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题名: Characterization and Potential Applications of a Selenium Nanoparticle Producing and Nitrate Reducing Bacterium Bacillus oryziterrae sp nov.
作者: Bao, Peng; Xiao, Ke-Qing; Wang, Hui-Jiao; Xu, Hao; Xu, Peng-Peng; Jia, Yan; Haggblom, Max M.; Zhu, Yong-Guan
刊名: SCIENTIFIC REPORTS
出版日期: 2016-09-28
卷号: 6, 页码:-
DOI: 10.1038/srep34054
部门归属: 土壤环境科学实验室
英文摘要: A novel nitrate-and selenite reducing bacterium strain ZYK(T) was isolated from a rice paddy soil in Dehong, Yunnan, China. Strain ZYK(T) is a facultative anaerobe and grows in up to 150, 000 ppm O-2. The comparative genomics analysis of strain ZYK(T) implies that it shares more orthologues with B. subtilis subsp. subtilis NCIB 3610(T) (ANIm values, 85.4-86.7%) than with B. azotoformans NBRC 15712(T) (ANIm values, 84.4-84.7%), although B. azotoformans NBRC 15712(T) (96.3% 16S rRNA gene sequence similarity) is the closest Bacillus species according to 16S rRNA gene comparison. The major cellular fatty acids of strain ZYK(T) were iso-C-14: 0 (17.8%), iso-C-15: 0 (17.8%), and C-16: 0 (32.0%). The polar lipid profile consisted of phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol and an unidentified aminophospholipid. Based on physiological, biochemical and genotypic properties, the strain was considered to represent a novel species of the genus Bacillus, for which the name Bacillus oryziterrae sp. nov. is proposed. The type strain is ZYK(T) (= DSM 26460T = CGMCC 1.5179T). Strain ZYK(T) can reduce nitrate to nitrite and ammonium and possesses metabolic genes for nitrate reduction including nar, nap and nrf. Biogenic selenium nanoparticles of strain ZYK(T) show a narrow size distribution and agree with the gaussian distribution. These selenium nanoparticles show significant dose-dependent inhibition of the lung cancer cell line H157, which suggests potential for application in cancer therapy.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36245
Appears in Collections:土壤环境科学实验室_期刊论文

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