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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)
2015
Source PublicationGEOMICROBIOLOGY JOURNAL
ISSN0149-0451
EISSN1521-0529
Volume32Issue:SI7Pages:585-593
SubtypeArticle
AbstractMn (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).
Keywordmutant strain microcalorimetry manganese-oxidizing bacteria metabolic efficiency biogenic manganese oxide
Subject AreaEnvironmental Sciences & Ecology; Geology
DOI10.1080/01490451.2014.907378
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS SubjectEnvironmental Sciences & Ecology ; Geology
WOS IDWOS:000360307000005
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/228756
Collection中国科学院高能物理研究所
Recommended Citation
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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