Surface and Internal Lipids of Calotropis gigantea L. Leaves

The surface and internal lipids of Calotropis gigantea L. (Ascelepiadaceae) leaves analysed. The surface lipids (0.8%, dry wt.) consisted of hydrocarbons (22.2%), ester waxes (20.7%), aldehydes (7.9%), triacylglycerols (4.6%), fatty acids (20.0%), sterols (13.2%), diacylglycerols (3.3%), monoacylglycerols (2.9%) and unidentified components (5.2%). The internal lipids (8.3%, dry wt.) contained 52.8, 21.7 and 25.5% non-polar, glyco- and phospholipids, respectively. The internal non-polar lipids were made up of pigments (13.5%), hydrocarbons (6.4%), ester waxes (6.2%), fatty acids (6.7%), sterols (5.7%), diacylglycerols (2.5%) and monoacylglycerols (2.3%). The glycolipids comprised esterified sterylglycosides (2.4%), monogalactosyldiglycerides (8.4%), sterylglycosides (1.7%), cerebrosides (2.3%). digalactosyldiglycerides (4.2%) and sulfoquinovosyldiglycerides (2.7%). The phospholipids were composed of cardiolipin (2.8%), phosphatidylglycerol (5.6%), phosphatidylethanolamine (4.0%), phosphatidylinositol (3.6%), phosphatidylcholine (8.3%) and phosphatidylserine (1.2%). All the internal lipid classes had high contents of linolenic, palmitic and linoleic acid whereas the surface lipids contained palmitic and stearic acids as major components. Die Oberflachenlipide sowie inneren Lipide der Blatter von Calotropis gigantea L. Es wurden die Oberflachenlipide und die inneren Lipide der Blatter von Calotropis gigantea L. (Ascelepiadaceae) untersucht. Die Oberflachenlipide (0.8% Trockengewicht) bestanden aus Kohlenwasserstoffen (22.2%), Esterwachsen (20.7%), Aldehyden (7.9%), Triacylglycerolen (4.6%), Fettsauren (20.0%), Sterinen (13.2%), Diacylglycerolen (3.3%), Monoacylglycerolen (2.9%) und nicht identifizierten Verbindungen (5.2%). Die inneren Lipide (8.3% Trockengewicht) enthielten jeweils 52.8, 21.7 und 25.5% unpolare, Glyco- und Phospholipide. Die inneren unpolaren Lipide bestanden aus Pigmenten (13.5%), Kohlenwasserstoffen (6.4%), Esterwachsen (6.2%), Fettsauremethylestern (3.2%), Aldehyden (3.1%), Triacylglycerolen (3.2%), Fettsauren (6.7%), Sterinen (5.7%), Diacylglycerolen (2.5%) und Monoacylglycerolen (2.3%). Die Glycolipide enthielten veresterte Steringlycoside (2.4%), Monogalaktosyldiglyceride (8.4%), Steringlycoside (1.7%), Cerebroside (2.3%), Digalaktosydiglyceride (4.2%) und Sulfoquinovosyldiglyceride (2.7%). Die Phospholipide setzen sich aus Cardiolipin (2.8%), Phosphatidylglycerol (5.6%), Phosphatidylethanolamin (4.0%), Phosphatidylinositol (3.6%), Phosphatidylcholin (8.3%) und Phosphatidylserin (1.2%) zusammen. Alle Klassen der inneren Lipide besasen hohe Gehalte an Linolen-, Palmitin- und Linolsaure, wahrend die Oberflachenlipide als Hauptbestandteile Palmitin- und Stearinsaure enthielten.