Abstract
The photosynthetic nonsulfur purple bacterium Rhodopseudomonas capsulata strain E1F1 assimilated nitrate or nitrite only in illuminated cultures under anaerobic conditions. The bacterial cells grew aerobically in the dark only when ammonia or other forms of reduced nitrogen were present in the medium. However, nitrate reductase was detected either in light-anaerobic or in dark-aerobic conditions upon addition of nitrate to the media. Changes from light-anaerobic to dark-aerobic conditions and vice versa markedly influenced growth, nitrate uptake and the nitrate reductase levels. Growth on nitrate in the light and nitrate reductase activity were dependent on the presence of molybdenum in the medium whereas the addition of tungstate inhibited both growth and enzyme activity.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
