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1976 (2)
1Author    G. Ünter, D. Ö. RinRequires cookie*
 Title    The Effect of Deoxycholate-Treatment to the Photoreactions of the Active Pigments in Photosynthesis  
 Abstract    In the heavy fraction of deoxycholate-treated spinach chloroplasts the chlorophyll an activity is high and the chlorophyll a\ activity is low when no artificial electron donor is added. The addition of the photosystem I donor system N-methyl-phenazonium sulphate plus sodium ascorbate (PMS + Asc) leads to a complete reactivation of the chlorophyll ai reaction. The addition of the photo­ system II donor system p-benzohydroquinone plus sodium ascorbate (HQ + Asc) leads to an inhibi­ tion of the chlorophyll an activity. From these results we conclude: 1. Besides an interruption of the linear electron flow between the two photosystems deoxycholate-treatment leads to a block of the electron flow from water to photosystem II. 2. In deoxycholate-treated chloroplasts the linear electron flow in photosystem II just like in Tris­ washed, heat-treated or aged chloroplasts, is replaced by a cyclic one. 
  Reference    (Z. Naturforsch. 31c, 64 [1976]; received August 19 1975) 
  Published    1976 
  Keywords    Photosynthesis, Deoxycholate-Treatment, Electron Transport, Flash Excitation 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0064.pdf 
 Identifier    ZNC-1976-31c-0064 
 Volume    31 
2Author    G. Ünter, D. Ö. RinRequires cookie*
 Title    The Chlorophyll an Reaction in Trypsin-Treated Spinach Chloroplasts in the Presence of Potassium Ferricyanide  
 Abstract    In trypsin-treated spinach chloroplasts there is no linear electron flow from water to potassium ferricyanide. The chlorophyll a n reaction, however, is still active but insensitive to 3-(3,4-dichloro-phenyl)-l,l-dimethylurea. From this we conclude that ferricyanide and trypsin together stimulate a mini-cycle in photosystem II. 
  Reference    (Z. Naturforsch. 31c, 78 [1976]; received July 29/October 15 1975) 
  Published    1976 
  Keywords    Photosynthesis, Photosystem II, Trypsin-Treatment, Flash Excitation 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0078.pdf 
 Identifier    ZNC-1976-31c-0078 
 Volume    31