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1983 (1)
1Author    H. W. Eißhaar, P. BögerRequires cookie*
 Title    Sulfide Stimulation of Light-Induced Hydrogen Evolution by the Cyanobacterium Nostoc muscorum  
 Abstract    Light-induced hydrogen evolution by the blue-green alga N ostoc muscorum is stim ulated by sulfide with a rate of about 20 (imol H 2 per mg chlorophyll and h our stable for about one day at low light intensities (7 W /m 2). Oxygen evolution does not im pair sulfide-stim ulated hydrogen formation. Increased hydrogen evolution is catalyzed by nitrogenase, its activity is not influenced by sulfide. Apparently, sulfide inhibits the hydrogen-uptake pathw ay(s), thereby increasing net hydrogen evolution. — Furtherm ore, photosynthetic electron flow is inhibited by sulfide, essen­ tially at the oxidizing side o f photosystem II, as was dem onstrated by fluorescence-signal changes. This leads to decreased electron supply o f nitrogenase. Hydrogen production apparently is at optim um when both the effect o f sulfide on photo­ synthesis is moderate and when uptake-hydrogenase activity is abolished. 
  Reference    Z. Naturforsch. 38c, 237 (1983); received D ecem ber 8 1982 
  Published    1983 
  Keywords    Hydrogen Production, Photobiology, Sulfide, Blue-Greens 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/38/ZNC-1983-38c-0237.pdf 
 Identifier    ZNC-1983-38c-0237 
 Volume    38