用毛细管电泳结合聚合酶链式反应-单链构象多态性技术（PCR-CE-SSCP）进行西藏沙棘根际土壤及根瘤样品中Frankia放线菌的研究，探索青藏高原东缘高寒山区高寒灌丛西藏沙棘根际土壤与根瘤样品中Frankia放线菌的关系，阐明西藏沙棘根系中Frankia的来源及其根际土壤与根瘤样品中Frankia的差异，研究青藏高原东缘不同生境下西藏沙棘根际土壤及根瘤样品中Frankia放线菌的分类鉴定，揭示生境对根际土壤及根瘤样品中Frankia放线菌的影响。为特殊生境沙棘属植物共生固氮Frankia放线菌的研究及揭示植物-微生物相互作用机制有一定的现实意义。

The Frankia actinomycetes of Hippophae tibetana rhizosphere soil and root nodule samples were studied based on PCR-CE-SSCP. The relationship of Frankia which existed in the Hippophae tibetana rhizosphere soil and root nodule samples was explored in the Eastern Qinghai-Tibet Plateau.The sources of Frankia of Hippophae tibetana roots and the differences between Hippophae tibetana rhizosphere soil and root nodule samples will be clarified.The Frankia will be classified and identified by PCR-CE-SSCP in Hippophae tibetana rhizosphere soil and root nodule samples in the different habitats.The influence of the habitats in the rhizosphere soil and root nodule samples for Frankia actinomycetes was revealed. The study for Hippophae tibetana and nitrogen-fixing Frankia in the special habitats will reveal Frankia actinomycetes significance and provide the theoretical basis for the study of the special ecosystem, rhizosphere microbes and plant roots.