rot of green pepper. The results of this study indicated that the additive natamycin had stronger inhibition against the pathogen Ecc compared with bamboo vinegar and chitosan in the 2x Yeast extract and Tryptone (2YT) medium. However, natamycin had a slight negative effect on the growth of BGP20 in the 2YT medium. In preventative treatments, natamycin significantly improved the bio-efficacy of BGP20, and enhanced its competitive position against Ecc in the wounds of green pepper. Compared with the treatment with BGP20 alone, the viable count of BGP20 after 72 h of incubation increased by 115.8% in the wounds of green pepper treated with BGP20 and 0.1% natamycin, while that of Ecc decreased by 92.1%. In addition, natamycin remarkably promoted the flocculation of Ecc cells in the 2YT medium, while promoting the dispersion of BGP20. Natamycin had no negative effects on the spore germination of BGP20 and its shelf life. These results indicated that natamycin had perfect compatibility with the antagonist BGP20, and it had a great potential in enhancing the bio-control activity of BGP20 against post-harvest bacterial soft rot of green pepper in preventative treatments.

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