不同种源野生北沙参种子表型及萌发特性的研究

Study on Seed Phenotype and Germination Characteristics of Wild Glehnia littoralis Seeds from Different Provenances

以山东和辽宁5个不同种源野生北沙参(Glehnia littoralis Fr.Schmidt ex Miq.)种子为试材,测定了北沙参果实和种子的面积、长度、宽度、千粒重及不同温度下的发芽率等指标,探究不同种源北沙参种子表型的特征变化以及在不同温度下萌发特性的变化规律。结果表明,高纬度种源的北沙参果实、种子的面积和质量较低纬度种源小;相关分析表明,纬度与北沙参果实及种子千粒重均呈显著负相关(p<0.05);不同种源北沙参种子适宜的萌发温度范围均为20~25℃,且其发芽率与纬度呈显著正相关(p<0.05);辽宁省瓦房店情人岛和葫芦岛金石滩两地的野生北沙参种源发芽率较高。

In this study,the seeds of Glehnia littoralis from five different provenances in Shandong and Liaoning were used as experimental materials to determine area,length,width,1000-grain weight and germination rate of G.littoralis fruits and seeds and the germination rate and other indexes at different temperatures,and explore the phenotypic characteristics of different G.littoralis provenances and germination characteristics at different temperatures.The results showed that the fruit and seed area and quality of G.littoralis from high latitude provenances were smaller than those from low latitude provenances.In addition,correlation analysis showed that latitude was significantly negatively correlated with the 1000-seed weight of fruits and seeds of G.littoralis(p<0.05).The suitable germination temperature range of G.littoralis from different provenances was 20-25℃,and the germination rate was positively correlated with latitude(p<0.05).The germination rate of the provenances of wild G.littoralis was higher in Lover’s Island and Huludao Golden Pebble Beach of Liaoning province.