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'Pterocarpans' in keywords Facet   Publication Year 1981  [X]
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1Author    U. Zähringer1, E. Schaller2, H. Grisebach1Requires cookie*
 Title    Induction of Phytoalexin Synthesis in Soybean. Structure and Reactions of Naturally Occurring and Enzymatically Prepared Prenylated Pterocarpans from Elicitor-Treated Cotyledons and Cell Cultures of Soybean  
 Abstract    Using HPLC on a partisil column (5 nm) it was possible to separate two reaction products from an enzyme incubation o f dimethylallylpyrophosphate and 3,6a,9-trihydtoxypterocarpan with a particulate fraction from elicitor-treated soybean cotyledons (Harosoy 63) or soybean cell cultures. These two products were identified by MS and !H-NMR analysis as 2-and 4-dimethylallyltrihy-droxypterocarpan. Both compounds also occur as natural products in elicitor-treated soybean cotyledons and to a smaller extent in soybean cell cultures. Introduction of the dimethylallyl substituent into trihydroxypterocarpan increases the fungitoxicity against Cladosporium cucume-rinum. Upon treatment with alkali, solutions o f 3,6a,9-trihydroxypterocarpans turn to an intense red colour with Amax around 530 nm. One of the products from 2-DMA-THP could be isolated by reversed phase HPLC. According to its mass spectrum a quinoid structure is proposed for this red pigment. 
  Reference    Z. Naturforsch. 36c, 234—241 (1981); received December 81980 
  Published    1981 
  Keywords    Phytoalexins, Pterocarpans, Dimethylallyl Transferase, Soybean, Glycine max L, Red Pigment 
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 TEI-XML for    default:Reihe_C/36/ZNC-1981-36c-0234.pdf 
 Identifier    ZNC-1981-36c-0234 
 Volume    36