Effects of drought stress on the growth, photosynthetic characteristics, and active oxygen metabolism of poplar seedlings. The correlation analysis between Populus Simonii ecophysiological indexes and environmental factors The structural traits of Populus euphratica heteromorphic leaves and their correlations Resistance to Insect of Transgenic Populus tomentosa Clone-85 plants with Two Insect-resistant Genes Meiosis Stages and Their Corresponding Relation of Populus adenopoda Megasporocytes and Microsporocytes Comparative Study of Photosynthetic and Chlorophyll Fluorescence Characteristics of Populus euphratica and P. pruinosa Intraspecific and Interspecific Competitions of the Dominating Plant Populus euphratica in the Desert of Tarim Effects of Salt Stress on Photosynthetic Pigment and Gas Exchange Characteristics of the Leaves of Populus Seedlings Difference of Ultrastructure and Photosynthetic Characteristics between Lanceolate and Broad-ovate Leaves in Populus euphratica Transformation of Drought and Salt Resistant Gene ( DREB1C ) in Populus×euramericana cv. Nanlin 895 Genome Wide Analysis of NBS Encoding Disease Resistance Genesin Populus trichocarpa Isolation and Single Nucleotide Polymorphisms Analysis of Stem Cell Organizer Gene Wuschel in Populus tomentosa Prokaryotic Expression and Functional Analysis of 5′ Fragment of PtCDD Gene from Populus tomentosa Wood Property Estimation and Selection of Populus tomentosa Growth Characteristic of Populus×xiaohei Plantaion in Sand Land of North China Comparison on the Pulping Property between Juvenile and Mature Wood of Populus simonii×P.nigra Biomass and Distribution Patterns of Populus×xiaohei Plantation in Sandy Land of North China Change of Endogenous Plant Hormones of Vitrificated Plants of Hybrid Aspen by Tissue Culture Cloning and Expression Analysis of PtFAD2 Gene Encoding the Endoplasmic Reticulum Fatty Acid 18∶1 Desaturase in Populus tomentosa Effects of Soil Water Stress on Light Response Curves of Photosynthesis of Populus euphratica and Populus pruinosa Isolation and Functional Analysis of a MADS Box Gene in Populus tomentosa Genetic Analysis of Fiber Traits and Microfibrillar Angles on Clones of Populus tomentosa Fractal Characteristics of Tree Crown of Populus×xiaozhuanica in Shelterbelts Sequencing of cDNA Clones and Analysis of the Expressed Sequenced Tags(ESTs)Properties of Male Floral Buds of Populus deltoides Isolation and Characterization of Two NaCl-Inducible Vacuolar Na+/H+ Antiporter Genes (PtNHX1, PtNHX6) in Populus Effects of Mixed Forest of Ailanthus altissima and Populus bolleana on Host Choice of Anoplophora glabripennis TAXONOMIC STUDIES ON POPULUS L.IN SOUTHWESTERN CHINA(Ⅱ) TAXONOMIC STUDIES ON POPULUS L. IN SOUTHWESTERN CHINA (Ⅰ) THE POPULUS EUPHRATICA FORESTS IN GANSU PROVINCE Genetic Differentiation of Populus cathayana Organogenesis and Plantlet Regeneration in Vitro of Populus euphratica Optimization of Leaf Regeneration and Genetic Transformation System of Populus tomentosa Variations of Growth and Leaf Traits of Intraspecific Hybridization Clones of Populus tomentosa Cloning and Transient Expression Analysis of Promoter of PnsICE1 from Populus simonii×P.nigra Study on Optimization of Transformation of Populus tomentosa RAPD Linkage Mapping in a Populus adenopoda×P. alba F1 Family The Secretory Stigmas in Populus: Development, Cytochemistry, Ultrastructure and Their Relation to Intersectional Incompatibility Influence of exogenous N resource on triploid Populus tomentosa leaf decomposition Genetic Diversity Analysis of Populus yunnanensis by SRAP Markers Study on the water physio-ecological characteristics of Populus beijingensis Salt-responsive MicroRNAs in Populus euphratica by Deep Sequencing Rapid Propagation and Regeneration System of Populus simonii×Populus nigra Establishment and Regeneration of Suspension Cell Lines in Hybirds of (Populus pseudo-simonii×P.nigra ‘Zhenyin3#’)×P.×beijingensis Variation Analysis of Growth Traits of Transgenic Populus simonii×P.nigra Clones Carrying TaLEA Gene Carbohydrate,Soluble Protein and Morphometric Changes of Leaves of Populus euphratica Oliv. Individuals under Different Developmental Stages Isolation and Functional Analysis of FLC Gene from Poplar (Populus simonii×Populus nigra) Relationship between Anatomical Structures of Populus euphratica and Ecoenvironment STUDY ON POPULATION GENETIC STRUCTURE GEOGRAPHICAL PROVENANCE OF POPULUS EUPHRATlCA OLIV. AND THEIR INTERACTION WITH ENVIRONMENT PRELIMINARY STUDIES ON THE POPULUS DAVIDIANA FORESTS IN QINLING MOUNTAINS AND LOESS PLATEAU OF NORTHERN SHAANXI PROVINCE AN ANATOMICAL STUDY ON THE PETIOLE IN SOME SPECIES OF POPULUS AND ITS SYSTEMATIC SIGNIFICANCE Mass Losses and Nitrogen and Phosphorous Dynamics during the Decomposition of Different Organic Residues of Triploid Populus tomentosa Isolation and Expression of Eukaryotic Translation Initiation Factor 5A2 in Populus tomentosa Transformation of BG2 Gene into Populus×euramericana cv.‘Neva’and Resistance of the Transgenic Poplar to Canker Disease Effects of Apoplastic Ion Contents in the Tender Stems of Two Populus Cultivars on Gas Exchange Parameters Under Salt Stress Comparison on Characteristics of the Fast Chlorophyll Fluorescence Induction Kinetics between Pinus Species and Populus Species Research Progress in the Remediation of Heavy Metal Contaminated Soils with Populus Effects of NaHCO3 Stress on Photosynthetic Capabilities and Seedling Growth in Populus bachofenii×P. pyramidalis ‘ROZ’ Spatial Distribution Pattern of Populus davidiana and Betula platyphylla Populations in a Typical Natural Secondary Forest in Rocky Mountain Area of Northern Hebei Differences in Growth and Physiological Characteristics in Different Growth Vigor Clones of Populus deltoides Source Area in-FLUX Measurements by FSAM Model over the Populus deltoides Plantation in Yueyang Responses of Chlorophyll Fluorescence Parameters in Four Garden Tree Species to Desiccation Stress and Analysis of Their Drought Tolerance Meiosis and Chromosome Behavior of Microsporocytes in Populus adenopoda Maxim Studies on the Antipyreiic and Analgesic Constituents of Leaves of Populus tomentosa Carr Pharmacognostical Studies on Resina Populi A new efficient method for rapid in-vitro shoot regeneration on leaf explants of Poplar 741 INDUCTION, DIFFERENTIATION AND PLANT REGENERATION OF TRIPLOID CALLI OF POPULUS TOMENTOSA STUDY ON PHYSIOLOGICAL ECOLOGICAL CHARACTERISTICS OF POPULUS PSEUD -SIMONII Species Diversity and Community Stability of Populus simonii Plantations in Different Habitats in Hilly Area of the Loess Plateau Difference in δ13C and gas exchange parameters among Populus tomentosa clones Dynamics Modeling of Stand Density Effects of Populus davidiana Forest Potential Effect of Extracts of Roots of Malus pumila and Populus canadensis on Wheat Growth A Vegetational Survey of Valley Forests in the Pediment Plain of Altai District of Xinjiang Contributions of aboveground litter to soil respiration in coniferous and deciduous plantations Analysis adventitious shoot polarization and plantlet regeneration of Poplar- Zhonglinmeihe In-vitro regeneration of Populus langfangensis 3 for transformation and micropropagation A new variety of Populus from China A study on the spatial distribution and quantative characteristic of Populus euphratica and Populis pruinosa fruits Isolation of plasma membrane from Populus euphratica by two-phases partition and properties of its H~+-ATPase Spatial Distribution Patterns and Dynamics of Major Population in Populus euphratica Forest in Upper Reaches of Tarim River Isolation and Purification of Mesophyll Protoplasts of Populus alba L. var. pyramidalis