トリテルペノイドの研究 (第6報)

植物クチクラの成分に就いて その2

抄録

The fact that triterpenoid was the common constituent of plant cuticles was confirmed with several hundred plants. Thin pieces of pure cuticle was obtained by boiling the leaf of Ilex latifolia, which possesses the thickest cuticle, with hydrochloric acid solution of zinc chloride, with subsequent washing with water. As triterpenoids, 0.68% of ursolic acid was contained in this pure cuticle, together with 0.32% of melissyl alcohol, 38.0% of lignin, 10.2% of cellulose, 12.0% of fatty acids, 10.2% of resin, 2.0% of uronide, 6.0% of ash, and a trace of glycerol. Paper chromatography was used in determining the presence of glucose in cellulose using as a developing agent a mixture of collidine, phenol, acetic acid, and water in 4:2:3:1 ratio. It was also confirmed that the component of cuticle was very similar to the component of the cork of Quercus suber reported by Fierz-David.