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1979 (1)
1Author    Jürgen Feierabend, Ulrike Schulz, Petra Kemmerich, Theresia LowitzRequires cookie*
 Title    On the Action of Chlorosis-Inducing Herbicides in Leaves  
 Abstract    The chlorosis induced by several different herbicides (group 1: aminotriazole, haloxidine; group 2: Sandoz 6706, difunon) in developing leaves of rye seedlings (Secale cereale L.) growing in light of 5,000 lx was, in addition to the absence of chlorophyll and carotenoids, accompanied by specific deficiencies of the 70 S ribosomes and of both chloroplastic and peroxisomal enzymes as previously described (Plant Physiol. 61, 1017 — 1022 (1978)) while growth and mitochondrial activities were little or not impaired. In dim light (10 lx) chlorophyll was formed and the chloroplastic and peroxisomal enzymes reached activities comparable to those in untreated leaves at 10 lx. Upon exposure to 30,000 lx a rapid bleaching of existing chlorophyll and a rapid inactivation of the plastidic enzyme NADP-glyceraldehydephosphate dehydrogenase occured after treatment with herbicides of group 2 but not in the presence of herbicides of group 1. After all treatments catalase was rapidly inactivated after transfer to high light intensity. The bleaching of chlorophyll and the enzyme inactivations occurred also at 0 °C. In the herbicide-bleached leaves grown at 5,000 lx the in vivo synthesis of (5-aminolevulinic acid was low and in the presence of Sandoz 6706 and difunon the capacity for protochlorophyll (ide) synthesis was largely inactivated. 
  Reference    Z. Naturforsch. 34c, 1036—1039 (1979); received June 5 1979 
  Published    1979 
  Keywords    Chlorosis-Inducing Herbicides, Photooxidation of Chlorophyll, Photoinactivation of Enzymes, Catalase, Cyanide-Insensitive Respiration 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-1036.pdf 
 Identifier    ZNC-1979-34c-1036 
 Volume    34