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1Author    Werner Meyer, G.Erhard SpitellerRequires cookie*
 Title    Increase of Caryophyllene Oxide in Ageing Lemon Balm Leaves (Melissa officinalis L.) -A Consequence of Lipid Peroxidation?  
 Abstract    Oxidative processes, especially lipid peroxidation (LPO), are assumed to increase during ageing. In an attempt to provide experimental evidence for this assumption lemon balm plants (Melissa officinalis L.) of different age and location were analyzed for oxidatively caused changes in the etheric oil composition. The investigation revealed that the caryophyl­ lene oxide (CarO) content of lemon balm plants -a main constituent -depends on two factors: age and habitat. The content of CarO increased with age continuously up to a factor of 3. Poor nutritive conditions, as growth on unfertilized soil, also caused an increase in CarO content. Addition of Fe2+/ascorbate -enhancing oxidative processes -promoted the formation of CarO. Hydroperoxides of unsaturated fatty acids (L O O H s) in the lipid extract of lemon balm leaves were converted to corresponding hydroxy acids (LO H s) by sodium borohydride re­ duction. These were hydrogenated and subjected to GC/MS analysis after derivatisation. A surplus of 9-hydroxy-octadecanoic acid over the 13 isomer indicated at least in part enzymatic lipid peroxidation. Polarographie determination o f the oxygen consumption revealed a gen­ erally low but in ageing plants increased lipoxygenase activity. This indicates a contribution of lipid peroxidation in the epoxidation process of caryophyllene. 
  Reference    Z. Naturforsch. 51c, 651 (1996); received May 17/June 12 1996 
  Published    1996 
  Keywords    Melissa officinalis, Lemon Balm, Caryophyllene Oxide, Lipid Peroxidation, Lipoxygenase Activity, Ageing 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0651.pdf 
 Identifier    ZNC-1996-51c-0651 
 Volume    51