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PMID:17486125

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Citation

Pandey, GK, Cheong, YH, Kim, BG, Grant, JJ, Li, L and Luan, S (2007) CIPK9: a calcium sensor-interacting protein kinase required for low-potassium tolerance in Arabidopsis. Cell Res. 17:411-21

Abstract

Potassium is one of the major macro-nutrients essential for a number of cellular processes in plants. Low potassium level in the soil represents a limiting factor for crop production. Recent studies have identified potassium transporters that are involved in potassium acquisition, and some of them are critical for potassium nutrition under low potassium conditions. However, little is understood on the molecular components involved in low potassium signaling and responses. We report here the identification of a calcineurin B-like protein-interacting protein kinase (CIPK9) as a critical regulator of low potassium response in Arabidopsis. The CIPK9 gene was responsive to abiotic stress conditions, and its transcript was inducible in both roots and shoots by potassium deprivation. Disruption of CIPK9 function rendered the mutant plants hypersensitive to low potassium media. Further analysis indicated that K(+) uptake and content were not affected in the mutant plants, implying CIPK9 in the regulation of potassium utilization or sensing processes.

Links

PubMed Online version:10.1038/cr.2007.39

Keywords

Arabidopsis/genetics; Arabidopsis/physiology; Arabidopsis Proteins/genetics; Arabidopsis Proteins/physiology; Calcium Signaling; Cold Temperature; Gene Expression Regulation, Plant; Osmotic Pressure; Plants, Genetically Modified; Potassium/pharmacology; Potassium/physiology; Protein Kinases/genetics; Protein Kinases/physiology; Protein-Serine-Threonine Kinases; RNA, Messenger/metabolism

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

ARATH:CIPK9

involved_in

GO:0010555: response to mannitol

ECO:0000270: expression pattern evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:CIPK9

involved_in

GO:0009651: response to salt stress

ECO:0000270: expression pattern evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:CIPK9

involved_in

GO:0009611: response to wounding

ECO:0000270: expression pattern evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:CIPK9

involved_in

GO:0009409: response to cold

ECO:0000270: expression pattern evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:CIPK9

involved_in

GO:0051365: cellular response to potassium ion starvation

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:CIPK9

involved_in

GO:0043266: regulation of potassium ion transport

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete


See also

References

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