欢迎访问林业科学,今天是

林业科学 ›› 2004, Vol. 40 ›› Issue (3): 46-50.doi: 10.11707/j.1001-7488.20040307

• 论文及研究报告 • 上一篇    下一篇

泡桐顶侧芽休眠发育的温度特性研究

刘震 何松林 王艳梅 李广涛 蒋建平   

  1. 河南农业大学林学园艺学院,郑州450002
  • 收稿日期:2003-05-23 修回日期:1900-01-01 出版日期:2004-05-25 发布日期:2004-05-25

Study on the Temperature Characteristics of Dormancy Development of Terminal and Lateral Buds in Paulownia

Liu Zhen,He Songlin,Wang Yanmei,Li Guangtao,Jiang Jianping   

  1. College of Forestry and Horticulture, Henan Agricultural University Zhengzhou450002
  • Received:2003-05-23 Revised:1900-01-01 Online:2004-05-25 Published:2004-05-25

摘要:

为探明泡桐顶芽枯死原因以及利用侧芽进行人工接干的理论基础,采用切枝水培法研究了毛白33泡桐顶侧芽休眠发育的温度特性。结果表明:①毛白33泡桐的顶芽和侧芽1不是因为早霜或寒冷冻害而死,可能是进化过程中采取的一种适应策略;②毛白33泡桐侧芽2、3、4发育成了冬休眠芽,能够抵御冬季寒冷而越冬,并利用冬季低温信号解除其休眠,使冬芽萌发可能温度范围向低温方向扩大;③毛白33泡桐侧芽2、3、4在春季可以同时萌发,但侧芽3萌发率稍高些,而侧芽5难于萌发;④在25℃下上部侧芽的萌发一定程度上抑制了下部侧芽的萌发,但15℃下不存在上部侧芽萌发抑制下部侧芽萌发的现象。

关键词: 毛白33泡桐, 顶侧芽, 冬休眠, 温度

Abstract:

In order to probe the death reason of terminal buds and carry out trunk extension by using lateral buds, the temperature characteristics of dormancy development of terminal and lateral buds in Paulownia tomentosa×P.fortunei 33 were investigated by raising cutting branches on different date at 25℃ and 15℃. The results were as follows: ①The death reason of terminal buds and the first pair of lateral buds was possibly itself ecological adapting strategy, not the injury of early frost and freezing; ②The lateral buds 2,3 and 4 had obtained the feature of winter dormancy, and could survive from cold winter, and widen its possible temperature range of sprouting to lower temperature by experiencing winter chilling; ③The lateral buds 2,3 and 4 could sprout at the same time in spring, but it was difficult to sprout for other lateral buds; ④The sprouting of upper lateral buds could restrict the sprouting of lower lateral buds at 25℃, but not at 15℃.

Key words: Paulownia tomentosa×, P. fortunei 33, Terminal and lateral buds, Winter dormancy, Temperature