Plant two-component systems: principles, functions, complexity and cross talk

被引:115
作者
Grefen, C [1 ]
Harter, K [1 ]
机构
[1] Univ Cologne, Inst Bot, D-50931 Cologne, Germany
关键词
two-component system; histidine kinase; phosphotransfer protein; response regulator; osmoregulation; signalling; (cytokinin; ethylene);
D O I
10.1007/s00425-004-1316-4
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Two-component systems have emerged as important sensing/response mechanisms in higher plants. They are composed of hybrid histidine kinases, histidine-containing phosphotransfer domain proteins and response regulators that are biochemically linked by Histo-Asp phosphorelay. In plants two-component systems play a major role in cytokinin perception and signalling and contribute to ethylene signal transduction and osmosensing. Furthermore, developmental processes like megagametogenesis in Arabidopsis thaliana and flowering promotion in rice (Oryza sativa) involve elements of two-component systems. Two-component-like elements also function as components of the Arabidopsis circadian clock. Because of the molecular mode of signalling, plant two-component systems also appear to serve as intensive cross talk and signal integration machinery. In this review we summarize the present knowledge about the principles and functions of two-component systems in higher plants and address several critical points with respect to cross talk, signal integration and specificity.
引用
收藏
页码:733 / 742
页数:10
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