摘要
以短梗大参种子为试验材料,通过光照、温度、基质、生长调节剂、沙藏处理,研究不同条件对其种子萌发特性的影响。结果表明:周期性光照条件下比全黑暗条件下萌发率高、萌发速度快;不同温度对种子萌发影响显著(p<0.05),15℃时萌发率最高,超过35℃时不萌发;不同基质对种子萌发率也有明显的影响,萌发率由高到低的基质依次为琼脂(27%)、滤纸(24%)、黄泥(15%)、沙子(13%)、珍珠岩(7%);萘乙酸和水杨酸对种子的萌发率无明显作用,赤霉素对种子的萌发率影响显著(p<0.05),且最适浓度为50mg.L-1;沙藏处理可显著(p<0.05)促进种子萌发,萌发指数相比非沙藏增加3.4倍、萌发率提高2.0倍、开始萌发时间提前10 d、根长增加85.93%。
The experiments were conducted to investigate the effects of different lights, temperatures, substrates, growth regulators and stratification treatments of on seed germination of Macropanax rosthornii. The results show that the germination rate and germination velocity were higher under the periodic light conditions than in dark. Different temperatures influenced seed germination significantly （p 〈 0.05） ; the seed germination rate was highest at 15 ~C but the seed can not germinate above 35 ~C ; the substrates were also important factors that affected the seed germination significantly and from high to low of germination rate were agar（27%）, filter paper（24%）, soil（15%）, sand（13%）, perlite（7%）; The effects of NAA and salicylic acid on germination rate of M. rosthornii seeds were not notable, GA3 had a significant effect on germination of seed （p 〈Z 0.05） , and its optimal concentration was 50 mg＇L-1; the treatments of stratification effected seed germination significantly （p 〈 0.05 ） ; the sand storage increased the seed germination index by 3.4 times, the germination rate increased by 2.0 times, the time of germination advanced by 10 days and the root length increased by 85.93% as compared with those in the non-sand storage.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2013年第8期57-62,共6页
Journal of Central South University of Forestry & Technology
基金
湖南省教育厅科学研究重点项目(11A130)
关键词
野生观赏植物
短梗大参
种子
萌发特性
wild ornamental plant
Macropanax rosthornii
seed
germination characteristics
作者简介
沈素贞（1989-），女，河南平顶山人，硕士，从事植物学研究
通讯作者：梁文斌，副教授，主要从事植物学研究；E-mail：topeasie@163．com
