赤霉素浸种与层积时间对距瓣尾囊草种子萌发的影响  

Effects of GA3 and Stratification Time on the Germination of Urophysa rochkii Seeds

作　　者：胡进耀[1] 杨敬天 贺静[1] 孙承东[1] 

机构地区：[1]绵阳师范学院,四川绵阳621000

出　　处：《四川林业科技》2015年第3期88-90,共3页Journal of Sichuan Forestry Science and Technology

基　　金：绵阳师范学院启动基金项目(MQD2011A01)

摘　　要：以距瓣尾囊草种子为实验材料,采用培养皿发芽法,研究不同浓度赤霉素浸种与层积时间对种子萌发的影响。结果表明:种子具有休眠特性,层积能够促进种子的萌发,时间越长效果越好。层积前用赤霉素浸种处理可显著提高种子发芽率和发芽势。用浓度400 mg·L-1的赤霉素对种子浸泡24 h后层积60 d的萌发效果最好,可使种子的发芽率和发芽势达到83.91%和51.60%。In the accelerating germination experiment, the seeds of Urophysa rochkii were soaked with dif- ferent concentrations（50 mg· L^-1,100 mg· L^-1 ,200 mg·L^-1,400 mg· L^-1 and 800 mg· L^-l） of GA3 ,which were treated by the cold stratification in the refrigerator, and then their germination rate was measured in the Petri dish. The results showed that the seeds of Urophysa rochkii had dormancy character- istics,the cold stratification could promote the germination of Urophysa rochkii seeds and the germination rate would increase with the increase of the time. Soaking with gibberellins before stratification had obvi- ous effects on the germination of Urophysa rochkii seeds. The seeds stratified for 60 days after soaked with gibberellins at the concentration of 400 mg·L^-1 for 24 hours had better effects, their germination rate and germination performance reached 83.91% and 51.60% , respectively.

关 键 词：距瓣尾囊草 种子 赤霉素 萌发 

分 类 号：Q945.34[生物学—植物学]