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Green Synthesis of Silver Nanoparticles with Culture Supernatant of a Bacterium Pseudomonas rhodesiae and Their Antibacterial Activity against Soft Rot Pathogen Dickeya dadantii

文献类型： 外文期刊

作者： Hossain, Afsana 1 ; Hong, Xianxian 1 ; Ibrahim, Ezzeldin 1 ; Li, Bin 1 ; Sun, Guochang 4 ; Meng, Youqing 5 ; Wang, Yan 1 ;

作者机构： 1.Zhejiang Univ, Inst Biotechnol, State Key Lab Rice Biol, Hangzhou 310058, Zhejiang, Peoples R China

2.Zhejiang Univ, Inst Biotechnol, Minist Agr, Key Lab Mol Biol Crop Pathogens & Insects, Hangzhou 310058, Zhejiang, Peoples R China

3.Sylhet Agr Univ, Dept Plant Pathol & Seed Sci, Sylhet 3100, Bangladesh

4.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Qual & Safety Agroprod Prepared, Hangzhou 310021, Zhejiang, Peoples R China

5.Gen Stn Plant Protect & Quarantine Zhejiang Prov, Hangzhou 310020, Zhejiang, Peoples R China

关键词： green synthesis; silver nanoparticles; Pseudomonas rhodesiae; soft rot; sweet potato

期刊名称：MOLECULES （ 影响因子：4.411； 五年影响因子：4.587 ）

ISSN： 1420-3049

年卷期： 2019 年 24 卷 12 期

页码：

收录情况： SCI

摘要： Bacterial stem and root rot disease of sweet potato caused by Dickeya dadantii recently broke out in major sweet potato planting areas in China and calls for effective approaches to control the pathogen and disease. Here, we developed a simple method for green synthesis of silver nanoparticles (AgNPs) using bacterial culture supernatants. AgNPs synthesized with the cell-free culture supernatant of a bacterium Pseudomonas rhodesiae displayed the characteristic surface plasmon resonance peak at 420-430 nm and as nanocrystallites in diameters of 20-100 nm determined by transmission electron microscopy, scanning electron microscopy, and X-ray diffraction spectroscopy. Functional groups associated with proteins in the culture supernatant may reduce silver ions and stabilize AgNPs. The AgNPs showed antibacterial activities against D. dadantii growth, swimming motility, biofilm formation, and maceration of sweet potato tubers whereas the culture supernatant of P. rhodesiae did not. AgNPs (12 mu g.ml(-1)) and AgNO3 (50 mu g.ml(-1)) showed close antibacterial activities. The antibacterial activities increased with the increase of AgNP concentrations. The green-synthesized AgNPs can be used to control the soft rot disease by control of pathogen contamination of sweet potato seed tubers.

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