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2 phyto alexin glycosides from potato solanum tuberosum cultivar bintje tubers infected with phoma exigua var foveata



2 phyto alexin glycosides from potato solanum tuberosum cultivar bintje tubers infected with phoma exigua var foveata



Phytochemistry 19(8): 1739-1742



Four coumarins and 7 isoprenoid compounds were identified in potato tubers infected with P. exigua var. foveata. Among these were the 7-O-.beta.-D-glucopyranoside of 7-hydroxy-6,8-dimethoxycoumarin (isofraxidin) and the sesquiterpene 2-(11,12-dihydroxy-11-methylethyl)-6,10-dimethyl-spiro[4,5]dec-6-en-8-one and its 12-O-.beta.-D-glucopyranoside, which apparently have not been previously identified in potato tubers. At least 2 diastereoisomers of the latter glucoside were present. Analysis of 8 fluorescent compounds in different parts of infected potatoes was performed by an improved HPLC [high pressure liquid chromatography] technique.

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Accession: 004538134

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