Megasporogenesis,Microsporogenesis and the Development of the Female and Male Gametophyte of Puccinellia tenuiflora Isolation and Characterization of IbNPR1 Gene from Sweet Potato(Ipomoea batatas Study on Grazing Yak Performance and Soil Nutrient Changes in Warm-season Pastures of Alpine Region Accumulation and Distribution of Manganese in Shoots of Apple Cultivars withDifferent Sensitivity to Manganese Chemical constituents and bioactivity of Kalimeris indica Advances in studies on antitumor activities of drugs for activating blood and resolving stasis in targeting fibninolytic system Advances in studies on antitumor activities of drugs for activating blood and resolving stasis in targeting fibninolytic system