其他题名Isolation and electroactive characteristics of a methane-oxidation promoting Pseudomonas putida P7
郝钦钦1,2,3; 张月超1,2,3; 李新1,2,3; 刘芳华1,2
发表期刊微生物学报
ISSN0001-6209
2020
卷号60期号:9页码:2062-2071
关键词甲烷氧化湿地电化学活性
研究领域Life Sciences & Biomedicine - Other Topics
英文摘要[Objective] To analyze the physiological and electrochemical characteristics of a methanotrophs-associated bacteria isolated from the methanotrophic enrichments in the Yellow River Delta wetland soil, and to explore their effect on the methane oxidation process. [Methods] High-throughput sequencing was used to analyze microbial community of methanotrophic enrichments. The methanotrophs-associated strain was isolated using plate smearing and scribing method and initially identified by 16S rRNA gene sequencing. The morphology of the isolate was depicted by scanning electron microscopy. Gas chromatography was used to analyze the methane concentration, which showed the ability of utilizing methane and influence of improving methane oxidation by methanotroph. Two-chamber microbial fuel cells and Differential Pulse Voltammetry were used to test the electrochemical activity. [Results] The microbial community of methanotrophic enrichments from incubation of Yellow River Delta wetland soil included methanotrophs Methylobacter and other accompanying genera. We isolated a methanol-metabolizing bacterium, Pseudomonas putida P7 (with the similarity of 99.79%) which was a rod bacterium with the length between 1.5 m and 2.5 m and width about 0.5 pm. The GC analysis showed that this strain could not use methane but improved methane oxidation (P<0.05). The maximum current density was 28 mA/m~2, and the results of DPV revealed that the oxidation peak and reduction peak occurred at-0.17 V and -0.25 V,respectively. [Conclusion] We successfully isolated an electrochemical activity microbe, Pseudomonas putida P7, with ability of improving methane oxidation. This study deepened the understanding of the physiological characteristics and functions of the methanotroph-associated bacteria in the process of methane oxidation.
中文摘要【目的】解析一株从黄河三角洲湿地甲烷氧化富集物中分离获得的甲烷氧化菌伴生菌的生理学及电化学特性,并探究该菌株对甲烷氧化过程的影响。【方法】使用高通量测序技术解析甲烷氧化富集物的菌群结构,采用稀释涂布法、平板划线法分离甲烷氧化菌的伴生菌,通过16S rRNA基因测序技术进行菌株初步鉴定。利用扫描电子显微镜观察菌株形态,并通过气相色谱(gas chromatography, GC)检测伴生菌利用甲烷情况及对甲烷氧化菌氧化甲烷效率的影响。采用双室微生物燃料电池(microbial fuel cells, MFCs)及差分脉冲伏安法(differential pulse voltammetry,DPV)检测菌株的电化学活性。【结果】黄河三角洲湿地土壤甲烷氧化富集物主要的好氧甲烷氧化菌为甲基杆菌属Methylobacter,同时还发现一些伴生菌。分离得到一株甲醇利用菌P7,其16S rRNA基因序列与恶臭假单胞菌Pseudomonas putida的相似性达99.79%。扫描电镜结果显示该菌株为杆状,长约1.5-2.5 m,宽度约为0.5 m。GC检测结果显示,该菌株不能利用甲烷,但与甲烷氧化菌共培养时,可以促进甲烷氧化(P<0.05)。双室MFCs检测结果显示该菌株具有电活性,最大电流输出密度为28 mA/m~2,DPV检测结果显示该菌株主要的氧化峰和还原峰分别位于-0.17 V和-0.25 V。【结论】本研究从黄河三角洲湿地甲烷氧化富集物中获得一株具有电活性的甲烷氧化菌的伴生菌恶臭假单胞菌Pseudomonas putida P7,该菌株可以促进甲烷氧化。本研究加深了对甲烷氧化过程中伴生菌的生理学特性及功能的认识。
文章类型Article
资助机构国家自然科学基金; 泰山****青年专家计划
收录类别CSCD
语种中文
CSCD记录号CSCD:6799318
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/30339
专题海岸带生物学与生物资源利用重点实验室_海岸带生物学与生物资源保护实验室
作者单位1.中国科学院烟台海岸带研究所,海岸带生物学与生物资源利用重点实验室,山东烟台264003;
2.中国科学院海岸带环境过程与生态修复重点实验室(烟台海岸带研究所),山东烟台264003;
3.中国科学院大学,北京100049
推荐引用方式
GB/T 7714郝钦钦,张月超,李新,等. 一株促甲烷氧化假单胞菌Pseudomonas putida P7的分离及电活性特征[J]. 微生物学报,2020,60(9):2062-2071.
APA郝钦钦,张月超,李新,&刘芳华.(2020).一株促甲烷氧化假单胞菌Pseudomonas putida P7的分离及电活性特征.微生物学报,60(9),2062-2071.
MLA郝钦钦,et al."一株促甲烷氧化假单胞菌Pseudomonas putida P7的分离及电活性特征".微生物学报 60.9(2020):2062-2071.
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