Ecology and evolution of bacterial microdiversity

Using high resolution molecular fingerprinting techniques like random amplification of polymorphic DNA, repetitive extragenic palindromic PCR and multilocus enzyme electrophoresis, a high bacterial diversity below the species and subspecies level (microdiversity) is revealed. It became apparent that...

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Bibliographic Details
Published in:FEMS microbiology reviews 2000-12, Vol.24 (5), p.647-660
Main Authors: Schloter, Michael, Lebuhn, Michael, Heulin, Thierry, Hartmann, Anton
Format: Article
Language:English
Subjects:
Bacteria - classification
Bacteria - genetics
Bacteria - growth & development
Burkholderia
Burkolderia
Ecosystem
Escherichia coli
Evolution, Molecular
Frankia
Helicobacter
Helicobacter pylori
Microbial ecology
Microbial evolution
Microdiversity
Ochrobactrum
Paenibacillus
Plant Diseases - microbiology
Plant Roots - microbiology
Plants - microbiology
Pseudomonas
Ralstonia
Rhizobium
Soil Microbiology
Stenotrophomonas
Whole genome analysis
Xanthomonas
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Summary:Using high resolution molecular fingerprinting techniques like random amplification of polymorphic DNA, repetitive extragenic palindromic PCR and multilocus enzyme electrophoresis, a high bacterial diversity below the species and subspecies level (microdiversity) is revealed. It became apparent that bacteria of a certain species living in close association with different plants either as associated rhizosphere bacteria or as plant pathogens or symbiotic organisms, typically reflect this relationship in their genetic relatedness. The strain composition within a population of soil bacterial species at a given field site, which can be identified by these high resolution fingerprinting techniques, was markedly influenced by soil management and soil features. The observed bacterial microdiversity reflected the conditions of the habitat, which select for better adapted forms. In addition, influences of spatial separation on specific groupings of bacteria were found, which argue for the occurrence of isolated microevolution. In this review, examples are presented of bacterial microdiversity as influenced by different ecological factors, with the main emphasis on bacteria from the natural environment. In addition, information available from some of the first complete genome sequences of bacteria ( Helicobacter pylori and Escherichia coli) was used to highlight possible mechanisms of molecular evolution through which mutations are created; these include mutator enzymes. Definitions of bacterial species and subspecies ranks are discussed in the light of detailed information from whole genome typing approaches.
ISSN:0168-6445
1574-6976
DOI:10.1016/S0168-6445(00)00051-6