Institut für Botanik, Universität Hohenheim, Garbenstraße 30, D-7000, Stuttgart 70, Federal Republic of Germany.
Planta. 1979 Sep;146(4):399-403. doi: 10.1007/BF00380851.
Water permeability and composition of soluble cuticular lipids of isolated cuticular membranes from leaves of Citrus aurantium L. were investigated for 3 successive years. The average water permeability coefficient determined using 169 cuticular membranes was 1.09·10(-7) cm s(-1) with a standard deviation of 0.78·10(-7) cm s(-1). There were no significant differences in water permeability between years. Cuticular membranes are characterized by a great variability in water permeability both within and between years. Both water permeability of individual membranes and variability between membranes are shown to be determined by soluble cuticular lipids contained within the cuticular membranes. The soluble cuticular lipids of Citrus leaves are composed of fatty acids, primary alcohols, esters, and hydrocarbons. They occur in amounts of 9.84 μg cm(-2), which represents approx. 3% of the total mass of isolated cuticular membranes. The specific weight of cuticular membranes (365.4 μg cm(-1)) and total amount of soluble cuticular lipids did not vary significantly between years. Significant differences were observed for the amounts and composition of the constituent classes of lipids. Six homologues comprise 86% of the fatty acids (C16; C18; C19; C21; C24; C26), 83% of the primary alcohols (C24; C26; C28; C30; C32; C34) and 88% of the esters (C36; C38; C40; C41; C42; C44). Eleven major homologues amount only to 62% of the total hydrocarbons (C16; C17; C18; C20; C26; C27; C29; C30; C31; C32; C33). Variability in the composition of soluble cuticular lipids between years was much smaller than variability of water permeability and, therefore, no relation between composition of soluble cuticular lipids and water permeability could be found. It is suggested that this may be due to the fact that the lipid composition observed represents the averages of 20 to 30 membranes analyzed so that differences between individual membranes may have been leveled out.
连续 3 年研究了来自甜橙（Citrus aurantium L.）叶片的分离表皮膜的水渗透性和可溶性角质层脂质的组成。使用 169 个表皮膜测定的平均水渗透系数为 1.09·10(-7)cm s(-1)，标准偏差为 0.78·10(-7)cm s(-1)。水渗透性在不同年份之间没有显著差异。角质层膜在水渗透性方面表现出很大的变异性，无论是在不同年份之间还是在同一年内。个体膜的水渗透性和膜之间的变异性都被证明是由包含在角质层膜内的可溶性角质层脂质决定的。柑橘叶片的可溶性角质层脂质由脂肪酸、伯醇、酯和烃组成。它们的含量为 9.84μg cm(-2)，约占分离角质层膜总质量的 3%。角质层膜的比重量（365.4μg cm(-1)）和可溶性角质层脂质的总量在不同年份之间没有显著差异。脂质组成类别的含量和组成存在显著差异。六种同系物构成了 86%的脂肪酸（C16；C18；C19；C21；C24；C26）、83%的伯醇（C24；C26；C28；C30；C32；C34）和 88%的酯（C36；C38；C40；C41；C42；C44）。11 种主要同系物仅占总烃类（C16；C17；C18；C20；C26；C27；C29；C30；C31；C32；C33）的 62%。可溶性角质层脂质组成在不同年份之间的变化比水渗透性的变化小得多，因此，无法找到可溶性角质层脂质组成与水渗透性之间的关系。这可能是因为所观察到的脂质组成代表了 20 到 30 个被分析的膜的平均值，因此个体膜之间的差异可能已经被平均化了。
