Polyamine patterns in iron- and sulphur-oxidizing bacteria isolated from an Indian copper mine indicate requirement of spermidine for growth under acid conditions |
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Authors: | Joshi NR Agate AD Paknikar KM |
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Institution: | (1) Division of Microbial Sciences, Agharkar Research Institute, G.G. Agarkar Road, Pune, 411 004, India |
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Abstract: | Spermidine was found to be the predominant polyamine in all the acidophilic as well as neutrophilic strains of chemolithotrophic
iron- and sulphur-oxidizing bacteria and associated organotrophic cultures inhabiting a copper mining ecosystem. Adaptation
of neutrophilic Thiobacillus thioparus strain to pH 5.0 was found to increase the spermidine content of the cells 2.3 times while the biomass yield decreased by
50%. However, exogenous supplementation of spermidine could restore the biomass yield to levels obtainable at pH 7.0. These
observations indicate that spermidine plays a significant role in adaptive behaviour of microorganisms in natural ecosystems,
especially under acid conditions.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | Acidiphilium Leptospirillum polyamines spermidine Thiobacillus |
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