东北地区野生花楸树种子重量·生活力和发芽能力变异研究  

Study on the Variation of Seed Weight,Vitality and Germination Ability of Wild S.pohuashanensis (Hance) Hedl. in Northeast China

作　　者：郭敏[1] 沈海龙[1] 杨玲[1] 

机构地区：[1]东北林业大学,辽宁哈尔滨150040

出　　处：《安徽农业科学》2011年第19期11576-11579,11587,共5页Journal of Anhui Agricultural Sciences

基　　金：国家"十一五"林业科技支撑项目(2006BAD03A0405)

摘　　要：[目的]研究东北地区野生花楸树[Sorbus pohuashanensis(Hance)Hedl.]种子的重量、生活力和发芽能力等,为野生花楸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]花楸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。[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.

关 键 词：花楸树 天然群体 种子重量 种子生活力 种子发芽能力 

分 类 号：S722.13[农业科学—林木遗传育种]