Temperature dependence of photosynthesis and thylakoid lipid composition in the red snow alga Chlamydomonas cf. nivalis (Chlorophyceae)
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
- Keywords
- Chlamydomonas, electron transfer, phosphatidylglycerol, photosystem II, snow algae, temperature adaptation,
- MeSH
- Quinones metabolism MeSH
- Chlamydomonas growth & development metabolism MeSH
- Photosynthesis * MeSH
- Photosystem II Protein Complex chemistry metabolism MeSH
- Adaptation, Physiological MeSH
- Intracellular Membranes metabolism MeSH
- Conserved Sequence MeSH
- Oxygen metabolism MeSH
- Lipids MeSH
- Lipid Metabolism MeSH
- Molecular Sequence Data MeSH
- Cold Temperature MeSH
- Amino Acid Sequence MeSH
- Temperature MeSH
- Thermodynamics MeSH
- Electron Transport MeSH
- Thylakoids metabolism MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Quinones MeSH
- Photosystem II Protein Complex MeSH
- Oxygen MeSH
- Lipids MeSH
Here, we report an effect of short acclimation to a wide span of temperatures on photosynthetic electron transfer, lipid and fatty acid composition in the snow alga Chlamydomonas cf. nivalis. The growth and oxygen evolution capacity were low at 2 °C yet progressively enhanced at 10 °C and were significantly higher at temperatures from 5 to 15 °C in comparison with the mesophilic control Chlamydomonas reinhardtii. In search of the molecular mechanisms responsible for the adaptation of photosynthesis to low temperatures, we have found unprecedented high rates of QA to QB electron transfer. The thermodynamics of the process revealed the existence of an increased structural flexibility that we explain with the amino acid changes in the D1 protein combined with the physico-chemical characteristics of the thylakoid membrane composed of > 80% negatively charged phosphatidylglycerol.
References provided by Crossref.org
Phylogeny and lipid profiles of snow-algae isolated from Norwegian red-snow microbiomes
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AHB82278, KF702330
