中文摘要：

回顾植物顶端、根端和侧生分生组织的模式结构,以及干细胞区的WUSCHEL/CLAVATA（WUS/CLV）反馈调控机制研究进展发现,3种分生组织不仅都具有长期潜在的维持原始细胞启动状态的功能,而且可能都存在调控相邻干细胞分裂、分化的干细胞区。茎端分生组织中和根端分生组织中分别存在WUS/CLV和WOX5/CLE40反馈调控机制,2种反馈调控机制都具有维持干细胞区的分裂及其与其他组织形成之间的动态平衡功能。而有关植物尤其是木本植物的维管形成层组织中WUS/CLV反馈调控机制的报道不多,文中就这方面的研究进行综述和展望。

英文摘要：

Plant stem cells are characterized with two main features of the self-renewal and their potential to differentiate into multiple cell types.Plant stem cells are believed to have important roles in controlling the balance between organ formation and meristem maintenance.We review the studies on the organization models in the three kinds of meristems （shoot apical,root apical and vascular cambium） and the WUSCHEL/CLAVATA（WUS/CLV） feedback regulatory mechanisms in plant stem cell niche.In summary,the three kinds of meristems not only have similar potential for maintaining initials over long periods in the plant stem cell niche,but also have a similar cell niche （or zone） to regulate the adjacent stem cell division or differentiation by their structural comparison.A similar feedback regulatory mechanism exists in shoot apical meristem （SAM） and in root apical meristem （RAM）,respectively identified as WUS/CLV and WOX5/CLE40,and they all have a function in maintaining a balance between stem cell division and other tissues formation.There are limited reports on the WUS/CLV feedback regulatory mechanism in vascular cambium （VCAM）,especial on woody plants.However,we propose that there would be a similar mechanism in VCAM stem cell niche.