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本研究探讨了明日叶种子的变异性及不同化学试剂处理对其萌发的影响,以期找到提高其发芽率和发芽势的最佳处理方法。本研究以4℃保存的明日叶种子为材料,进行种子变异性分析评价;并分别采用不同浓度外源GA、SA、KNO_3和H_2O_2对明日叶种子进行不同时间浸种处理,研究其萌发情况。结果表明,明日叶种子平均长、宽、厚分别为1.11 cm、0.46 cm、0.10 cm,变异系数均达10%以上,而种子厚度的变异系数最大,达到33.68%;KNO_3、SA、H_2O_2浸种处理均能提高其发芽率和发芽势,分别高出CK的2.73倍和2.44倍、1.93和1.33倍、2.87倍和3.5倍。GA对明日叶种子萌发表现为抑制作用,外源KNO_3、SA、H_2O_2对明日叶种子萌发有促进作用,表现为H_2O_2>KNO_3>SA;0.7 mol/L KNO_3溶液浸种12 h或10%H_2O_2溶液浸泡10 min为明日叶种子催芽处理的最佳方法,能显著提高其发芽率和发芽势。
This study explored the variability of the leaves of tomorrow leaves and the effects of different chemical agents on their germination, in order to find the best way to improve their germination rate and germination potential. In this study, the seeds of Minglei stored at 4 ℃ were used as materials to evaluate the seed variability. The seeds were treated with different concentrations of exogenous GA, SA, KNO 3 and H 2 O 2 for soaking seeds at different times to study their germination. The results showed that the average length, width and thickness of the seeds were 1.11 cm, 0.46 cm and 0.10 cm, respectively, and the coefficients of variation were all above 10%, while the variation coefficient of seed thickness was the highest, reaching 33.68%. Seed treatment with KNO 3, SA and H 2 O 2 Can increase their germination rate and germination potential, respectively, 2.73 times and 2.44 times higher than CK, 1.93 and 1.33 times, 2.87 times and 3.5 times. GA could inhibit the seed germination of Tomorrow leaves. Exogenous KNO 3, SA and H 2 O 2 could promote the seed germination of Tomorrow leaves, which was H 2 O 2> KNO 3> SA. Soaking with 0.7 mol / L KNO 3 for 12 h or 10% H 2 O 2 solution 10 min is the best method for germination of seeds of Tomorrow leaf, which can significantly increase the germination rate and germination potential.