Mechanisms of carbon dioxide acquisition and CO₂ sensing in marine diatoms: a gateway to carbon metabolism.

ABSTRACT: Diatoms are one of the most successful marine eukaryotic algal groups, responsible for up to 20% of the annual global CO₂ fixation. The evolution of a CO₂-concentrating mechanism (CCM) allowed diatoms to overcome a number of serious constraints on photosynthesis in the marine environment, particularly low [CO₂]_aq in seawater relative to concentrations required by the CO₂ fixing enzyme, ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO), which is partly due to the slow diffusion rate of CO₂ in water and a limited CO₂ formation rate from [Formula: see text] in seawater. Diatoms use two alternative strategies to take up dissolved inorganic carbon (DIC) from the environment: one primarily relies on the direct u

SUBMITTER: Matsuda Y 

PROVIDER: S-EPMC5516112 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature