Diversity of the communities of acidophilic chemolithotrophic microorganisms in natural and technogenic ecosystems |
| |
Authors: | T F Kondrat’eva T A Pivovarova I A Tsaplina N V Fomchenko A E Zhuravleva M I Murav’ev V S Melamud A G Bulayev |
| |
Institution: | 1.Winogradsky Institute of Microbiology,Russian Academy of Sciences,Moscow,Russia |
| |
Abstract: | The main representatives of acidophilic chemolithotrophs oxidizing sulfide minerals, ferrous iron, elemental sulfur, and reduced
sulfur compounds and forming microbial communities in the natural and technogenic ecosystems with low pH values and high concentrations
of heavy metal ions are listed. The species and strain diversity of the communities and environmental factors affecting their
composition (temperature, pH value, energy substrate, mineralogical composition of sulfide ore concentrates, the presence
of organic substances, and level of aeration) are analyzed. Involvement of mobile genetic elements (IS elements and plasmids)
in the structural changes of the chromosomal DNA in the course of switching microbial metabolism to the oxidation of new energy
substrates or under increased concentrations of metal ions is shown to be a probable mechanism responsible for the intraspecific
genetic heterogeneity of the populations. Importance of determination of the dominant strains of different microbial species
in the communities and of their physiological peculiarities for stabilization, optimization, and enhancement of efficiency
of biotechnological processes for sulfide mineral oxidation is stressed. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|