Carotenoids provide the major antioxidant defence in the globally significant N2-fixing marine cyanobacterium Trichodesmium.

@article{Kelman2009CarotenoidsPT,
  title={Carotenoids provide the major antioxidant defence in the globally significant N2-fixing marine cyanobacterium Trichodesmium.},
  author={Dovi Kelman and Ami Ben-Amotz and Ilana Berman-Frank},
  journal={Environmental microbiology},
  year={2009},
  volume={11 7},
  pages={1897-908}
}
Photosynthetic oxygen-evolving microorganisms contend with continuous self-production of molecular oxygen and reactive oxygen species. The deleterious effects of reactive oxygen species are exacerbated for cyanobacterial nitrogen-fixers (diazotrophs) due to the innate sensitivity of nitrogenase to oxygen. This renders incompatible the processes of oxygen-evolving photosynthesis and N-fixation. We examined total antioxidative potential of various diazotrophic and non-diazotrophic cyanobacteria… CONTINUE READING
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