Silver Nanoparticles Synthesized by Using Bacillus cereus SZT1 Ameliorated the Damage of Bacterial Leaf Blight Pathogen in Rice
文献类型： 外文期刊
作者： Ahmed, Temoor 1 ; Shahid, Muhammad 2 ; Noman, Muhammad 1 ; Niazi, Muhammad Bilal Khan 3 ; Mahmood, Faisal 4 ; Manzo 1 ;
作者机构： 1.Zhejiang Univ, Inst Biotechnol, State Key Lab Rice Biol, Hangzhou 310058, Peoples R China
2.Govt Coll Univ, Dept Bioinformat & Biotechnol, Faisalabad 38000, Pakistan
3.NUST, SCME, Sect H-12, Islamabad 44000, Pakistan
4.Govt Coll Univ, Dept Environm Sci & Engn, Faisalabad 38000, Pakistan
5.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, State Key Lab Qual & Safety Agroprod, Hangzhou 310021, Peoples R China
6.Ningbo Univ, Inst Plant Virol, Ningbo 315211, Peoples R China
关键词： antimicrobial activity; BLB; nanotechnology; rice; silver nanoparticles; B. cereus
期刊名称：PATHOGENS （ 影响因子：3.492； 五年影响因子：4.066 ）
ISSN：
年卷期： 2020 年 9 卷 3 期
页码：
收录情况： SCI
摘要： Amongst serious biotic factors deteriorating crop yield, the most destructive pathogen of rice is Xanthomonas oryzae pv. oryzae (Xoo), which causes bacterial leaf blight (BLB) disease. This study involved targeted use of biogenic silver nanoparticles (AgNPs) to control BLB in order to cope with the disadvantages of chemical disease control. AgNPs were biologically synthesized from natively isolated Bacillus cereus strain SZT1, which was identified through 16S rRNA gene sequence analysis. Synthesis of AgNPs in bacterial culture supernatant was confirmed through UV-VIS spectroscopy. Fourier transform infrared spectroscopy (FTIR) confirmed that the existence of AgNPs was stabilized with proteins and alcoholic groups. X-ray diffraction (XRD) data revealed the crystalline nature and imaging with scanning electron microscopy (SEM) and transmission electron microscopy (TEM), showing the spherical shape of AgNPs with particle sizes ranging from 18 to 39 nm. The silver presence in AgNPs was further confirmed by energy dispersive spectra. Biogenic AgNPs showed substantial antibacterial activity (24.21 +/- 1.01 mm) for Xoo. In a pot experiment, AgNPs were found to be effective weapons for BLB by significantly increasing the plant biomass with a decreased cellular concentration of reactive oxygen species and increased concentration of antioxidant enzyme activity.
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