Studies on the constituents of the annual shoots of Larix leptolepis GORDON (IV)

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Qualitative and quantitative changes of the phenolic compounds in the annual shoots and the leaves of 17-year-old Larix leptolepis GORDON were investigated by TLC and spectrophotometric methods from June 1 to November 1, 1975. In the leaves, little change of quality was observed during the stage of development, while kaempferol began to appear before the fall of leaves. In the annual shoots, kaempferol-3-O-glucoside disappeared in summer and kaempferol began to appear in autumn but other constituents were observed during all stages of development. With the quantitative change, kaempferol-3-O-glucoside in the leaves did not decrease or increase from spring to autumn but slightly increased before the fall of leaves. Catechin in the annual shoots was found to increase from spring to autumn. From these results physiological effects, translocation and metabolism of these compounds were discussed.
日本森林学会の論文