摘要
探讨打破牡丹种子上胚轴休眠的有效方法对于保护野生牡丹种质资源具有非常重要的理论与实践意义.在不同温度条件下,用不同处理方法对昆明西山野生黄牡丹居群种子进行生根与发芽试验.结果表明:200 mg/L GA3溶液浸泡24 h、挫伤种脐处种皮和50℃温水浸种3种处理方法对黄牡丹种子胚根的生长都有促进作用,其促根生长的效果从高到低依次为200 mg/LGA3溶液浸泡>种皮挫伤>温水浸泡;GA3溶液浸泡能打破黄牡丹种子上胚轴休眠,促进生根种子提前发芽,尤其是对根长超过3 cm的种子发芽更为有效,单纯的5℃低温条件不能打破黄牡丹种子的上胚轴休眠.15℃是野生黄牡丹种子生根和发芽都比较适合的温度条件.
It is of great theoretical and practical significance for conserving the wild tree peony germplasm resources to study the epicotyl dormancy characteristics of these species and the effective enhancement measures for the seed germination. Having been treated with different ways, the rooting and germination experiments were conducted with the seeds collected from wild population of Paeonia lutea in the West Mount of Kunming City under different temperature conditions. The following conclusions were drawn from the experiment results： Methods of soaking the seeds in solution of 200 mg/L GA3, contusing the testa around umbilicus and soaking the seeds in 50 ℃ water could all improve the radicle growth, and the effectiveness order was 200 mg/L GA3 solution soaking 〉 testa contusing 〉 50 ℃ water soaking. Soaking the seeds with 200 mg/L GA3 solution could break epicotyl dormancy of the rooted seeds and enhance the germination, and the effect was even better on seeds with radicles longer than 3 cm. 5 ℃ low temperature condition alone could not effectively break epicotyl dormancy of the rooted seeds. 15 ℃ temperature was comparatively appropriate for both radicle growth and seed germination of Paeonia lutea.
出处
《西南林学院学报》
2007年第5期34-37,共4页
Journal of Southwest Forestry College
基金
云南省教育厅基金项目资助(07Z10215)
关键词
黄牡丹
居群
种子
休眠
萌发
昆明
Paeonia lutea
population
seed
dormancy
germination
Kunming
