栗樹の耐寒性に関する研究 I : 冬期に於ける含水量, 呼吸量及び滲透圧の変化

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Moisture and respiration of the stems of chestnut trees and osmotic pressure of their living bark cells were investigated at various times during the period from Oct. 1956 to Mar. 1957. The stems of on-year-old chestnut trees and their stocks (Gin-yose seedlings) were chiefly used as the materials. During the investigation the water content of a sweet chestnut variety (less hardy) was a little higher than that of Japanese chestnut varieties (semi-hardy). In December, the amount of CO_2 output from the stems in Japanese chestnut varieties was less han sweet chestnut variety. In January, however, the difference among them was hardly observed. In all varieties, the respiration of the stems decreased and the osmotic pressure (with incipient plasmolysis) of the living bark cells increased rapidly from the late fall, and attained respectively to certain levels, particularly the harder varieties reached earlier. The osmotic pressure of the living bark cells of the trunk of two or three years' old, decreased gradually from the top to base.
神戸大学の論文