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'D 1 Degradation' in keywords Facet   Publication Year 1993  [X]
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1993[X]
1Author    J. SymRequires cookie*
 Title    The Role of D 1* in Light-Induced D 1 Protein Turnover in Leaves  
 Abstract    ea, H arald R . B olh à r-N ord en kam pfb, and C hrista C ritch ley3 Light-induced degradation o f the D 1 protein of photosystem II (PS II) was determined by radioactive pulse-chase labelling experiments in intact leaves o f Schefflera polybotrya. PS II photochemical efficiency was monitored by measuring chlorophyll fluorescence. A significant and consistent decline in the F J F m ratio was taken to indicate photoinhibition. The formation and degradation o f a modified form o f the D 1 protein, D 1*, was different under photoinhibi-tory or non-photoinhibitory light conditions. At photoinhibitory irradiance greater amounts o f D 1 * were formed relative to D 1, and the degradation of D 1* was slower when compared with non-photoinhibitory irradiance. The formation and degradation o f D 1* were therefore shown to be at least partly light intensity dependent. Higher light intensities appeared to slow D 1* degradation, which suggests a modification in PS II turnover properties. 
  Reference    Z. Naturforsch. 48c, 246 (1993); received December 12 1992 
  Published    1993 
  Keywords    Photosynthesis, Photosystem II, Photoinhibition, D 1 Degradation, Chlorophyll Fluorescence 
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 TEI-XML for    default:Reihe_C/48/ZNC-1993-48c-0246.pdf 
 Identifier    ZNC-1993-48c-0246 
 Volume    48