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1980 (1)
1Author    E. F. Elstner, E. Lengfelder, G. KwiatkowskiRequires cookie*
 Title    Paraquat-Catalyzed Photodestructions in Subchloroplast Particles are Independent on Photosynthetic Electron Transport  
 Abstract    Light dependent ethane form ation and chlorophyll bleaching in isolated chloroplast lamellae are enhanced by either methylviologen or a-linolenic acid. Both ethane formation and chloro­ phyll bleaching are also enhanced in chloroplast particles deficient in photosynthetic electron transport, e. g. after aging, heat treatm ent or digitonin fragmentation. Ethane form ation by sub­ chloroplast particles from endogenous substrates in the presence of methylviologen is inhibited by superoxide dism utase or by a penicillam ine copper complex exhibiting superoxide dismutase activity whereas chlorophyll bleaching is enhanced by superoxide dismutase — active substances. Maximal rates o f ethane form ation in subchloroplast particles are observed when more than 50% of the chlorophyll is bleached and continues after 98% chlorophyll bleaching. This result indi­ cated that methylviologen -stim ulated ethane production in subchloroplast particles is not de­ pendent on photosynthetic electron transport but involves "activated oxygen" — species like the superoxide radical ion, generated by a light receptor derived from the pigmentsystem o f photo­ system I or activated after its destruction. 
  Reference    Z. Naturforsch. 35c, 303—307 (1980); received D ecem ber 12 1979 
  Published    1980 
  Keywords    Ethane Form ation, Chlorophyll Bleaching, Oxygen Radicals, Fatty Acid Peroxidation 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0303.pdf 
 Identifier    ZNC-1980-35c-0303 
 Volume    35