몇 소나무類의 葉綠素 含量의 月別 變化

Abstract

To obtain the fundamental data about the chlorophyll contents of some conifers, monthly measurements of them per unit fresh weight(g) of needles were performed. The results were summarized as follows. 1. Difference of total chlbrophyll contents between measuring timks in a species was clear but not between species. Total chlorophyll content in summer showed high value and that in winter did low value. 2. In general, the'total chlorophyll contents of the conifers showed the highest values in twoyear- old needles, measured in July or August. 3. Monthly change of total chlorophyll contents was mainly due to that of the contents of chlorophyll a, and the contents of chlorophyll b was not varied greatly with measuring times. 4. It seems that the physiological activity of needles was closely related with the contents of chlorophyll a.