天然油菜素内酯对油松和刺槐种子发芽的影响  

EFFECT OF NATRUAL BRASSINOLIDE ON GERMINATION OF PINUS TABULAEFORMIS AND ROBINIA PSEUDOACACIA SEEDS

作　　者：李凯荣[1] 张胜利[1] 贺秀贤[1] 

机构地区：[1]西北农林科技大学,杨凌712100

出　　处：《林业科学》2002年第6期150-153,共4页Scientia Silvae Sinicae

摘　　要：The germination capacity of Pinus tabulaeformis seeds was obviously improved after the seeds were soaked with the different concentrations of natural brassinolide. The germination rate and germination energy of the seeds were increased by 23 1% and 14 94% respectively, and the mean germination speed ( i.e. germination time) of the seeds was cut down by 1 day under the best concentration (0 05?mg·L -1 ) treatment, compared with the control. After Robinia pseudoacacia seeds were treated with the best concentration(0 1?mg·L -1 ) of natural brassinolide, the germination rate and germination energy of the seeds were increased by 10 9% and 15 9% respectively, and the mean germination speed of the seeds was cut down by 1 26 day, compared with the control. After hypocotyls of Pinus tabulaeformis and Robinia pseudoacacia were treated with the natural brassinolide, the elongation of their hypocotyls was obviously increased. 0 01?mg·L -1 concentration of the natural brassinolide was the most suitable for the elongation of Pinus tabulaeformis hypocotyls,and 0 005?mg·L -1 concentration was the best for the elongation of Robinia pseudoacacia hypocotyls.The germination capacity of Pinus tabulaeformis seeds was obviously improved after the seeds were soaked with the different concentrations of natural brassinolide. The germination rate and germination energy of the seeds were increased by 23 1% and 14 94% respectively, and the mean germination speed ( i.e. germination time) of the seeds was cut down by 1 day under the best concentration (0 05?mg·L -1 ) treatment, compared with the control. After Robinia pseudoacacia seeds were treated with the best concentration(0 1?mg·L -1 ) of natural brassinolide, the germination rate and germination energy of the seeds were increased by 10 9% and 15 9% respectively, and the mean germination speed of the seeds was cut down by 1 26 day, compared with the control. After hypocotyls of Pinus tabulaeformis and Robinia pseudoacacia were treated with the natural brassinolide, the elongation of their hypocotyls was obviously increased. 0 01?mg·L -1 concentration of the natural brassinolide was the most suitable for the elongation of Pinus tabulaeformis hypocotyls,and 0 005?mg·L -1 concentration was the best for the elongation of Robinia pseudoacacia hypocotyls.

关 键 词：天然油菜素内酯 油松 刺槐 种子发芽 下胚轴伸长 水地保持林 种子处理 

分 类 号：S727.22[农业科学—林木遗传育种] S723[农业科学—林学]