杨树维管组织细胞生物学研究进展

杨树是林业生产中的速生用材料种之一，也是林木研究中重要的目的树种。长期以来对杨树的应用基础性研究已取得了长足的进展，初步形成了林木维管组织形成和结构的基础知识，提出在杨树的茎端存在初生一次维管组织过渡区，阐明了杨树次生维管组织的结构特征及其发育影响因子与细胞化学变化；分子水平上的研究初步为维管组织发育的分子同理与调控机制的阐明提供了可靠的佐证。笔从广义的细胞生物学角度，对民树维管系统的解剖学和生理学研究的进展进行了评述。

The Cytobiological Advance on Vascular Tissue of Poplar

Poplar is not only one of the fast growing tree species for wood production in forestry, but also an important model tree species for forestry research. The xylem and cambial zone are the most studied tissues for reason of their obvious economic benefits. Great achievements have been made in the applicable basic research in poplar with the establishment of the rudimentary knowledge of vascular system in tree species. There is a transition zone from primary to secondary tissues in stem of poplar. The effective elements, cytochemical changes of development and the structural feature of vascular tissues are expounded; Some available evidences are sure to be provided for explaining the molecular mechanism of development of vascular tissues due to the molecular biology research. The review of the anatomical and physiological advance of vascular system in poplar was put forward in this paper in order to pass through the advance and prospects on related research fields of cytobiology in trees.