干旱胁迫对两种不同基因型耧斗菜种子萌发特性的影响

摘要

为探讨2种不同基因型耧斗菜的耐旱性,用5%、10%、15%、20%、25%的PEG-6000溶液处理耧斗菜种子,研究PEG-6000模拟干旱胁迫对2种不同基因型耧斗菜萌发的影响.结果表明:干旱胁迫抑制了耧斗菜种子的萌发,2种不同基因型材料的种子发芽率、发芽势、相对发芽率、发芽指数均显著降低(P<0.05).低浓度PEG-6000促使萌发高峰期提前,而且加快了种子萌发进程,高浓度则反之.在相同的PEG-6000浓度处理水平下,白鹭耧斗菜表现出的耐旱性强于黄凤耧斗菜.%In order to explore the drought resistance of two different genotypes of Aquilegia vulgaris,the seeds of Aquilegia vulgaris were treated by 5%,10%,15%,20% and 25% of PEG-6000.The results showed that the germination rate,germination potential,relative germination rate and germination index of seeds with two different genotypes were significantly decreased under drought stress(P<0.05).In addition,low concentration of PEG-6000 promoted the germination peak earlier,and accelerated the process of seed germination,while high concentration was opposite.At the same concentration of PEG-6000,Aquilegia vulgaris of Bailu showed stronger drought tolerance than Aquilegia vulgaris of Huangfeng.