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Role of transmembrane electrical potential on cadmium fixation by a marine pseudomonad
G N Flatau1, R L Clément, F Mahdyoun
1Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 303 Mer et Santé, Nice, France.
Research in Microbiology
|October 1, 1989
Abstract:
The role of cellular energy, and mainly that of electrical transmembrane potential, in cadmium fixation by a marine pseudomonad suspended in a mineral medium was investigated by studying the effects of ionophores. Although fixation of cadmium by cells was generally less when respiratory activity was inhibited, it was not affected by a reduction of the transmembrane electrical potential delta psi in mureinoplasts. These observations strongly suggest that cadmium fixation in this isolate was not the result of a delta psi-dependent active transport.