首页> 中文期刊> 《林业科学》 >大花黄牡丹种子休眠的解除

大花黄牡丹种子休眠的解除

         

摘要

We studied the effect of temperature, GA3 and ethephon treatment on seed dormancy release of Paeonia ludlowii whose seeds were collected from Linzhi and Milin County, Tibet on semptember. The seeds were naturally dried up for 3 months indoor. The result showed that: (1) The seeds were soaked in water at ordinary temperature for 7 d before they were sowed in outdoor seedbed in Kunming, Yunnan province. They began to root 140 d later; started sprouting after 288 d and the course was terminated on the 490th day with seed germination rate 35%. (2) Temperature affected seed germination significantly. The seeds could not root when it was lower than 10℃ or higher than 25℃. 15℃ was the best temperature for hypocotyl dormancy release; 15 ℃ and 20℃ were the appropriate temperature for epicotyl dormancy release. ( 3 ) There was no significant difference of seed rooting rate between the treatments and control, which was both more than 96%. (4) GA3 could break the epicotyl dormancy obviously, of which 300 mg·L-1 was most effective. (5) In conclusion, the optimum procedure for seed germination was as followed: first, the seeds should be soaked in Water at ordinary temperature for 7 d, after that sowed in outdoor seedbed; the seeds were put in 300 mg·L GA3 solution for 2 h when their roots grew up to 3 cm in length. According to the procedure, the seed germination duration was about 120 d and germination rate could be more than 95% , accelerated 370 d and increased 171. 4% respectively compared with conventional seeding.%以9月采收于西藏林芝县、米林县并经自然晾干、室内储存3个月的大花黄牡丹种子为材料,研究温度、GAs、乙烯利等处理对种子休眠的解除效应.结果表明:1)经7天常温清水浸泡后直接播种于露地苗床,种子于第140天发根,第288天发芽,至发芽结束共490天,发芽率35%左右.2)温度对大花黄牡丹种子萌发具显著影响,低于10℃及高于25℃培养的种子均不能发根,15℃对下胚轴休眠解除效果最佳;15 ℃及20℃对上胚轴休眠解除效果最理想.3)各处理与对照的发根率均可达96%以上.4)GA3处理大花黄牡丹生根种子可起到显著的上胚轴休眠解除效果,其中以300 mg·L -1处理效果最佳.5)综合考虑上胚轴及下胚轴休眠解除,理想的种子萌发条件为:播种前常温清水浸泡7天,于15℃恒温培养;待根生长至3 cm以上时,以300 mg·L-1GA3浸泡2h,置于15℃恒温培养.按此处理,发芽历期约120天,发芽率达95%以上,分别较常规播种缩短370天和提高171.4%以上.

著录项

相似文献

  • 中文文献
  • 外文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号