Effects of Pb stress on C, N and P accumulation and allocation in Populus deltoids × P. nigra seedlings The differences of water use efficiency (WUE) among three Populus deltoids clones, and the cloning and characterization of related gene, PdERECTA Physiological foundation for thedifferences of long-term water use efficiency among Populus deltoides clones STUDIES ON TRANSFORMATION OF MTLD/GUTD DIVALENT GENES TO POPULUS DELTOIDS×P. CATHAYANA A New Poplar Red Foliar Variety ‘Zhonghong’ Comparison of Photosynthetic Characteristics of Populus deltoides and Their F1 Hybrid Clones The cloning and expression of WUE-related gene (PdEPF1) in Populus deltoides×Populus nigra Effects of decomposing leaf litter of Populus deltoides on the growth and physiology of Brassica chinensis Populus nigra×Populus deltoids “108” Transformed the Chimeric Genes of Spider Insecticidal and Bt Study on Genetic Variation of Wood Properties in Three-generation Pedigree of Populus deltoids Marsh.×P.cathayana Rehd.