Composition of cuticular waxes coating flag leaf blades and peduncles of Triticum aestivum cv. Bethlehem
| Autor: | Shelly Hen-Avivi, Radu C. Racovita, Antonio Granell, Asaph Aharoni, Reinhard Jetter, Josefina-Patricia Fernandez-Moreno |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Wax ester metamers Peduncle (anatomy) Triticum aestivum Plant Science p-Hydroxy-phenethyl esters Horticulture Bread wheat Poaceae 01 natural sciences Biochemistry Gas Chromatography-Mass Spectrometry Plant Epidermis Epicuticular wax Primary alcohols b-Diketones 03 medical and health sciences chemistry.chemical_compound Botany Organic chemistry Molecular Biology Chemical composition Triticum Wax Terpenes Chemistry food and beverages Esters General Medicine Ketones Terpenoid Plant Leaves Wax ester Cuticular wax Benzyl esters Phenethyl esters 030104 developmental biology 2-Alkanol esters Chain length profiling Alcohols Waxes visual_art visual_art.visual_art_medium Composition (visual arts) 010606 plant biology & botany |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| ISSN: | 0031-9422 |
| DOI: | 10.1016/j.phytochem.2016.05.003 |
| Popis: | [EN] The work herein presents comprehensive analyses of the cuticular wax mixtures covering the flag leaf blade and peduncle of bread wheat (Triticum aestivum) cv. Bethlehem. Overall, Gas Chromatography Mass Spectrometry and Flame Ionization Detection revealed a wax coverage of flag leaf blades (16 mu g/cm(2)) a third that of peduncles (49 mu g/cm(2)). Flag leaf blade wax was dominated by 1-alkanols, while peduncle wax contained primarily beta-diketone and hydroxy-beta-diketones, thus suggesting differential regulation of the acyl reduction and beta-diketone biosynthetic pathways in the two analyzed organs. The characteristic chain length distributions of the various wax compound classes are discussed in light of their individual biosynthetic pathways and biosynthetic relationships between classes. Along with previously reported wheat wax compound classes (fatty acids, 1-alkanols, 1-alkanol esters, aldehydes, alkanes, beta-diketone, hydroxy-beta-diketones, alkylresorcinols and methyl alkylresorcinols), esters of 2-alkanols and three types of aromatic esters (benzyl, phenethyl and p-hydroxyphenethyl) are also reported. In particular, 2-heptanol esters were identified. Detailed analyses of the isomer distributions within 1-alkanol and 2-alkanol ester homologs revealed distinct patterns of esterified acids and alcohols, suggesting several wax ester synthases with very different substrate preferences in both wheat organs. Terpenoids, including two terpenoid esters, were present only in peduncle wax. (C) 2016 Elsevier Ltd. All rights reserved. Generous financial support from the Natural Sciences and Engineering Research Council (Canada) Discovery Grant #2208738 and the Canada Foundation for Innovation Grant #201681 is gratefully acknowledged. |
| Databáze: | OpenAIRE |
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