Abstract: Taking four species of wild Primula (P. polyneura, P. sikkimensis, P. bulleyana and P. pulverulenta) as the experimental materials, the influence of the seed morphology, light, and GA3 on their seed germination was studied. The results revealed that the seed morphologies of four species of Primula were various. The thousand seed weight of P. sikkimensis?was the largest (0.458 g); while that of P. pulverulenta?was the smallest (0.192 g). Light and GA3 treatments with different concentrations had different influences on the seed germination of four kinds of Primula. The effect of light on seed germination of P. polyneura?was the best, followed by P. sikkimensis?and P. bulleyana. However, it had no obvious promoting effect on P. pulverulenta. Under the condition of light, the treatment with 400 mg·L-1 GA3 had a better germination effect on P. bulleyana?and P. pulverulenta, which significantly increased the germination rate, and shortened the germination duration. The suitable GA3 concentration for P. sikkimensis?seed germination was 200 mg·L-1.

Key words: Primula, GA3, light, seed germination

摘要： 以多脉报春Primula polyneura、钟花报春P. sikkimensis、桔红灯台报春P. bulleyana和粉被灯台报春P. pulverulenta的种子为材料，研究其形态及光照、GA3对种子萌发的影响。结果表明，4种报春花种子形态各异，钟花报春种子质量最大，千粒重达0.458 g，粉被灯台报春种子质量最小，千粒重为0.192 g。光照处理及不同浓度GA3处理对4种报春花种子萌发的影响存在差异。光照对多脉报春的萌发效果最好，其次为钟花报春与桔红灯台报春，对粉被灯台报春无明显促进作用。光照条件下，400 mg·L-1 GA3处理对桔红灯台报春和粉被灯台报春的萌发效果较好，发芽率显著提高，发芽持续时间缩短；钟花报春萌发适宜的GA3浓度为200 mg·L-1。

关键词: 报春花, GA3, 光照, 种子萌发