作者
Cecilia D'Angelo, Stefan Weinl, Oliver Batistic, Girdhar K Pandey, Yong Hwa Cheong, Stefanie Schültke, Veronica Albrecht, Britta Ehlert, Burkhard Schulz, Klaus Harter, Sheng Luan, Ralph Bock, Jörg Kudla
发表日期
2006/12/1
期刊
The Plant Journal
卷号
48
期号
6
页码范围
857-872
出版商
Blackwell Publishing Ltd
简介
Intracellular release of calcium ions belongs to the earliest events in cellular stress perception. The molecular mechanisms integrating signals from different environmental cues and translating them into an optimized response are largely unknown. We report here the functional characterization of CIPK1, a protein kinase interacting strongly with the calcium sensors CBL1 and CBL9. Comparison of the expression patterns indicates that the three proteins execute their functions in the same tissues. Physical interaction of CIPK1 with CBL1 and CBL9 targets the kinase to the plasma membrane. We show that, similarly to loss of CBL9 function, mutation of either CBL1 or CIPK1 renders plants hypersensitive to osmotic stress. Remarkably, in contrast to the cbl1 mutant and similarly to the cbl9 mutant, loss of CIPK1 function impairs abscisic acid (ABA) responsiveness. We therefore suggest that, by alternative complex …
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C D'Angelo, S Weinl, O Batistic, GK Pandey… - The Plant Journal, 2006