Transcript profiling indicates that the absence of PsbO affects the coordination of C and N metabolism in Synechocystis sp. PCC 6803

Physiologia Plantarum
Sarah SchriekKlaus-Peter Michel

Abstract

Transcript profiling of nitrate-grown Synechocystis sp. PCC 6803 PsbO-free mutant cells in comparison to wild-type (WT) detected substantial deviations. Because we had previously observed phenotypical differences between Synechocystis sp. PCC 6803 WT and its corresponding PsbO-free mutant when cultivated with l-arginine as sole N source and a light intensity of 200 mumol photons m(-2) s(-1), we also performed transcript profiling for both strains grown either with nitrate or with l-arginine as sole N source. We observed a total number of 520 differentially regulated transcripts in Synechocystis WT because of a shift from nitrate- to l-arginine-containing BG11 medium, while we detected only 13 differentially regulated transcripts for the PsbO-free mutant. Thus, the PsbO-free Synechocystis mutant had already undergone a preconditioning process for growth with l-arginine in comparison to WT. While Synechocystis WT suffered from growth with l-arginine at a light intensity of 200 mumol photons m(-2) s(-1), the PsbO-free mutant developed only a minor stress phenotype. In summary, our results suggest that the absence of PsbO in Synechocystis affects the coordination of photosynthesis/respiration and l-arginine metabolism through compl...Continue Reading

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Citations

Feb 14, 2009·Journal of Experimental Botany·Sarah SchriekKlaus-Peter Michel
May 5, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yuma TokumaruHiroshi Shimizu

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