几种外源激素对刺槐和红花槐种子萌发的影响

为了探讨几种外源激素处理对刺槐和红花槐种子萌发的影响,本研究以刺槐2个无性系及红花槐种子为供试材料,用浓度为10~50 mg/L的赤霉素(GA)、细胞分裂素(6-BA)、吲哚丁酸(IBA)、吲哚乙酸(IAA)对刺槐和红花槐种子进行处理,并对发芽率、发芽势、起始萌发时间、萌发时间进行统计分析。结果表明:在浓度为10~50 mg/L时,随着浓度的增大,GA、6-BA和IBA处理种子的发芽率和发芽势逐渐增大,而IAA处理的种子先增大后减小,在浓度为40 mg/L时均达到最大值;随着激素浓度的升高,3种材料都表现出起始萌发时间缩短,萌发时间延长的趋势;红花槐种子发芽率和发芽势均最低,低浓度的激素处理对红花槐种子的萌发效果不明显,高浓度的激素可以明显加快红花槐种子的萌发。通过本实验可以推断,一定浓度的外源激素会对刺槐和红花槐种子的萌发起到促进作用。

Several Exogenous Hormones: Effects on Seeds Germination of Robinia pseudoacacia and Robinia hispida

To investigate the effects of several exogenous hormones on seed germination of Robinia pseudoacacia andRobinia hispida , the seeds of two clones ofRobinia pseudoacacia andRobinia hispida were used as test materials. The seeds were treated with 10- 50 mg/L GA, 6- BA, IBA and IAA. The seed germination rate, germination potential, initial germination time, and germination time was counted and analyzed. The results showed that with 10- 50 mg/L GA, 6- BA and IBA, the seed germination rate and germination potential increased with the increasing concentrations of exogenous hormones. While with IAA treatment, the germination rate and germination potential increased at first and then decreased, and they all reached a peak by being treated with 40 mg/L IAA. Along with the increasing concentrations, the three materials exhibited the same result: the initial germination time was reduced, and the germination time was prolonged. The seed germination rate and germination potential of Robinia hispida were the lowest. The germination effect of Robinia hispida treated by low concentration of hormones was not significant. High concentrations could significantly accelerate the germination of Robinia hispida . Taken together, certain concentration of exogenous hormones could promote the seed germination of Robinia pseudoacacia and Robinia hispida