The contribution of biophysical and biochemical CO₂ concentration mechanisms to the carbon fixation of the green macroalga <i>Ulva prolifera</i>.

ABSTRACT: CO₂ concentration mechanisms (CCMs) are important in maintaining the high efficiency of photosynthesis of marine algae. Aquatic photoautotrophs have two types of CCMs: biophysical CCMs, based on the conversion of inorganic carbon, and biochemical CCMs, based on the formation of C₄ acid intermediates. However, the contribution of biophysical and biochemical CCMs to algal carbon fixation remains unclear. Here, we used ethoxyzolamide (EZ) inhibitors of carbonic anhydrase and 3-mercaptopicolinic acid (MPA) inhibitors for phosphoenolpyruvate carboxykinase to examine the importance of biophysical and biochemical CCMs in photosynthesis of the green macroalga Ulva prolifera. The culture experiments showed that the carbon fixation of the species declined when EZ inhibit

SUBMITTER: Zhang X 

PROVIDER: S-EPMC12413351 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature