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Biosynthesis of pentacyclic triterpenoids in leaves of Ilex aquifolium L.
Authors:G. J. Niemann
Affiliation:(1) Botanisch Laboratorium, Rijksuniversiteit Utrecht, Lange Nieuwstraat 106, NL-3512 PN Utrecht, The Netherlands
Abstract:Ilex leaves can utilize sucrose and mevalonate for the synthesis of triterpene esters. Mevalonate is also used for the synthesis of free triterpenoid alcohols, but sucrose is not. The selectivity of precursor utilization indicates separate sites for triterpenol and triterpenol-ester synthesis. The sites of synthesis are not found at the main locations of accumulation of triterpenols (the epicuticular wax) or triterpene esters (the cytoplasmatic lipid globules). Transport from the site of synthesis to the lipid globules, and especially towards the epicuticular wax, is slow.Abbreviations MVA mevalonic acid lactone - TLC thin layer chromatography
Keywords:Ilex  Leaf wax  Lipid globule  Mevalonate  Palmitate  Triterpene synthesis  Wax
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