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1984 (1)
1Author    K. H. GrumbachRequires cookie*
 Title    Herbicides which Interfere with the Biosynthesis of Carotenoids and Their Effect on Pigment Excitation, Chlorophyll Fluorescence and Pigment Composition of the Thylakoid Membrane  
 Abstract    Plants grown in the presence o f the herbicides assayed synthesized chlorophylls during growth at low fluence rates. Subsequent irradiation with higher fluence rates o f red light induced a strong chlorosis with SAN 6706 being a much stronger herbicide than J 852 or am ino-triazole. All herbicides assayed also changed the content and com position o f chlorophylls, carotenoids and pigment-protein-complexes o f the thylakoid m em brane and therefore the pigm ent excitation and chlorophyll fluorescence em ission spectra o f the plastid. W ith increasing herbicide toxicity the main characteristic em ission bands at 690 and 730 nm disappeared and new em ission bands at 715 (J 852) and 700 nm (SA N 6706) appeared. Such "artificial" m em branes with a changed pigment composition were very susceptible to light. Presented data m ay be taken as evidence, that the lack o f photoprotective cyclic carotenoids caused by the specific action o f a bleaching herbicide is the primary event that m ay lead to a disturbed form ation o f the thylakoid membrane and its destruction by light and oxygen. 
  Reference    Z. Naturforsch. 39c, 455—458 (1984); received N ovem ber 29 1983 
  Published    1984 
  Keywords    Bleaching Herbicides, Carotenoids, Chlorophylls, F luorescence, Pigm ent Excitation 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0455.pdf 
 Identifier    ZNC-1984-39c-0455 
 Volume    39