C₄ gene induction during de-etiolation evolved through changes in cis to allow integration with ancestral C₃ gene regulatory networks.

ABSTRACT: C₄ photosynthesis has evolved by repurposing enzymes found in C₃ plants. Compared with the ancestral C₃ state, accumulation of C₄ cycle proteins is enhanced. We used de-etiolation of C₄ Gynandropsis gynandra and C₃ Arabidopsis thaliana to understand this process. C₄ gene expression and chloroplast biogenesis in G. gynandra were tightly coordinated. Although C₃ and C₄ photosynthesis genes showed similar induction patterns, in G. gynandra, C₄ genes were more strongly induced than orthologs from A. thaliana. In vivo binding of TGA and homeodomain as well as light-responsive elements such as G- and I-box motifs were associated with the rapid increase

SUBMITTER: Singh P 

PROVIDER: S-EPMC10058240 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature