[ Objective ] The aim was to study the variation of seed weight, vitality and germination ability of wild S. pohuashanensis (Hance) Hedl.seeds in Northeast China,to provide the basis for the predict of its mature seeds quality and the scientific utilization of its wild resources. [ Method ] Weight, vitality and germination ability of wild S. pohuashanensis (Hance) Hedl. seeds were studied in 6 natural populations in its natural distribution areas of Northeast China with 2 types of seeds of newly collected in current autumn and past collected and stored for 2 years under low temperature in air-tight storage container. [ Result]The results showed that there were significant differences between individuals within populations for seed weight and vitality. There were significant negative correlations between the lowest air temperature and the two indexes. The variation scope of seed weight and vitality were reduced by air-tight storage at low temperature. The germination ability of seeds was the highest for Shanhe population ,but the lowest for Suiyang population and Bajiazi population,and moderate for the others. [ Conclusion]The S. pohuashanensis(Hance)Hedl. seeds has good resistance to cold ,and does the physiological after repening metabolism during storage.%[目的]研究东北地区野生花揪树[Sorbus pohuashanensis(Hance)Hedl.]种子的重量、生活力和发芽能力等,为野生花揪树成熟种子品质的预测及野生资源的科学利用提供依据.[方法]以东北分布区内6个天然群体新采集种子和低温密封贮藏2年的种子为试材,研究了种子重量、生活力和发芽能力的地理分异特点及贮藏对其影响.[结果]种子重量和生活力在个体间差异极显著,且与极端最低气温呈显著负相关关系;低温贮藏降低了种子重量和生活力的变异幅度;种子发芽能力以山河群体最高,绥阳和八家子群体较低,其余群体中等.[结论]花揪树种子具有极好的耐寒性,且在贮藏过程中进行了生理后熟代谢.
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