芳樟葉の精油含有組織と収油率について

抄録

(1) The oil of Cinnamomum sp. leaves is accumulated within oil sacs distributed in both palisade and spongy tissues. (2) The oil sacs of young leaves are more or less of small type and the accumulation of oil drop therein is also a small amount. Along with the growth of the leaves in a stem, however, the size of the oil sacs as well as the oil drops therein increases. (3) Generally, the density of the oil sacs is high in the upper leaves (young leaves), and the diameters of the oil sacs and oil drops are large in the intermediate and lower leaves (matured older leaves). (4) In the high oil yield strains the density of the oil sacs and also the degree of fulfillment of oil drops within the oil sacs is high, and the number of oil drops contained in protoplasm is greater. (5) It is considered that the rise in temperature raises the yield of oil.