Cold Resistance of Zenia insignis from Different Provenances Study on the Difference in Expression Profiles of microRNA Among Leaf Organs of Triploid and Diploid Populus×euramericana cl.‘Zhonglin46’ Evaluation of Cold Resistance of Different Types of Magnolia grandiflora Studies on Anatomical Structures of Leaves and Their Drought Tolerance Features of Sedum aizoon L. and Sedum spectabilis Boreau Study on Excised Leaf Tissue Inoculation of Common Leaf Spot in Alfalfa Relationship Between the Leaf Tissue Characteristic and Drought Resistance of Iris lactea Pall. var. chinensis(Fisch.) Identification of Pathogen Causing Phoma Leaf Spot on Medicago sativa in Shaanxi Province Comparison of leaf tissue turnover for Leymus chinensis and Phragmites communis after grazing Research on Leaf Morphology and Cold Resistance of Alfalfa EFFECTS OF γ-RAYS ON VEGETABLE LEAF AND LEAF TISSUE RESISTANCE Effects of Exogenous Nitric Oxide on Photochemical Activity of Photosystem Ⅱ in Potato Leaf Tissue Under Non-stress Condition