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  • 1 Laboratoire de Bioénergétique et Ingénierie des Protéines IBSM-CNRS 31 ch. Joseph Aiguier 13009 Marseille France
  • 2 Faculté de Pharmacie Laboratoire de Chimie Générale et Physico-Chimie de l"Environnement 27 bd. Jean Moulin 13385 Marseille Cedex 05 France
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Abstract  

The effect of Cr(VI) on Desulfovibrio vulgaris strain Hildenborough bioenergetic metabolism was monitored by microcalorimetry and the concomitant reduction of this metal was studied. Results showed that Cr(VI) is reduced by the bacterium and that the bacterial growth is altered, involving a strong modification of the metabolism of the bacteria. An absence of correlation between Cr(VI) reduction and cell growth is observed, suggesting that Cr(VI) does not yield energy to support anaerobic growth. The analysis of the enzymatic characteristics of Cr(VI) reduction are in progress.