Characterization of H2 photoproduction by a new marine green alga, Platymonas helgolandica var. tsingtaoensis

Yanting Zhang, Xiaolei Fan, Zhiman Yang, Huanyu Wang, Dawei Yang and Rongbo Guo

Applied Energy, 2012, vol. 92, issue C, 38-43

Abstract: A significant improvement in H2 photoproduction was observed in the marine green alga Platymonas helgolandica var. tsingtaoensis in the presence of the uncoupler carbonyl cyanide m-chlorophenylhydrazone (CCCP). The addition of 15μM CCCP to algal cultures led to a 260-fold increase in H2 production compared with a negligible volume of H2 gas produced without CCCP. The photosystem (PS) II photochemical activity was shown to be completely inhibited in the presence of CCCP under illumination. The added herbicide 3-(3,4-dichlorophenyl)-1, 1-dimethylurea further resulted in a twofold increase in H2 photoproduction in the CCCP-treated cultures. These results demonstrated the absence of PSII-dependent pathway of H2 photoproduction. H2 production essentially depends on electrons donated to the hydrogenase by the endogenous substrate catabolism in CCCP-treated P. helgolandica var. tsingtaoensis. An analysis of the O2-tolerance of the hydrogenase of P. helgolandica var. tsingtaoensis suggested that this enzyme may belong to the class [FeFe]-hydrogenase.

Keywords: P. helgolandica var. tsingtaoensis; H2 photoproduction; PSII activity; CCCP; Hydrogenase (search for similar items in EconPapers)
Date: 2012
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Citations: View citations in EconPapers (4)

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DOI: 10.1016/j.apenergy.2011.09.044

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