@article{oai:mie-u.repo.nii.ac.jp:00010244,
 author = {櫛田, 達矢 and Kushida, T and 中島, 敦司 and Nakashima, A and 永田, 洋 and Nagata, H},
 issue = {1},
 journal = {日本林學會誌},
 month = {Feb},
 note = {application/pdf, アカマツの冬芽内の葉原基の形成経過と日長反応性の関連から, 土用芽の発生要因を検討した。1年生苗を2月20日, 3月7,22日の各日からガラス室で加温処理した後, 5月22日に野外に搬出し, 主軸の先端に形成された冬芽の土用芽の発生状況を調査した。その結果, 早い時期から加温した個体ほど, より早い時期に冬芽内の節間が伸長し始め, 土用芽の発生率も高く, 二次伸長量も大きくなった。また, 3月6日から6月4日まで加温した処理区(加温区)と無加温区の冬芽を定期的に採取し, 冬芽内に形成された葉原基の数を解剖学的な方法で調べたところ, 加温区では冬芽内の節間で急激な伸長の認められた8月中に, 90以上の葉原基の形成が確認された。一方, 無加温区で90以上の葉原基が確認されたのは9月上旬の短日条件になってからであり, 節間の急激な伸長はみられなかった。以上の結果, アカマツの土用芽とは, 90～100程度まで葉原基を形成した冬芽において, その内部の節間が野外の14時間以上の長日条件で伸長成長したものと考えられた。, The potted, two-year-old seedlings of Pinus densiflora were transferred into a greenhouse from the outdoors on February 20,March 7,and 22,1990,before the initiation of spring flush. On May 22,1990,the plants were returned to the outdoors. The earlier the seedlings were transferred into the greenhouse, the earlier the second flush started, the greater the percentages of Lammas shoot elongation were, and the larger the amounts of the secondary flush were. In the second experiments, potted seedlings were divided into two groups : 1) 139 plants grown in the greenhouse from March 6 to June 4,1990 (heated), and 2) 237 plants grown under outdoor conditions (non-heated). The terminal buds of the seedlings in both treatments were periodically sampled and the number of leaf primordia formed on the buds was counted with a microscope. In the heated seedlings, more than 90 leaf primordia were observed in August when rapid internodal elongation in the buds occurred. While more than 90 leaf primordia were observed in the non-heated seedlings in September under short-day conditions, the internodal elongation did not occur. It can be concluded that Lammas shoots in Pinus densiflora are the elongated buds, which have formed 90 through 100 leaf primordia under 14 h day length or more.},
 pages = {57--64},
 title = {春季の加温処理によるアカマツの土用芽の誘導},
 volume = {81},
 year = {1999}
}