Inhibitory effect of molecular hydrogen on C2H2-reducing activity in Anabaena 7120 preilluminated in red or blue light |
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| Authors: | Chen Yin Fan Da-wei |
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| Institution: | (1) Shanghai Institute of Plant Physiology, Academia Sinica, Shanghai, China |
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| Abstract: | Molecular hydrogen inhibits nitrogenase activity in Anabaena pre-illuminated with red or blue light. The inhibitory effect of molecular hydrogen decreased in the presence of oxygen and several electron acceptors. When NH4Cl and urea were added simultaneously with molecular hydrogen, marked synergistic inhibitory effects took place. The inhibitory effect of molecular hydrogen disappeared or was weakened after the suppression of hydrogenase activity. The addition of O2 and electron acceptors to systems showed no enhancing effect on the C2H2-reducing activity. |
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| Keywords: | Anabaena nitrogenase H2-inhibition action of oxygen ammonia-urea-suppression involvement of hydrogenase |
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