不同温度、GA_3和NaCl处理对狭叶薰衣草种子萌发的影响

Effects of different temperatures,GA_3 and NaCl treatments on the germination of Lavavdula angustifolia seeds

为探究打破种子休眠、提高萌发率的最适方法,以狭叶薰衣草为试材,研究了不同浓度GA_3、不同浓度NaCl溶液及不同温度对狭叶薰衣草种子萌发的影响。结果表明:用浓度为500mg/L GA_3浸种24h,能快速促进狭叶薰衣草种子萌发,显著提高种子的发芽率、发芽势及发芽指数,其值分别为82.22%、61.11%、4.94,且发芽效果最好;盐胁迫处理下,随着NaCl溶液浓度增加,种子的发芽率、发芽势及发芽指数均呈现先上升后下降的趋势,200mg/L时种子发芽率、发芽势及发芽指数最高,分别为40.00%、30.00%、1.36;种子最适宜的萌发温度为30℃,发芽率达23.33%。

In order to investigate the most suitable way of dormancy-breaking and improv the seed germination rate of Lavavdula angustifolia,the Lavavdula angustifolia was used as material to study the effects of different concentrations of GA_3,Nacl solution and temperatures on the seed germination of Lavandula angustifolia.The results showed that the concentration of 500 mg/L GA_3 with soaking seeds for 24 hcould promote the seed germination quickly and increase the seed germination rate,germination potential and germination index of Lavandula angustifolia significantly,which were 82.22%,61.11%,and 4.94 respectively,and the seeds showed the best germination effect.Under the treatments of salt stress,the seed germination rate,germination potential and germination index were all increased first and then decreased with the increase of NaCl concentration,and the seed germination rate,germination potential and germination index under 200 mg/L salt concentration were the highest,which were 40.00%、30.00%,and 1.36 respectively.The optimal germination temperature of seeds was 30℃,with the seed germination rate as 23.33%.