Ser/Thr Protein Kinase SpkI Affects Photosynthetic Efficiency in Synechocystis sp. PCC 6803 upon Salt Stress.

ABSTRACT: High salinity is a common environmental factor that limits productivity and growth for photosynthetic organisms. Here, we identified a mutant defected in gene sll1770, which encodes a Ser/Thr protein kinase SpkI, with a significantly low maximal quantum yield of PSII under high salt condition in Synechocystis sp. PCC 6803. Physiological characterization demonstrated that the ΔspkI mutant had normal growth and photosynthesis under control condition. And a significantly higher NPQ capacity was also observed in ΔspkI when grown under control condition. However, when grown under high salt condition, ΔspkI exhibited apparently slower growth as well as decreased net photosynthesis and PSII activity. Western blot analysis demonstrated that the amount of major ph

SUBMITTER: Wang X 

PROVIDER: S-EPMC9143257 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature