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1989 (1)
1Author    Berthold Scheffczyk, IngoD. Am, L.Horst GrimmeRequires cookie*
 Title    PS IIa/ß Heterogeneity during the Cell Cycle of the Unicellular Green Alga Chlorella fusca  
 Abstract    Fluorescence induction m easurem ents indicate a PS II(L ,p heterogeneity in the unicellular green alga Chlorella fusca. Under normal light the relative amount of PS II" is decreasing from 63% to 43% during the first 8 h o f the cell cycle. The rate constant ka shows a concom itant decrease by 20% in the first 4 h. The relative am ount and antenna size of PS IIa is restored in the dark. In contrast, PS II(rcentres show the sam e rate constant during the whole cell cycle. Under low light ka is increased by approximately 30% over the cell cycle, whereas no change o f kp is observed. It is concluded that the PS II organization of Chlorella is changed both during the cell cycle and the adaptation to light intensity by a com plex regulation (i) involving the antenna size o f a-centres and (ii) changing the quantitative relationship of fast and slow reaction centres. 
  Reference    Z. Naturforsch. 44c, 243 (1989); received Septem ber 14/Decem ber 22 1988 
  Published    1989 
  Keywords    PS II H eterogeneity, Green A lgae, Chlorella fusca, Cell Cycle, Light Intensity 
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 TEI-XML for    default:Reihe_C/44/ZNC-1989-44c-0243.pdf 
 Identifier    ZNC-1989-44c-0243 
 Volume    44