Two opposing redox signals mediated by 2-cys peroxiredoxin shape the redox proteome during photosynthetic induction.

ABSTRACT: Photosynthetic induction, characterized by the lag in CO₂ assimilation rates during transition from darkness to light, has traditionally been attributed to Rubisco activase activity and stomatal opening. Yet, the faster induction of photosynthesis in the 2-Cys peroxiredoxins (Prxs) mutant (2cpab) suggested a role for oxidative signals in regulating photosynthetic rates, although the underlying molecular mechanism remains unclear. SPEAR, a redox proteomics approach, was used to systematically map redox changes occurring during photosynthesis induction and to unravel the role of 2-Cys Prxs in shaping these redox alterations. No significant difference was observed in protein expression levels between WT and 2cpab plants, suggesting that protein abundance does not account for the 2c

SUBMITTER: Doron S 

PROVIDER: S-EPMC12359254 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature