Autotrophic potential in mesophilic heterotrophic bacterial isolates from Sino-Pacific marine sediments
文献类型：CNKI期刊论文
| 作者 | CAO Wenrui; DAS Anindita; SAREN Gaowa; JIANG Mingyu; ZHANG Hongjie; YU Xinke |
| 发表日期 | 2017-02-15 |
| 出处 | Acta Oceanologica Sinica
 |
| 关键词 | autotrophy bacteria mesophiles heterotrophs Sino-Pacific |
| 英文摘要 | Microbial carbon fixation is a paramount process in the ocean especially below the photic zone both in water and sedimentary ecosystems. Autotrophic microbes that fix carbon dioxide are renowned. However, the question whether heterotrophs can also fix carbon is intriguing. Ten heterotrophically grown, identified bacterial isolates from the Sino-Pacific marine sediments were tested for autotrophic uptake potential with and without addition of electron donors. Nine of the ten isolates showed carbon uptake capacity without addition of any substrate at very low rates in the order of 10~(-8) to 10~(-4) fmol/(cell·h). The addition of manganese and ammonium at 1 mmol/L final concentration enhanced the uptake potential. Addition of 1 mmol/L final concentrations of reduced iron(10~(-6) to10~(-5) fmol/(cell·h) and sulfide(10~(-5) fmol/(cell·h) decreased the uptake potential significantly at p<0.1. Bacterial tolerance to formaldehyde suggested propensities of anaplerotic chemical reactions that form metabolic intermediates of C-1 metabolism pathways. The isolates displayed high metabolic flexibility. With the changes in electron donors, the isolates metabolically toggled between relatively anoxic reductive iron/sulfur cycles and the oxidative cycles of manganese/ammonium and vice-versa. This property makes these microbes successful survivors in the highly dynamic Sino-Pacific sediments. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | The National Natural Science Foundation of China under contract Nos 41406062 and 41250110530 ; the Chinese Academy of Science Fellowship for Young Foreign Scientists under contract No.2012Y1ZA0005 |
| 卷 | v.36期:02页:73-81 |
| 语种 | 英文; |
| 分类号 | Q93 |
| ISSN号 | 0253-505X |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/189400]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.KeylaboratoryofMarineGeologyandEnvironment(MAGE),InstituteofOceanology,ChineseAcademyofSciences(IO-CAS) 2.CouncilofScientificandIndustrialResearch(CSIR),NationalInstituteofOceanography 3.MaharashtraAssociationfortheCultivationofScience(MACS),AgharkarResearchInstitute 4.InstituteofBiophysics,ChineseAcademyofSciences(IBP-CAS) |
| 推荐引用方式 GB/T 7714 | CAO Wenrui,DAS Anindita,SAREN Gaowa,et al. Autotrophic potential in mesophilic heterotrophic bacterial isolates from Sino-Pacific marine sediments. 2017. |
入库方式： OAI收割
来源：海洋研究所
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