With the rapid development of productivity and the continuous improvement of modernization levels, global energy consumption has risen sharply, leading to the global energy crisis and rising energy prices. It has become particularly important to find alternative energy sources. Hydrogen is an ideal clean and renewable energy source with huge commercial potential. The use of biohydrogen as an energy source has been applied in many fields. Therefore, many scientific studies have been committed to increasing the production of biohydrogen through various means. Microalgae is a facultative aerobic organism. It can convert solar energy into biohydrogen under anaerobic conditions. The electrons and protons produced by photosynthesis can be used to produce hydrogen and biofuel through hydrogenase, which can be used by seawater, CO2 and sunlight To achieve this "biological hydrogen production" process.
The research team of Yang Wenqiang, Institute of Botany, Chinese Academy of Sciences has long been engaged in the research on the regulation mechanism of Chlamydomonas photosynthesis metabolism. Recently, the team was invited to write a review article, which systematically summarized the latest progress of microalgae hydrogen production and its regulation mechanism. This review introduces the research history of hydrogen production by microalgae (including cyanobacteria and green algae), the characteristics of nitrogenase and hydrogenase, hydrogen production mechanism, technological progress, and enzymatic, genetic and metabolic engineering methods in improving hydrogen production by microalgae Applications. Among them, the process of regulating the production of hydrogen by microalgae was highlighted, and the regulation mode of key enzymes in the fermentation and metabolic pathway of Chlamydomonas reinhardtii was summarized. The main challenges and obstacles have put forward the prospects for the future research direction of microalgae hydrogen production.
The review was published recently in the international academic journal Small Methods. Yang Wenqiang's current master student Wang Yue and Ph.D. student Yang Huanling are co-first authors, assistant researcher Tu Wenfeng and researcher Yang Wenqiang are co-corresponding authors. The research was supported by the Ministry of Science and Technology's key research and development plan, the National Natural Science Foundation of China, and youth projects.
Figure: Microalgae hydrogen production pathway under different conditions of Chlamydomonas.
A, PSII-dependent hydrogen production pathway. B, PSII does not depend on the hydrogen production pathway. C, Hydrogen production pathway under sulfur-deficient conditions. D, Hydrogen production pathway under dark anaerobic conditions.
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