The pattern of evolutionary change in bacteria

Hedges, R. W.

doi:10.1038/hdy.1972.4

Cited by 15 publications

(2 citation statements)

References 63 publications

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“…These findings as well as the biochemical and serological differences among these species (Coetzee, 1972) indicate that the respective clusters have been retained in spite of development of other relatively large genetic differences. We agree with Hedges (1972) that the different gene clusters may represent stages in the evolution of an operon, and postulate that selection pressure for this cluster may be connected with methods of arginine and urea catabolism (Prozesky, 1968 b). …”

supporting

confidence: 84%

Arginine Gene Clusters in the Proteus-Providence Group

Prozesky

Grabow

Merwe

et al. 1973

Journal of General Microbiology

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supporting

confidence: 84%

Arginine Gene Clusters in the Proteus-Providence Group

Prozesky

Grabow

Merwe

et al. 1973

Journal of General Microbiology

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“…There are currently two distinct and opposing views on bacterial evolution and speciation (18,31,36). One view holds that most of the bacterial genome evolves vertically in that it is genetically isolated from other bacterial species.…”

mentioning

confidence: 99%

Evolution of alkaline phosphatase in marine species of Vibrio

Woolkalís¹,

Baumann²

1981

J Bacteriol

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The evolution of alkaline phosphatase was studied in marine species of Vibrio. Two antisera prepared against purified alkaline phosphatases from Vibrio splendidus and Vibrio harveyi were used to estimate the amino acid sequence divergence of this enzyme in 51 strains belonging to nine species. The methods used were the quantitative microcomplement fixation technique and the Ouchterlony double-diffusion procedure. There was a high degree of congruence between the measurement of the amino acid sequence divergence of alkaline phosphatase and the percentage of deoxyribonucleic acid homology of the different organisms relative to both reference strains (correlation coefficient of -0.89) as well as between the amino acid sequence divergence of alkaline phosphatase and superoxide dismutase (correlation coefficient of 0.92) relative to V. splendidus. These findings supported the view that the evolution of marine species of Vibrio is primarily vertical and that horizontal evolution (involving genetic exchange between species), if significant, is restricted to a minor fraction of the bacterial genome.

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