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The co-culture of Acidithiobacillus ferrooxidans and Acidiphilium acidophilum enhances the growth, iron oxidation, and CO2 fixation
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The co-culture of Acidithiobacillus ferrooxidans and Acidiphilium acidophilum enhances the growth, iron oxidation, and CO2 fixation
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Journal Article
The co-culture of Acidithiobacillus ferrooxidans and Acidiphilium acidophilum enhances the growth, iron oxidation, and CO2 fixation
2011
Overview
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
2
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
2
fixation by
At. ferrooxidans
.
Publisher
Springer-Verlag,Springer,Springer Nature B.V
Subject
/ Acidiphilium - growth & development
/ Acidithiobacillus - genetics
/ Acidithiobacillus - growth & development
/ Acidithiobacillus - metabolism
/ Biological and medical sciences
/ Biomedical and Life Sciences
/ Ecology
/ Enzymes
/ Fundamental and applied biological sciences. Psychology
/ Gene Expression Regulation, Bacterial
/ Genes
/ Iron
