Homologous very-long-chain 1,3-alkanediols and 3-hydroxyaldehydes in leaf cuticular waxes of Ricinus communis L |
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Authors: | Vermeer Cornelia P Nastold Peter Jetter Reinhard |
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Affiliation: | Julius-von-Sachs-Institut, Universit?t Würzburg, Julius-von-Sachs-Platz 3, D-97082 Würzburg, Germany. |
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Abstract: | Surface extracts from primary leaves of Castor bean were found to contain 1.8 microg cm(-2) of cuticular waxes. The mixture comprised alkanes (C(26)-C(29)), primary alcohols (C(22)-C(38)), aldehydes (C(26) and C(28)), fatty acids (C(20)-C(34)) and triterpenoids (lupeol, beta- and alpha-amyrin). Besides, a series of n-alkane-1,3-diols was detected, with chain lengths ranging from C(22) to C(28), a strong predominance of even-numbered homologs, and a maximum for hexacosane-1,3-diol. Seven other compounds were assigned to a novel class of wax constituents and identified as homologous unbranched 3-hydroxyaldehydes ranging from C(22) to C(28). As the chain length distribution of this series closely paralleled the homolog pattern of 1,3-diols, it seems likely that both compound classes are biosynthetically related. |
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Keywords: | Cuticular waxes Castor bean Ricinus communis Euphorbiaceae Diols Hydroxyaldehydes |
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