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Composition of the epicuticular and intracuticular wax layers on Kalanchoe daigremontiana (Hamet et Perr. de la Bathie) leaves

TitleComposition of the epicuticular and intracuticular wax layers on Kalanchoe daigremontiana (Hamet et Perr. de la Bathie) leaves
Publication TypeJournal Article
Year of Publication2009
Authorsvan Maarseveen, C, Jetter, R
JournalPhytochemistry
Volume70
Pagination899-906
Date PublishedMay
Type of ArticleArticle
ISBN Number0031-9422
Keywordschain length, CHEMICAL-COMPOSITION, Crassulaceae, DUDLEYA, friedelin, glutinol, Kalanchoe daigremontiana, LEAF CUTICULAR WAXES, leaf surface, PINNATA, PLANTS, STEROLS, SURFACES, SYNTHASE, triterpenoids, Very long chain fatty acids
Abstract

Epicuticular and intracuticular waxes from both adaxial and abaxial surfaces of the leaves of Kalanchoe daigremontiana were analyzed. All wax mixtures were found to contain approximately equal amounts of triterpenoids and very long chain fatty acid (VLCFA) derivatives. The triterpenoid fraction consisted of glutinol (8-19% of the total wax) and friedelin (4-9%), together with smaller amounts of glutanol, glutinol acetate, epifriedelanol, germanicol and beta-amyrin. The VLCFA derivatives comprised C-27-C-35 alkanes (19-37% of the total wax), C-32-C-34 aldehydes (3-7%), C-32 and C-34 fatty acids (0.2-3%), C-26-C-36 primary alcohols (4-8%), and C-42-C-52 alkyl esters (2-9%). The wax layers were found to differ in triterpenoid amounts, with the intracuticular wax containing higher percentages of most triterpenoids than the epicuticular wax. Friedelin, the only triterpenoid ketone present, showed the opposite distribution with higher proportions in the epicuticular wax. VLCFA derivatives also accumulated to higher percentages in the epicuticular than in the intracuticular wax layer. Epicuticular wax crystals were observed on both the adaxial and abaxial leaf surfaces. (C) 2009 Elsevier Ltd. All rights reserved.

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