Waxes form a continuous lipid membrance covering the epidermal cells of all aerial plant organs . it mainly comprised of lony - chain aliphatic compounds derived from very long chain fatty acids that are enlongedsfrom c16 - or c18 - long fatty acids in er by many fatty acid elongation ( fae ) complexs 陆生植物的气生器官的表皮覆盖着一层由蜡质形成的脂膜，它主要由长链疏水物质组成的，这些物质是特长链脂肪酸的衍生物。
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