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

Published online by Cambridge University Press:  12 June 2017

Alfred E. Brown
Affiliation:
Ala. Agric. Exp. Stn. Dep. Bot. and Microbiol., Auburn Univ., AL 36849-5407
Bryan Truelove
Affiliation:
Ala. Agric. Exp. Stn. Dep. Bot. and Microbiol., Auburn Univ., AL 36849-5407
Claudia T. Highfill
Affiliation:
Ala. Agric. Exp. Stn. Dep. Bot. and Microbiol., Auburn Univ., AL 36849-5407
Scott G. Smith
Affiliation:
Ala. Agric. Exp. Stn. Dep. Bot. and Microbiol., Auburn Univ., AL 36849-5407

Abstract

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.

Type
Physiology, Chemistry, and Biochemistry
Copyright
Copyright © 1988 by the Weed Science Society of America 

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