《植物生理学报》 2015, 51(7): 996-1002

细胞分裂素参与植物维管系统发育的信号转导研究进展

韩惠宾, 张国华, 王国栋^*

陕西师范大学生命科学学院, 药用资源与天然药物化学教育部重点实验室, 西安710062

通信作者：王国栋；E-mail: guodong_wang@snnu.edu.cn；Tel: 029-85310583

摘　要：

细胞分裂素是一类重要的植物激素, 广泛参与植物生长发育调控。在过去数十年, 使用生物化学、遗传学和基因组学方法, 以模式植物拟南芥为研究对象, 细胞分裂素调控植物维管系统发育方面取得了显著进步。研究表明, 细胞分裂素通过调控细胞分裂和分化而在维管系统发育中起重要作用。本文在对细胞分裂素信号转导简要评述的基础上, 着重讨论细胞分裂素调控和影响维管形成层细胞增殖和木质部分化的分子机制, 并对细胞分裂素影响树木次生维管组织发育等重要科学问题进行了展望。

关键词：细胞分裂素; 信号转导; 维管形成层; 木质部

收稿：2015-05-22   修定：2015-06-16

资助：国家自然科学基金(31200902和31271575)和中央高校基本科研业务费特别支持项目(GK201103005)。

Progress on Cytokinin Signaling in Plant Vascular Development

HAN Hui-Bin, ZHANG Guo-Hua, WANG Guo-Dong^*

College of Life Sciences, Shaanxi Normal University; Key Laboratory of Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, Xi’an 710062, China

Corresponding author: WANG Guo-Dong; E-mail: guodong_wang@snnu.edu.cn; Tel: 029-85310583

Abstract:

Cytokinin is an important plant hormone, which regulates numerous plant growth and developmental processes. Over the past decades, remarkable progress has been made to improve our understanding on the cytokinin signaling in plant vascular development through biochemical, genetic, and genomic approaches in Arabidopsis thaliana. It has been shown that cytokinin plays avital role in the development of plant vasculature by regulating cell division and cell differentiation. We reviewed briefly here cytokinin signal transduction mechanism, with an emphasis on cytokinin signaling pathway in regulating and influencing the division of vascular cambial cells and differentiation of (proto-)xylem. Furthermore, the perspective of the role of cytokinin in regulating the secondary vascular development was discussed.

Key words: cytokinin; signal transduction; vascular cambium; (proto-)xylem