The CO 2 concentrating mechanism and photosynthetic carbon assimilation in limiting CO 2 : how Chlamydomonas works against the gradient
| Autor: | Martin H. Spalding, Yingjun Wang, Dan J. Stessman |
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| Rok vydání: | 2015 |
| Předmět: |
Chloroplasts
Acclimatization Plant Science Photosynthesis Thylakoids chemistry.chemical_compound Cytosol Total inorganic carbon Gene Expression Regulation Plant Genetics Carbonic Anhydrases Plant Proteins biology Cell Membrane Chlamydomonas Carbon fixation RuBisCO Assimilation (biology) Cell Biology Carbon Dioxide biology.organism_classification Carbon chemistry Biochemistry Carbon dioxide biology.protein Photorespiration Transcription Factors |
| Zdroj: | The Plant Journal. 82:429-448 |
| ISSN: | 1365-313X 0960-7412 |
| DOI: | 10.1111/tpj.12829 |
| Popis: | The CO2 concentrating mechanism (CCM) represents an effective strategy for carbon acquisition that enables microalgae to survive and proliferate when the CO2 concentration limits photosynthesis. The CCM improves photosynthetic performance by raising the CO2 concentration at the site of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), simultaneously enhancing carbon fixation and suppressing photorespiration. Active inorganic carbon (Ci) uptake, Rubisco sequestration and interconversion between different Ci species catalyzed by carbonic anhydrases (CAs) are key components in the CCM, and an array of molecular regulatory elements is present to facilitate the sensing of CO2 availability, to regulate the expression of the CCM and to coordinate interplay between photosynthetic carbon metabolism and other metabolic processes in response to limiting CO2 conditions. This review intends to integrate our current understanding of the eukaryotic algal CCM and its interaction with carbon assimilation, based largely on Chlamydomonas as a model, and to illustrate how Chlamydomonas acclimates to limiting CO2 conditions and how its CCM is regulated. |
| Databáze: | OpenAIRE |
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