ミズキの葉の展開とシュート伸長
1992 年 42 巻 2 号 p. 115-123
詳細
1992 年 42 巻 2 号 p. 115-123
Leaf expansion and shoot elongation of Cornus controversa HEMSLEY were studied in Ishikawa Prefecture in 1988. The overwintered buds burst in early April. Each of them expanded 7〜14 leaves by late May and developed to the first shoots. About 45% of the overwintered buds produced the second shoots. The earliest elongation of the second shoots was observed on May 18. The first shoots tended to have more leaves and attained great elongation, and their earliest expanding leaves were larger when they repeatedly produced new shoots. There was a significant positive corelation between the lengths of the first and the second shoots. A weak positive corelation was observed between the lengths of the first shoots of the current year and of the final shoots of the following year. These facts suggest that the elongations of the second and the higher-order shoots would greatly depend on the photosynthates of leaves of the first shoots.
