Altered Gene Regulatory Networks Are Associated With the Transition From C₃ to Crassulacean Acid Metabolism in Erycina (Oncidiinae: Orchidaceae).

ABSTRACT: Crassulacean acid metabolism (CAM) photosynthesis is a modification of the core C₃ photosynthetic pathway that improves the ability of plants to assimilate carbon in water-limited environments. CAM plants fix CO₂ mostly at night, when transpiration rates are low. All of the CAM pathway genes exist in ancestral C₃ species, but the timing and magnitude of expression are greatly altered between C₃ and CAM species. Understanding these regulatory changes is key to elucidating the mechanism by which CAM evolved from C₃. Here, we use two closely related species in the Orchidaceae, Erycina pusilla (CAM) and Erycina crista-galli (C₃), to conduct comparative transcriptomic analyses across multiple time points. Clustering

SUBMITTER: Heyduk K 

PROVIDER: S-EPMC6360190 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature