C4 grasses employ distinct strategies to acclimate rubisco activase to heat stress.

ABSTRACT: Rising temperatures due to the current climate crisis will soon have devastating impacts on crop performance and resilience. In particular, CO2 assimilation is dramatically limited at high temperatures. CO2 assimilation is accomplished by rubisco, which is inhibited by the binding of inhibitory sugar phosphates to its active site. Plants therefore utilize the essential chaperone rubisco activase (RCA) to remove these inhibitors and enable continued CO2 fixation. However, RCA does not function at moderately high temperatures (42°C), resulting in impaired rubisco activity and reduced CO2 assimilation. We set out to understand temperature-dependent RCA regulation in four different C4 plants, with a focus on the crop plants maize (two cultivars) and sorghum, as well as the model grass Setaria

SUBMITTER: Stainbrook SC 

PROVIDER: S-EPMC11499382 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature