Regulation of Photosynthetic CO2 Fixation
In any consideration of the rate and efficiency of nitrogen utilization by plants, it is obvious that attention must be paid to photosynthetic CO2 fixation. Photosynthetic CO2 fixation is both complementary to and competitive with nitrogen metabolism. Photosynthetic electron transport provides the energy for nitrogen metabolism, directly or indirectly; and CO2 fixation provides the carbon skeletons for amino acid biosynthesis. On the other hand, CO2 fixation is directly competitive with nitrogen metabolism, especially nitrite reduction and amino acid synthesis, for photosynthetic reducing equivalents and ATP.
KeywordsMethyl Viologen Assay Medium Nitrite Reduction Intact Chloroplast FBPase Activation
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