天然油菜素内酯促进柠条和紫穗槐种子发芽及下胚轴伸长效应  

Effects of Natural Brassinolide on Germination and Hypocotyl Elongation of Caragana Microphylla and Amopha Fruticosa Seeds

作　　者：李凯荣[1] 韩刚[2] 

机构地区：[1]西北农林科技大学资源环境学院 [2]西北农林科技大学林学院,陕西杨陵712100

出　　处：《西北林学院学报》2003年第4期17-20,共4页Journal of Northwest Forestry University

基　　金：西北农林科技大学重点专项

摘　　要：用天然油菜素内酯处理后发现,与对照相比,0.05 mg/L浓度的处理使柠条种子发芽率和发芽势分别提高了23.2％和20.7％,0.1mg/L浓度使其平均发芽时间缩短了0.8 d;0.2mg/L浓度使紫穗槐种子发芽率和发芽势提高了11.4％和22.7％,平均发芽时间缩短了0.8d。天然油菜素内酯对柠条和紫穗槐下胚轴切段伸长也有明显促进作用,其中0.1mg/L浓度对柠条下胚轴伸长效应最佳,0.2 mg/L浓度促进紫穗槐下胚轴伸长效果最好。The germination capacity of the seeds were obviously promoted after Caragana microphylla seeds were soaked with different concentrations of natural brassinolide. The germination rate and capacity of the seeds was increased by 23.2% and 20.7% after using 0.05mg/L natural brassinolide treatment, and mean germination days of the seeds was cut down by 0. 8 day after seeds were treated with 0. Img/L natural brassinolide, compared with the control. After Amopha fruticosa seeds were treated with 0. 2mg/L natural brassinolide, the germination rate and capacity of the seeds were increased by 11.4% and 22. 7% respectively, and the mean germination day of the seeds was cut down by 0. 8 day, compared with the control. After hypocotyls of Caragana microphylla and Amopha.fruticosa were treated by using the natural brassinolide, the elongation of their hypocotyls were obviously increased. Treatment with 0.1mg/L natural brassinolide was the most suitable for the elongation of Caragana microphylla hypocotyls and 0. 2mg/L was the best for the elongation of Amopha fruticosa hypocotyls.

关 键 词：天然油菜素内酯 柠条 紫稳槐 种子发芽 下胚轴伸长 

分 类 号：S722.14[农业科学—林木遗传育种]