摘要:研究了大兴安岭地区珍珠梅（Sorbaria sorbifolia）、绣线菊（Spiraea salicifolia）、金露梅（Potentilla fruticosa）种子对热激和烟熏的萌发响应。热激分为干热激和湿热激。干热激处理水平分别为：60℃ 5 min、60℃ 15 min、90℃ 5 min、110℃ 5 min、150℃ 5 min；湿热激处理水平分别为：60℃ 5 min、60℃ 15 min、95℃ 5 min；烟熏处理水平分别为：5 min、10 min、20 min。结果表明：（1）在对干热激的响应上，珍珠梅种子的萌发率在60℃干热激处理15 min后显著提高（P<0.05），在110℃、150℃干热激处理5 min后显著下降（P<0.05）；绣线菊种子的萌发率在干热激处理后显著提高（P<0.05），平均萌发时间显著缩短（P<0.05）；金露梅种子的萌发率在150℃干热激处理5 min后显著下降（P<0.05）；（2）在对湿热激的响应上，珍珠梅和绣线菊种子在湿热激处理后停止萌发；金露梅种子在60℃湿热激处理15 min后停止萌发，在95℃湿热激处理5 min后几乎停止萌发，种子萌发率在60℃湿热激处理15 min后显著下降（P<0.05），平均萌发时间显著延长（P<0.05）；（3）在对烟熏的响应上，珍珠梅和金露梅种子的平均萌发时间在烟熏处理后显著延长（P<0.05）；绣线菊种子的萌发率在烟熏处理后显著提高（P<0.05），平均萌发时间显著缩短（P<0.05）。



Abstract:This study examines the seed germination response of Sorbaria sorbifolia, Spiraea salicifolia and Potentilla fruticosa to heat shock and smoke in Daxing'an Mountains. Seeds were exposed to the dry heat shock treatment (60℃ 5 min, 60℃ 15 min, 90℃ 5 min, 110℃ 5 min and 150℃ 5 min), the wet heat shock treatment (60℃ 5 min, 60℃ 15 min and 95℃ 5 min) and the smoke treatment (5 min, 10 min and 20 min). The results showed that: (1) in response to the dry heat shock, the seed germination percentage of S. sorbifolia increased significantly when seeds were subjected to the treatment of 60℃ for 15 min (P<0.05) and decreased significantly relative to the control when subjected to 110℃, 150℃ for 5 min (P<0.05). For S. salicifolia, the seed germination percentage increased significantly and the seed mean germination time shortened significantly when subjected to the treatment (P<0.05). For P. fruticosa, the seed germination percentage decreased significantly relative to the control when subjected to 150℃ for 5 min (P<0.05). (2) In response to the wet heat shock, the seed germination of S. sorbifolia and S. salicifolia stopped after the treatment. For P. fruticosa, the seed germination stopped when subjected to 60℃ for 15 min and nearly stopped when subjected to 95℃ for 5 min. For P. fruticosa, the seed germination percentage decreased significantly and the seed mean germination time extended significantly relative to the control when subjected to 60℃ for 15 min (P<0.05). (3) In response to the smoke, the seed mean germination time of S. sorbifolia and P. fruticosa extended significantly after the treatment (P<0.05). For S. salicifolia, the seed germination percentage increased significantly and the mean germination time shortened significantly relative to the control (P<0.05).





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