Abstract
The purpose of this study was to obersve experimentally the relation between the seasonal variation of the quantities of chlorophyll and carotinoid contained in the leaves of Quinara tricuspidata, Koehne and several meteorological factors during the period from autumnal tints to defoliation. Observations were made in sunny (S) and shady (D) places at the Central Meteorological Observatory in Tokyo.
The method of extraction of pigments was the same as that of Willstätter-Stoll modified by Schertz, and a calorimetric method was employed.
The results are as follows:- The quantity (S-D) of chlorophyll pigment is influenced by the rise and fall of temperature, amount of rainfall and the duration of sunshine, while that of carotinoid only by the temperature decrements.
