Population Structure of Manganese-oxidizing Bacteria in Stratified Soils and Properties of Manganese

来源 :第十六次全国环境微生物学学术研讨会 | 被引量 : 0次 | 上传用户:winterzeng
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  Manganese(Ⅱ)-oxidizing bacteria in the aquatic environment have been comprehensively investigated.However, little information is available about the distribution and biogeochemical significance of these bacteria in terrestrial soil environments.In this study, stratified soils were examined to investigate the community structure and diversity of Mn(Ⅱ)-oxidizing bacteria as well as the properties of the manganese (Mn) oxide aggregates that these bacteria formed.Phylogenetically diverse bacteria with Mn(Ⅱ)-oxidizing activities were isolated from all substrata.The relatively dominant high Mn(Ⅱ)-oxidizing isolates were identified as the species of phyla Actinobacteria, Firmicutes, and Proteobacteria.The diversity of soil bacterial community was significantly increased after the combined enrichment of culture medium by Mn(Ⅱ) and carbon-rich complex.The enriched bacteria represented by predominant denaturing gradient gel electrophoresis bands were apparently tolerant to Mn(Ⅱ) at a certain level and belonged to the similar phylogenetic classifications with those of culturable Mn(Ⅱ)-oxidizing bacteria.Under prolonged Mn(Ⅱ) and carbon-rich medium enrichment, those isolates with high Mn(Ⅱ)-oxidizing activity were closely packed with their Mn oxides and formed regular microspherical aggregates.
其他文献
古生物学做为地质学的重要基础学科,其课堂教学、室内化石标本观察和野外化石采集实践一直是兰州大学地质科学与矿产资源学院在地质类人才培养过程中的重要环节.特别是在古生物学野外实践教学方面,学院的古生物学教师结合自己的专业特长实施了不同的实践方案,使学生从不同的角度对古生物学及其野外实践的重要性有了深刻的理解.在具体的实施过程中,形成了一种教学和实践模式.即课堂活跃互动,激发学习兴趣;支持学生申请科研项
Antibiotic resistance is a global phenomenon with wide use of antibiotics in human health care and breeding industry.Antibiotics resistance genes (ARGs) can be horizontally transferred to human and an
Biosurfactant is a kind of amphoteric compounds deriving from organisms with both hydrophilic group and hydrophobic group.It has been applied in various fields, such as in the regulation and control o
筛选出1株耐盐异养硝化-好氧反硝化菌ADN-42,通过形态观察、生理生化试验和16SrDNA序列分析,确定其为假单胞菌属施氏假单胞菌(Pseudomonas);对菌株ADN-42的nosZ基因进行克隆测序和系统发育分析,结果表明该菌基因组含有一氧化二氮还原酶功能基因;优化了异养硝化-好氧反硝化的最适条件为以氯化铵为唯一氮源,柠檬酸三钠为唯一碳源,温度=30℃,C/N=12,pH=7.0,摇床转速1
同型产乙酸菌纯培养物的获得,可为研究其在厌氧生物处理系统中的生理生态功能以及化工溶剂乙酸的生产提供种质资源.以H2/CO2为碳源,采用改良Hungate 厌氧技术,从厌氧活性污泥中分离得到一株同型产乙酸菌CA3.该菌株为严格厌氧,卵形,G+,可利用H2/CO2产乙酸,也能发酵葡萄糖、果糖等产生乙酸.16S rRNA基因序列比对及系统发育树构建结果表明CA3隶属Blautia.菌株CA3能在20℃~
微生物污染与腐蚀是考古发掘现场普遍存在的问题,对于文物附存环境中微生物的监测关系到出土文物的科学保护.本研究以"文物出土现场保护移动实验室"为现场实验基础平台,分析了山西翼城大河口西周墓地M1017号竖直墓道剖面不同深度土壤内可培养微生物数量的变化,并利用Anderson FA-Ⅰ型空气微生物采样器和基于培养的手段对比分析了墓道底部与外环境中空气微生物浓度和粒径分布的差异.结果表明:除墓道底层外(
The moderately halophilic bacterium Halomonas sp.QHL1, isolated from Qinghai Lake in China, was identified as a member of the genus Holomonas by 16S rRNA gene sequencing.HPLC analysis showed that stra
As the most potential greenhouse gas contributing to global warming, nitrous oxide (N2O) contributes to the destruction of the stratospheric ozone layer and global climate change.The objectives of thi
会议