Bicarbonate-stimulated dark fermentative growth of a phototrophic purple nonsulfur bacterium |
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Authors: | Akira Hiraishi |
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Institution: | Groupe d'Etudes et de Recherches Appliquées Pluridisciplinaires, UA CNRS 461, Universitéde Perpignan, F-66025 Perpignan Cedex, France;Laboratoire de Physiologie Végétale, UA CNRS 565, Universitéde Perpignan, F-66025 Perpignan Cedex, France |
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Abstract: | Abstract Two strains of soil bacteria, Pseudomonas cepacia and Pseudomonas alcaligenes , which degrade herbicides have been isolated. Both contain plasmids whose presence is correlated with the capacity to metabolise phenylcarbamates. Successive subculturing in the absence of herbicide or curing my mitomycin C leads to the loss of small plasmids from both strains associated with modifications in herbicide degradation. Further, the level of the smallest plasmid of P. cepacia increases when CIPC is the sole carbon source. This plasmid hybridises to several larger molecular species, suggesting a certain degree of structural rearrangement in response to the presence of the herbicide. |
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Keywords: | Pseudomonas Herbicide degradation Plasmid curing |
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