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1992 (2)
1Author    Bernd Schneider, Manfred Stock, Gernot Schneider, HorstRobert Schütte, Klaus Schreiber, Angela Brauner, ErnstUlrich KaußmannRequires cookie*
 Title    Metabolism of Amitrole in Apple: I. Soluble Metabolites from Mature Fruits  
 Abstract    Mature fruits from apple trees contain residual amounts of radiolabel derived from soil-ap-plied [3,5-14C]amitrole. This report deals with characterization of the soluble part of this radio­ activity. By GC/MS of suitable derivatives 3-(l,2,4-triazol-l-yl)-2-aminopropionic acid was identi­ fied as a new metabolite of amitrole. Significant parts of radiolabel were incorporated into genuine plant products, indicating liberation of 14C 0 2 from the applied substance followed by reassimilation. Possible pathways of metabolism of amitrole within the system soil/apple tree are discussed. 
  Reference    Z. Naturforsch. 47c, 120—125 (1992); received June 18/October 24 1991 
  Published    1992 
  Keywords    Herbicide, Amitrole, Metabolism, Reassimilation, Structural Elucidation 
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 TEI-XML for    default:Reihe_C/47/ZNC-1992-47c-0120.pdf 
 Identifier    ZNC-1992-47c-0120 
 Volume    47 
2Author    Barbara Schaller, Bernd Schneider, HorstRobert SchütteRequires cookie*
 Title    Metabolism of the Herbicide Bromoxynil in Hordeum vulgare and Stellaria media  
 Abstract    The metabolism of [3,5-14C]3,5-dibromo-4-hydroxybenzonitrile (bromoxynil) was studied in Hordeum vulgare and Stellaria media. In excised barley seedlings the time course of metabolism was followed over 48 h and the distribution of radioactivity to various metabolic fractions measured. The metabolites, sepa­ rated by TLC and HPLC, were identified by chemical and spectrometric methods. Bromo-hydroquinone and 2,6-dibromohydroquinone were found, indicating partly debromination and replacement of the nitrile group by hydroxyl. The major parts of bromoxynil and of the metabolites were recovered in glucosidic conjugates. In Stellaria media the same metabolites as in Hordeum vulgare were determined. Additional­ ly, metabolites of unknown structures without bromine were detected. 
  Reference    Z. Naturforsch. 47c, 126—131 (1992); received June 18/August 21 1991 
  Published    1992 
  Keywords    Herbicide, Bromoxynil, Metabolites, Structural Elucidation, Hordeum vulgare, Stellaria media 
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 TEI-XML for    default:Reihe_C/47/ZNC-1992-47c-0126.pdf 
 Identifier    ZNC-1992-47c-0126 
 Volume    47