不同处理对银沙槐种子休眠破除和幼苗生长的影响  

Effects of different treatments on seed dormancy breaking and seedling growth of Ammodendron argenteum

作　　者：徐萍[1] 李进[1] 吕海英[1] 李永洁[1] 王璐[1] 

机构地区：[1]新疆师范大学生命科学学院,乌鲁木齐830054

出　　处：《广西植物》2014年第1期100-104,33,共6页Guihaia

基　　金：国家自然科学基金(31160094);国家国际科技合作项目(2010DFA92720-15);新疆师范大学研究生创新基金(20121207)

摘　　要：对银沙槐种子破除休眠的适宜方法及其幼苗生长进行研究。结果表明:破口和沙磨处理休眠破除效果最好,但容易引起种子腐烂死亡;分别用65、80和95℃热水处理种子,以95℃1 min破除种子休眠效果最好,且幼苗长势好,65℃效果最差,80℃可破除部分种子休眠,除80℃外延长热水处理时间可导致死种子数增加,95℃则引致大部分种子死亡;液氮浸种处理效果均显著,其中以液氮处理10 min效果最好,但幼苗多为不正常苗而致死;硫酸处理以浸种120 min效果最好,但处理时间过长可导致死种子数增多,且造成少数幼苗根部腐蚀死亡。综上所述,打破银沙槐种子休眠的较优处理方法是硫酸120 min浸种处理和95℃1 min热水处理。This paper studied the approriate method to break Ammodendron argenteum seed dormancy and the status of its seedling growth.The results showed that the most effective methods to break dormancy were slit testa and sand grinding.However,they could easily cause rot and death of the seeds.Use 65 ℃,80 ℃ and 95 ℃ hot water seeds treatment respectively and it was the 9 5 ℃ hot water treatment for 1 min that had the best breaking dormancy effect and the seeds grew well.65 ℃hot water treatment had the worst effect and 80 ℃hot water could partially break the seeds dormancy.Except seeds under 80 ℃,extending hot water treatment time would increase the seeds death toll and most of the seeds under 9 5 ℃ died in extension period.The effects of seed soaking with liquid nitrogen treament were all significant,in which 10 min’s seeds soaking was most effective in breaking domancy,nontheless,with abnor-mal seedling growth leading to death.Soaking with sulfuric acid for 120 min had the best effect in breaking seed dor-mancy.However,overtime treatment would increase the number of dead seeds and cause rot and death of a few seed-ling roots.In conclusion,soaking with sulfuric acid for 120 min and 95 ℃ hot water treatment for 1 min was the bet-ter method to break A.argenteum seed dormancy.

关 键 词：银沙槐 种子 休眠破除 幼苗生长 

分 类 号：Q945.35[生物学—植物学]