Determination of Dissolved Oxygen in Photosynthetic Systems and Protective Strategies Against its Toxic Effects in Cyanobacteria
In the study of the inhibitory effects of oxygen, photosynthetic organisms occupy a unique position. Unlike other biological systems, in which the cells are ordinarily exposed only to ambient O2 levels and often far below, the oxygenic photosynthetic cell produces its own oxygen from within. The O2 concentrations to which photosynthetic organisms are exposed, are often above those in the ambient air. Moreover, the energy utilized by the photosynthetizing cell is that of light. This energy, mainly at the ultraviolet and visible regions, can be harmful by itself, even without the risks involved with activation of molecular oxygen.
KeywordsPhotosynthetic Organism Spin Probe Photosynthetic System Glutathione Disulfide Control Ecological Life Support System
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