Comparative study of the composition of waxes extracted from isolated leaf cuticles and from whole leaves of Citrus: Evidence for selective extraction

Markus Riederer, Gerhard Schneider

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Abstract

The effect of different extraction methods on the composition of samples of soluble cuticular lipids (SCL) of Citrus aurantium L. was investigated. The variation of extraction yields, when whole leaves were immersed in solvent, was studied as a function of solvent type and duration of immersion. Cuticular waxes were also quantitatively extracted from isolated cuticular membranes of C. aurantium and their composition was compared to that of samples obtained by the immersion method. Significant differences were observed. Higher carbon number homologues of the aliphatic constituent classes were discriminated against when whole C. aurantium leaves were extracted by immersion. The alkyl ester fraction was almost entirely lacking in extracts from whole leaves. The dependence on carbon chain length of the saturation concentrations in chloroform of major aliphatic SCL constituents was determined. The results are discussed in terms of the major physico‐chemical processes involved in the extraction of SCL.

Original languageEnglish
Pages (from-to)373-384
Number of pages12
JournalPhysiologia Plantarum
Volume77
Issue number3
DOIs
StatePublished - Nov 1989

Keywords

  • Citrus aurantium
  • gas chromatography
  • plant cuticles
  • Pyrus communis
  • thin‐layer (planar) chromatography
  • waxes

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