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Physiological Competence of Atrazine-Resistant Strains of the Photosynthetic Bacterium Rhodobacter sphaeroides (Rhodospirillaceae)

  • Alfred E. Brown (a1), Bryan Truelove (a1), Claudia T. Highfill (a1) and Scott G. Smith (a1)


Two parameters of physiological competence, rate of CO2 fixation and intraspecific competitiveness, were determined for one or more atrazine-resistant isolates of the photosynthetic bacterium Rhodobacter sphaeroides. Measured over a 2-h period under optimal conditions, two of the resistant isolates fixed CO2 at a greater rate than the atrazine-susceptible, wild-type organism. In a mixed culture study, an atrazine-resistant strain was able to grow and compete successfully with the susceptible, wild-type strain for at least 14 days.



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Physiological Competence of Atrazine-Resistant Strains of the Photosynthetic Bacterium Rhodobacter sphaeroides (Rhodospirillaceae)

  • Alfred E. Brown (a1), Bryan Truelove (a1), Claudia T. Highfill (a1) and Scott G. Smith (a1)


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