Potato tubers exhibit both homolytic and heterolytic hydroperoxide fatty acid-cleaving activities.
The action of a crude potato-tuber extract on 9- and 13-hydroperoxides of linoleic and linolenic acids was investigated. HPLC analysis revealed that 50% of the 9-hydroperoxide isomers and almost all the 13-hydroperoxide isomers were rapidly enzymically metabolized. No degradation of fatty acid hydroperoxides was observed with a thermally denatured enzymic extract. GC-MS identification of the volatiles formed by the reaction revealed that no volatiles were detected from the 9-hydroperoxide isomers, whereas 13-hydroperoxide of linolenic acid was cleaved into (Z)-3-hexenal, pentenols or dimers of pentene.
Fauconnier
M L
ML
Unité de Chimie Générale et Organique, Faculté Universitaire des Sciences Agronomiques de Gembloux, Passage des Déportés, 2-B-5030 Gembloux, Belgium. fauconnier.mi@fsagx.ac.be
Delcarte
J
J
Hoyaux
P
P
du Jardin
P
P
Marlier
M
M
D000475:Alkenes / Q000378:metabolism; D019281:Dimerization; D008401:Gas Chromatography-Mass Spectrometry; D006591:Hexobarbital / Q000378:metabolism; D007536:Isomerism; D008041:Linoleic Acids / Q000378:metabolism*; D044243:Linoleic Acids, Conjugated; D008042:Linolenic Acids / Q000378:metabolism; D008054:Lipid Peroxides / Q000378:metabolism*; D018517:Plant Roots / Q000378:metabolism; D011198:Solanum tuberosum / Q000378:metabolism*
D000475:Alkenes; D008041:Linoleic Acids; D044243:Linoleic Acids, Conjugated; D008042:Linolenic Acids; D008054:Lipid Peroxides; C024347:9-hydroxy-10,12-octadecadienoic acid; C042835:13-hydroxylinoleic acid; D006591:Hexobarbital