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'Photosystem II' in keywords Facet   section ZfN Section C:Volume 040  [X]
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1985 (2)
1Author    Jean-M Arc, D. Ucruet, Rene ScallaRequires cookie*
 Title    Action of Methylthiopyrimidine Experimental Herbicides as Diuron-Like Inhibitors of Photosynthesis  
 Abstract    Derivatives of 6-chloro-5-methylthiopyrimidines provide potent inhibitors of the photosynthe­ tic electron flow, which act like Diuron on fluorescence induction kinetics and competitively displace it from its binding site. Structure-activity relationships show that, unlike triazines, ac­ tivities of 2-or 4-alkylamino derivatives are restricted by steric hindrances. Decreases in inhibit­ ory activities of these compounds observed in triazine-resistant chloroplasts are lower than de­ creases reported for triazines themselves. 
  Reference    Z. Naturforsch. 40c, 388 (1985); received October 31 1984/February 1 1985 
  Published    1985 
  Keywords    Methylthiopyrimidines, Diuron-Like Inhibitors, Photosynthesis, Structure-Activity Correlations, Photosystem II 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0388.pdf 
 Identifier    ZNC-1985-40c-0388 
 Volume    40 
2Author    M. Tevini, K. PfisterRequires cookie*
 Title    Inhibition of Photosystem II by UV-B-Radiation  
 Abstract    The effect o f UV-B-radiation on PSII activity o f spinach chloroplasts was analyzed by m ea­ suring the integrity o f the herbicide-binding protein (H BP 32), by m easurem ent o f fluorescence induction in the presence o f Diuron (D C M U), and by m athem atical analysis o f the fluorescence induction curves. It was shown that UV-B inactivates the PSII a-centers but not PSII ^-centers. However, the possibility cannot be excluded that in add ition the donor site o f PSII near the reaction center is attacked by UV-B-radiation. 
  Reference    Z. Naturforsch. 40c, 129—133 (1985); received N ovem ber 7 1984 
  Published    1985 
  Keywords    Photosystem II, Variable Fluorescence, R eaction Centers, Spinach Chloroplasts, U V -B-R adiation 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0129.pdf 
 Identifier    ZNC-1985-40c-0129 
 Volume    40