Establishment and Influencing Factors of in vitro Culture System for Tracheary Elements Differentiation Comparative Study of Tracheary Elements in Peranemaceae from China Study on tracheary elements of three genera in Athyriaceae Tracheary Elements in Secondary Xylem of Actaea asiatica (Ranunculaceae) The Function of CLE Peptide Hormone-Mediated Signaling Transduction in the Development and Differentiation of Plant Vascular System Comparative Studies on Woods of Three Species of Normal and Dwarf Trees 中国特有植物海南草珊瑚管状分子的初步研究—草珊瑚属导管存在的例证 THE VASCULAR TISSUE AND THE TRACHEARY ELEMENT IN THE CALLUS ON HYPOCOTYL OF CABBAGE IN VITRO Apoptosis in the Development of Tracheary Elements in Plants Study on the Sporophytic Morphology of Five Species of Pteris L.