Document Detail

The calcium sensor PeCBL1, interacting with PeCIPK24/25 and PeCIPK26, regulates Na(+)/K (+) homeostasis in Populus euphratica.
MedLine Citation:
PMID:  23423605     Owner:  NLM     Status:  Publisher    
KEY MESSAGE : This paper is the first to directly link two types of ion channel regulation pathway into an emerging and complex CBL-CIPK signal system in wooden plant. In Arabidopsis thaliana, the calcineurin b-like (CBL) 1 gene has been shown to be necessary in response to abiotic stresses. In this study, we identified CBL1 in the woody plant Populus euphratica, designated as PeCBL1. Heterologous expression of PeCBL1 could build the resistance of sensitive phenotypes to low K(+) stress in the corresponding Arabidopsis cbl1/cbl9 mutant, and display a salt-sensitive phenotype compared with the mutant. Protein interaction analysis showed that PeCBL1 can interact with PeCIPK24, 25 and 26, and form different complexes of PeCBL-PeCIPK. To further investigate the mechanism of PeCBL1, we analyzed the fluxes of K(+) and Na(+) in roots of the wild-type Arabidopsis, cbl1/9 mutant, and PeCBL1 transgenic plants under low K(+) stress and high Na(+) stress. These analyses revealed that, compared to the cbl1/9 mutant, the PeCBL1 transgenic plant roots exhibited a higher capacity to absorb K(+) after exposure to low K(+) stress, and a lower capacity to discharge Na(+) after exposure to salt stress. The results suggest that CBL1 interacts with CIPK24, CIPK25 and CIPK26 to regulate Na(+)/K(+) homeostasis in Populus euphratica.
Hechen Zhang; Fuling Lv; Xiao Han; Xinli Xia; Weilun Yin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-20
Journal Detail:
Title:  Plant cell reports     Volume:  -     ISSN:  1432-203X     ISO Abbreviation:  Plant Cell Rep.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-2-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9880970     Medline TA:  Plant Cell Rep     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
National Engineering Laboratory of Forest Genetics and Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, People's Republic of China.
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