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Publication Type J
Authors Grossi, V. and D. Raphel
Title Long-chain (C-19-C-29) 1-chloro-n-alkanes in leaf waxes of halophytes of the Chenopodiaceae
Source Phytochemistry
Author Keywords Suaeda vera; Sarcocornia fruticosa; Halimione portulacoides; Chenopodiaceae; halophytes; leaf waxes; chloro-alkanes; hydrocarbon fractions diversity
Abstract The hydrocarbon fraction of leaf waxes of three halophytes of the Chenopodiaceae common to Mediterranean salt marshes (Suaeda vera. Sarcocornia fruticosa and Halimione portulacoides) revealed the presence of a minor series of odd and even chains 1-chloro-n-alkanes ranging from C-19 to C-29. The identification of these new chlorinated plant constituents was based on a combination of mass spectrometry data with selective chlorine detection (CPG-AED) and was confirmed by comparison with authentic standards. The qualitative and quantitative distributions of these 1-chloro-n-alkanes varied inter- specifically. Homologues with an odd carbon-chain were predominant in all species but maximised at C-25 and C-27 in S. vera and S. fruticosa, and at C-27 and C-29 in H. portulacoides. Remarkably, 1-chloro-nonacosane was an abundant homologue only in this latter species. Leaves of S. vera contained 4 to 7 times more of total chloroalkanes than leaves of the other two species. These compounds accounted for 10, 4 and 1% of the hydrocarbon fraction of leaf waxes of S. vera, S. fruticosa and H. portulacoides, respectively. Attempts to link the occurrence of these chloroalkanes with other classes of leaf waxes (n-alkenes, n-aldehydes and n-alcohols) did not allowed a clear precursor-product relationship to be established. The biological functions as well as the mode of synthesis of alkylchlorides in (halophyte) plants remain unknown but undoubtedly deserve further attention. (C) 2003 Elsevier Ltd. All rights reserved.
Author Address Ctr Oceanol Marseille, CNRS, UMR 6535, Lab Oceanog & Biogeochim, Campus Luminy,Case 901, F-13288 Marseille, France Ctr Oceanol Marseille, CNRS, UMR 6535, Lab Oceanog & Biogeochim, F-13288 Marseille, France Grossi V Ctr Oceanol Marseille, CNRS, UMR 6535, Lab Oceanog & Biogeochim, Campus Luminy,Case 901, F-13288 Marseille, France
29-Character Source Abbreviation Phytochemistry
Publication Date Jul
Year Published 2003
Volume 63
Issue 6
Beginning Page 693-698
Unique Article Identifier ISI:000184064900008
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