Effect of oxygen on formation and structure of Azotobacter vinelandii alginate and its role in protecting nitrogenase.

@article{Sabra2000EffectOO,
  title={Effect of oxygen on formation and structure of Azotobacter vinelandii alginate and its role in protecting nitrogenase.},
  author={Wael Sabra and A P Zeng and Heinrich Luensdorf and W-D. Deckwer},
  journal={Applied and environmental microbiology},
  year={2000},
  volume={66 9},
  pages={4037-44}
}
The activity of nitrogenase in the nitrogen-fixing bacterium Azotobacter vinelandii grown diazotrophically under aerobic conditions is generally considered to be protected against O(2) by a high respiration rate. In this work, we have shown that a high rate of respiration is not the prevailing mechanism for nitrogenase protection in A. vinelandii grown in phosphate-limited nitrogen-free chemostat culture. Instead, the formation of alginate appeared to play a decisive role in protecting the… CONTINUE READING