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'a Amylase' in keywords Facet   Publication Year 1990  [X]
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1Author    Ralf Hautzel, Heidrun AnkeRequires cookie*
 Title    Screening of Basidiomycetes and Ascomycetes for Plant Growth Regulating Substances. Introduction of the Gibberellic Acid Induced de-novo Synthesis of Hydrolytic Enzymes in Embryoless Seeds of Triticum aestivum as Test System  
 Abstract    A new test system for the detection of plant growth regulating activities was successfully employed. In a screening for inhibitors of the gibberellic acid controlled synthesis of hydrolytic enzymes in embryoless wheat seeds (T riticum aestivum) 160 cultures of ascomycetes and basi­ diomycetes were tested. In the extracts of two cultures inhibitory activities were detected. From fermentations of a Hypholoma-species (basidiomycetes) 3,5-dichloro-4-methoxybenzyl alcohol \ yas isolated as the active principle. Galiellalactone and two other new phytotoxins were isolated from cultures of the ascomy-cete G aliella rufa. At concentrations of 50 |ig/ml all four compounds inhibited the de-novo synthesis of a-amylases, proteases, and phosphatases. Further investigations on the mode of action revealed, that all four metabolites interfere with early steps of the biosynthetic path­ ways induced by gibberellic acids. In vivo, the germination of the seeds of several plants was inhibited by these compounds. 
  Reference    Z. Naturforsch. 45c, 1093—1098 (1990); received July 19 1990 
  Published    1990 
  Keywords    Galiella rufa, Hypholoma species, a-Amylase, Plant Growth Regulator, Galiellalactone, 3, 5-Dichloro-4-methoxybenzyl Alcohol 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-1093.pdf 
 Identifier    ZNC-1990-45c-1093 
 Volume    45