外源激素与温度对花楸树种子萌发的影响  

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

作　　者：杨玲[1] 崔晓涛[1] 沈海龙[1] 

机构地区：[1]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

出　　处：《植物生理学通讯》2009年第6期555-560,共6页Plant Physiology Communications

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

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℃(16h光/8h暗,10d)-5℃(暗110d)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。200mg·L-16-BA溶液中吸胀2d后经历25℃-5℃变温可使种子发芽初始时间最短(33d),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。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-16-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.

关 键 词：花楸树 种子萌发 外源激素 温度 

分 类 号：S792.25[农业科学—林木遗传育种]