Treatment with moderate concentrations of NaHSO₃ enhances photobiological H₂ production in the cyanobacterium Anabaena sp. strain PCC 7120

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• 作者：Lianjun Wang ; Ming Chen ; Lanzhen Wei ; Fudan Gao ; Zhongxian Lv ; Quanxi Wang ; Weimin Ma
• 关键词：Anabaena sp. strain PCC 7120 ; Photobiological H₂ production ; NaHSO₃
• 刊名：International Journal of Hydrogen Energy
• 出版年：2010
• 出版时间：December 2010
• 年：2010
• 卷：35
• 期：23
• 页码：12777-12783
• 全文大小：723 K

文摘

In cyanobacteria, treatment with low concentrations of NaHSO₃ can enhance photosynthetic efficiency, whereas NaHSO₃ in high amounts often inhibits cell growth and photosynthesis may even cause death. In the present study, our results showed that treatment with moderate concentrations of NaHSO₃ considerably improved the yield of photobiological H₂ production in the filamentous N₂-fixing cyanobacterium Anabaena sp. strain PCC 7120. Under steady state conditions, the accumulated H₂ levels in cells treated with 1 mM NaHSO₃ were approximately 10 times higher than that in untreated cells. Such improvement occurred in heterocysts and was most likely caused by increases in the expression and activity of nitrogenase. The effects of treatment with low, moderate, and high concentrations of NaHSO₃ in cyanobacteria were proposed on the basis of the results obtained in the present study and from previous knowledge.