Genetic Diversity and Genetic Variation of Populations Endangered Tree Cercidiphyllum japonicum POPULATION STRUCTURE AND DYNAMICS OF CERCIDIPHYLLUM JAPONICUM IN RIPARIAN ZONES OF THE SHENNONGJIA MOUNTAINOUS REGION, CENTRAL CHINA First record of Cercidiphylloxylon (Cercidiphyllaceae) from the Palaeocene of Fushun, NE China Influence of Vitrifying Cryopreservation Conditions on Cell Viability and Ultrastructure of Cercidiphyllum japonicum Normal Buds THE DISTRIBUTION AND CIRCULATION OF NUTRIENT ELEMENT CONTENTS AND ACCUMULATION IN THE YOUNG ARTIFICIAL CERCIDIPHYLLUM JAPONICUM COMMUNITY Grey correlation and cluster analysis on relationship between Cercidiphyllum japonicum community and its environment Morphogenesis of Pistillate Flowers of Cercidiphyllum japonicum (Cercidiphyllaceae) 中国连香树科的系统研究——Ⅱ.次生木质部的显微和超微结构 Chemical Constituents from the Bark of Cercidiphyllum japonicum Research on physiological and biochemical material’s change of Cercidiphyllum japonicum at different altitudes and adaptability Age structure and point pattern analysis of four Cercidiphyllum japonicum populations in three provinces of Hunan, Hubei and Anhui Seed Germination and Seedling Growth of Cercidiphyllum japonicum with PEG Treatment DNA Extraction of the Endangered tree Species Cercidiphyllum japonicum Based on the Modified Method of SDS-CTAB Population Genetic Structure and Variation of Endangered Cercidiphyllum japonicum in Shennongjia Area: The Mountain Barrier to Gene Flow Characteristics of seed germination of the rare plant Cercidiphyllum japonicum A Preliminary Study on the in Vitro Culture of Cercidiphyllum japonicum Sieb. et Zucc.