The co-culture of Acidithiobacillus ferrooxidans and Acidiphilium acidophilum enhances the growth, iron oxidation, and CO fixation
Archives of Microbiology, ISSN: 0302-8933, Vol: 193, Issue: 12, Page: 857-866
2011
- 58Citations
- 47Captures
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Metrics Details
- Citations58
- Citation Indexes58
- 58
- CrossRef31
- Captures47
- Readers47
- 47
Article Description
Although the synergetic interactions between chemolithoautotroph Acidithiobacillus ferrooxidans and heterotroph Acidiphilium acidophilum have drawn a share of attention, the influence of Aph. acidophilum on growth and metabolic functions of At. ferrooxidans is still unknown on transcriptional level. To assess this influence, a co-culture composed by At. ferrooxidans and Aph. acidophilum was successfully acclimated in this study. Depending on the growth dynamics, At. ferrooxidans in co-culture had 2 days longer exponential phase and 5 times more cell number than that in pure culture. The ferrous iron concentration in culture medium and the expression of iron oxidation-related genes revealed that the energy acquisition of At. ferrooxidans in co-culture was more efficient than that in pure culture. Besides, the analysis of CO fixation-related genes in At. ferrooxidans indicated that the second copy of RuBisCO-encoding genes cbbLS-2 and the positive regulator-encoding gene cbbR were up-regulated in co-culture system. All of these results verified that Aph. acidophilum could heterotrophically grow with At. ferrooxidans and promote the growth of it. By means of activating iron oxidation-related genes and the second set of cbbLS genes in At. ferrooxidans, the Aph. acidophilum facilitated the iron oxidation and CO fixation by At. ferrooxidans. © 2011 Springer-Verlag.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=82355169844&origin=inward; http://dx.doi.org/10.1007/s00203-011-0723-8; http://www.ncbi.nlm.nih.gov/pubmed/21691775; http://link.springer.com/10.1007/s00203-011-0723-8; https://dx.doi.org/10.1007/s00203-011-0723-8; https://link.springer.com/article/10.1007%2Fs00203-011-0723-8; http://www.springerlink.com/index/10.1007/s00203-011-0723-8; http://www.springerlink.com/index/pdf/10.1007/s00203-011-0723-8
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