Unraveling the mechanism of high-efficiency CO fixation in the high CO tolerant Oedocladium carolinianum: Synergistic enhancement of photosynthetic light conversion and carbon assimilation.
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| Autores principales: | , , , , |
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Photochemistry and photobiology
2026
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| Acceso en línea: | |
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| _version_ | 1868266039388667904 |
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| author | Cui, Danni Han, Ruoqi Zhang, Litao Yu, Wenjie Liu, Jianguo |
| author_facet | Cui, Danni Han, Ruoqi Zhang, Litao Yu, Wenjie Liu, Jianguo Cui, Danni Han, Ruoqi Zhang, Litao Yu, Wenjie Liu, Jianguo |
| collection | PubMed - marine biology |
| contents | Unraveling the mechanism of high-efficiency CO fixation in the high CO tolerant Oedocladium carolinianum: Synergistic enhancement of photosynthetic light conversion and carbon assimilation. Cui, Danni Han, Ruoqi Zhang, Litao Yu, Wenjie Liu, Jianguo The filamentous microalga Oedocladium carolinianum, capable of synthesizing high-value compounds like astaxanthin, represents a promising candidate for integrated carbon capture and biorefinery. This study investigated its physiological and molecular responses to a wide range of CO concentrations (0.04%-20%) at an aeration rate of 500 mL min, without CO addition during the night, to assess carbon fixation efficiency and application potential. Results demonstrated that O. carolinianum possesses remarkable tolerance to high CO levels. The optimal 5% CO treatment yielded the highest average carbon fixation rate of 243.51 mg L d. Physiologically, CO enrichment markedly enhanced photosynthetic performance: it boosted the efficiency of Photosystem II, accelerated electron transport rates, and concurrently reduced respiratory energy loss. Furthermore, CO aeration stabilized the culture pH within a neutral range by counteracting photosynthetic alkalinization, thereby promoting algal growth. Transcriptomic analysis revealed that optimal CO concentrations (5%-10%) systematically upregulated genes encoding key components of the photosynthetic apparatus-including antenna proteins, both photosystems, and the Calvin cycle enzymes-thereby orchestrating a coordinated enhancement of carbon assimilation metabolism. This study elucidates the integrated physiological and molecular basis of efficient carbon fixation in O. carolinianum under elevated CO, supporting its potential application in industrial flue gas remediation and sustainable natural astaxanthin coproduction. |
| format | Artículo científico |
| id | pubmed_42266099 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Photochemistry and photobiology |
| record_format | pubmed |
| spellingShingle | Unraveling the mechanism of high-efficiency CO fixation in the high CO tolerant Oedocladium carolinianum: Synergistic enhancement of photosynthetic light conversion and carbon assimilation. Cui, Danni Han, Ruoqi Zhang, Litao Yu, Wenjie Liu, Jianguo Unraveling the mechanism of high-efficiency CO fixation in the high CO tolerant Oedocladium carolinianum: Synergistic enhancement of photosynthetic light conversion and carbon assimilation. Cui, Danni Han, Ruoqi Zhang, Litao Yu, Wenjie Liu, Jianguo The filamentous microalga Oedocladium carolinianum, capable of synthesizing high-value compounds like astaxanthin, represents a promising candidate for integrated carbon capture and biorefinery. This study investigated its physiological and molecular responses to a wide range of CO concentrations (0.04%-20%) at an aeration rate of 500 mL min, without CO addition during the night, to assess carbon fixation efficiency and application potential. Results demonstrated that O. carolinianum possesses remarkable tolerance to high CO levels. The optimal 5% CO treatment yielded the highest average carbon fixation rate of 243.51 mg L d. Physiologically, CO enrichment markedly enhanced photosynthetic performance: it boosted the efficiency of Photosystem II, accelerated electron transport rates, and concurrently reduced respiratory energy loss. Furthermore, CO aeration stabilized the culture pH within a neutral range by counteracting photosynthetic alkalinization, thereby promoting algal growth. Transcriptomic analysis revealed that optimal CO concentrations (5%-10%) systematically upregulated genes encoding key components of the photosynthetic apparatus-including antenna proteins, both photosystems, and the Calvin cycle enzymes-thereby orchestrating a coordinated enhancement of carbon assimilation metabolism. This study elucidates the integrated physiological and molecular basis of efficient carbon fixation in O. carolinianum under elevated CO, supporting its potential application in industrial flue gas remediation and sustainable natural astaxanthin coproduction. |
| title | Unraveling the mechanism of high-efficiency CO fixation in the high CO tolerant Oedocladium carolinianum: Synergistic enhancement of photosynthetic light conversion and carbon assimilation. |
| url | https://pubmed.ncbi.nlm.nih.gov/42266099/ |