Quantitative analysis of O2 and Fe2+ profiles in gradient tubes for cultivation of microaerophilic Iron(II)‐oxidizing bacteria
Quantitative analysis of O2 and Fe2+ profiles in gradient tubes for cultivation of microaerophilic Iron(II)‐oxidizing bacteria
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用于微需氧铁(II)氧化细菌培养的梯度管中 O2 和 Fe2 分布的定量分析
DOI:
10.1093/femsec/fix177
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发表时间:
2018
影响因子:
4.2
通讯作者:
Schmidt
中科院分区:
文献类型:
--
作者:
Lueder;Druschel;Emerson;Kappler;Schmidt
The classical approach for the cultivation of neutrophilic microaerophilic Fe(II)-oxidizing bacteria is agar-based gradient tubes where these bacteria find optimal growth conditions in opposing gradients of oxygen (O2) and dissolved Fe(II) (Fe2+). The goals of this study were to quantify the temporal development of O2and Fe2+concentrations over time, to compare abiotic and microbially inoculated tubes and to test the suitability of different Fe(II)-sources for the cultivation of freshwater and marine microaerophilic Fe(II)-oxidizers. O2and Fe2+gradients were monitored on a high spatial resolution as a function of time applying amperometric and voltammetric microsensors. Fe(II)-oxidizers could be cultivated well with FeS and zero-valent iron powder as Fe(II)-source, but FeCO3and FeCl2are extremely sensitive for this application. Fe(III) minerals accumulated in inoculated tubes within the first days in regions with an O2concentration of 20–40 μM and were confirmed to be related to bacterial growth. Microbial Fe(II) oxidation could compete only for the first days with the abiotic reaction after which heterogeneous Fe(II) oxidation, catalyzed by Fe(III) minerals, dominated. Our results imply that transfer of cultures to fresh tubes within 48–72 h is crucial to provide optimal growth conditions for microaerophilic Fe(II)-oxidizers, particularly for the isolation of new strains.
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影响因子:
2.3
作者:
A. J. Slowey;M. Marvin
通讯作者:
M. Marvin
影响因子:
4.4
作者:
D. Sobolev;E. Roden
通讯作者:
D. Sobolev;E. Roden
DOI:
10.1099/00221287-139-7-1531
发表时间:
1993-07-01
期刊:
JOURNAL OF GENERAL MICROBIOLOGY
影响因子:
--
作者:
HALLBECK, L;STAHL, F;PEDERSEN, K
通讯作者:
PEDERSEN, K
影响因子:
2.8
作者:
DANNENBERG, S;KRODER, M;CYPIONKA, H
通讯作者:
CYPIONKA, H
影响因子:
4.4
作者:
Neubauer, SC;Emerson, D;Megonigal, JP
通讯作者:
Megonigal, JP