Dark Hydrogen Evolution and Adenine Nucleotides of Subtropical Marine Unicellular Green Algae during Anaerobic Incubation

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概要

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• The relation between dark anaerobic hydrogen (H_2) evolution of marine unicellular green algae and the energetic state of the cells, as revealed by adenine nucleotide (AN) levels, was studied. One of the 4 investigated strains produced H_2 continuously for 48 h and maintained its adenylate energy charge (EC) at about 0.6, whereas the H_2 evolution of the other strains stopped within 24 h and their EC decreased to low values. Prolonged aerobic preincubation resulted in reduced H_2 evolution and a stronger decrease in EC during subsequent anaerobiosis. Among cultures of the same strain, H_2 evolution was correlated with the initial pool levels of total AN and chlorophyll and with the ATP level and EC during anaerobiosis. These results indicate a dependence between H_2 evolution and capacity for starvation. EC was not affected by complete inhibition of H_2 evolution by carbon monoxide in one strain but was significantly lowered in another strain. This difference between the two strains is interpreted as reflecting a different dependence on, or utilization of, alternative pathways for disposal of electrons during fermentation, although H_2 evolution apparently played a minor and non-essential role in the dark anaerobic fermentation.

• 日本植物生理学会の論文

著者

• Mitsui Akira

  School Of Marine And Atmospheric Science University Of Miami

• Kumazawa Shuzo

  School Of Marine And Atmospheric Science University Of Miami:(present)institute Of Oceanic Research

• Skjoldal Hein

  School Of Marine And Atmospheric Science University Of Miami:(present)institute Of Marine Research D

関連論文

• Effect of O_2 Concentration on Dark H_2 Oxidation in Whole Cells of a Marine Sulfur Photosynthetic Bacterium (Chromatium sp. Strain Miami PBS 1071)
• Dark Hydrogen Evolution and Adenine Nucleotides of Subtropical Marine Unicellular Green Algae during Anaerobic Incubation

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