| Microcalorimetric Study on the Growth and Metabolism of a Manganese-Oxidizing Bacterium and its Mutant Strain | |
Zhao, CS; Liu, F; Zhang, Z; Rong, XM; Tan, WF; Feng, XH; Zheng, LR; Chen, XH; Zheng LR(郑黎荣)
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| 2015 | |
| 发表期刊 | GEOMICROBIOLOGY JOURNAL
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| 卷号 | 32期号:SI7页码:585-593 |
| 摘要 | Mn (II)-oxidizing microorganisms are thought to widely participate in the deposition of manganese oxides. However, the underlying physiological functions of Mn (II) oxidation by microorganisms have been poorly understood. In this study, we investigated the production of biogenic manganese oxides under laboratory conditions. The metabolic efficiency of Mn (II)-oxidizing strain MB266 screened from soil, and its mutant strain MB32 without Mn (II)-oxidizing capability, was monitored by microcalorimetry. The heat output directly yielded from Mn (II) oxidation was calculated. Powder X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge structure spectrocopy (XANES) were used to characterize biogenic manganese products. The results showed that the product of biogenic manganese oxidation was a weakly crystallized bixbyite-like phase. The metabolic thermal effects and biomass yields of the strain MB266 and the mutant strain MB32 did not differ significantly when cultured in Mn (II)-free medium. However, when cultured in the medium amended with 1mM Mn (II), MB266 exhibited the greater metabolic efficiency than MB32, suggesting the benefit of bacterial Mn (II)-oxidizing ability in the presence of Mn (II), which might be the one of the underlying physiological functions of possessing the trait. In addition, much lower contribution of the heat derived directly from Mn (II) oxidation to the total heat production suggested Mn (II)-oxidizing bacteria mainly derive energy by decomposing organic substrates for chemoheterotrophic growth rather than by oxidizing Mn (II). |
| 文章类型 | Article |
| 关键词 | mutant strain microcalorimetry manganese-oxidizing bacteria metabolic efficiency biogenic manganese oxide |
| 学科领域 | Environmental Sciences & Ecology; Geology |
| DOI | 10.1080/01490451.2014.907378 |
| 收录类别 | SCI |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:000360307000005 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/228756 |
| 专题 | 多学科研究中心 |
| 推荐引用方式 GB/T 7714 | Zhao, CS,Liu, F,Zhang, Z,et al. Microcalorimetric Study on the Growth and Metabolism of a Manganese-Oxidizing Bacterium and its Mutant Strain[J]. GEOMICROBIOLOGY JOURNAL,2015,32(SI7):585-593. |
| APA | Zhao, CS.,Liu, F.,Zhang, Z.,Rong, XM.,Tan, WF.,...&郑黎荣.(2015).Microcalorimetric Study on the Growth and Metabolism of a Manganese-Oxidizing Bacterium and its Mutant Strain.GEOMICROBIOLOGY JOURNAL,32(SI7),585-593. |
| MLA | Zhao, CS,et al."Microcalorimetric Study on the Growth and Metabolism of a Manganese-Oxidizing Bacterium and its Mutant Strain".GEOMICROBIOLOGY JOURNAL 32.SI7(2015):585-593. |
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