《植物生理学报》 2009, 45(6): 555-560

外源激素与温度对花楸树种子萌发的影响

杨玲, 崔晓涛, 沈海龙*

东北林业大学林学院, 林木遗传育种与生物技术教育部重点实验室, 哈尔滨150040

通信作者：沈海龙；E-mail: shenhl-cf@nefu.edu.cn；Tel: 0451-82191044

摘　要：

三种外源激素和萌发温度对花楸树种子萌发影响的研究结果表明, 25 ℃ (16 h光/8 h暗, 10 d)-5 ℃ (暗110 d)变温可极 显著提高种子发芽率和种子发芽势, 但极显著延迟发芽初始时间。200 mg•L-1 6-BA溶液中吸胀2 d后经历25 ℃-5 ℃变温可 使种子发芽初始时间最短(33 d), 发芽率(62.25%)和发芽势(57.88%)最高。GA3 或 ABA 与温度的结合处理对种子萌发的促 进作用小于 6-BA 与温度的综合处理。

关键词：花楸树; 种子萌发; 外源激素; 温度

收稿：2009-02-04   修定：2009-04-27

资助：国家“ 十一五” 科技支撑项目子课题(2006BAD03-A0405)

Effects of Exogenous Plant Growth Substances and Temperature on Seed Germination of Sorbus pohuashanensis (Hance) Hedl

YANG Ling, CUI Xiao-Tao, SHEN Hai-Long*

Key Laboratory of Forest Tree Genetic Improvement and Biotechnology of Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China

Corresponding author: SHEN Hai-Long; E-mail: shenhl-cf@nefu.edu.cn; Tel: 0451-82191044

Abstract:

Effects of three exogenous plant growth substances and temperatures on the germination of mature Sorbus pohuashanensis seeds were investigated. When seeds were treated first with 25 ℃ (16 hours light/8 hours dark) for 10 days and then with 5 ℃ (24 hours dark) for 110 days (25 ℃-5 ℃ temperature change), their germination percentage and germination energy increased significantly, but the initial time of seed germination was delayed significantly. When seeds were treated with 200 mg·L^-1 6-BA for 2 d and then treated with the 25℃-5 ℃ temperature change, the initial time of seed germination could be shortened to 33 days, and the highest germination percentage (62.25%) and germination energy (57.88%) were obtained. The effects of combined treatments of GA₃ or ABA with temperature on seed germination were less than that of combined treatment of 6-BA with temperature.

Key words: Sorbus pohuashanensis; seed germination; exogenous plant growth substances; temperature