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Upstream kinases of plant SnRKs are involved in salt stress tolerance

Opened Access Upstream kinases of plant SnRKs are involved in salt stress tolerance

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Autor: Barajas López, Juan de Dios
Moreno, José Ramón
Gamez Arjona, Francisco M.
Pardo, Jose M.
Punkkinen, Matleena
Quintero, Francisco Javier
Fecha: 2018
Publicado en: Plant Journal, 93, 107-118.
Tipo de documento: Artículo
Resumen: Sucrose non-fermenting 1-related protein kinases (SnRKs) are important for plant growth and stress responses. This family has three clades: SnRK1, SnRK2 and SnRK3. Although plant SnRKs are thought to be activated by upstream kinases, the overall mechanism remains obscure. Geminivirus Rep-Interacting Kinase (GRIK)1 and GRIK2 phosphorylate SnRK1s, which are involved in sugar/energy sensing, and the grik1-1 grik2-1 double mutant shows growth retardation under regular growth conditions. In this study, we established another Arabidopsis mutant line harbouring a different allele of gene GRIK1 (grik1-2 grik2-1) that grows similarly to the wild-type, enabling us to evaluate the function of GRIKs under stress conditions. In the grik1-2 grik2-1 double mutant, phosphorylation of SnRK1.1 was reduced, but not eliminated, suggesting that the grik1-2 mutation is a weak allele. In addition to high sensitivity to glucose, the grik1-2 grik2-1 mutant was sensitive to high salt, indicating that GRIKs are...
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Cita: Barajas López, J.d.D., Moreno, J.R., Gamez Arjona, F.M., Pardo, J.M., Punkkinen, M. y Quintero, F.J. (2018). Upstream kinases of plant SnRKs are involved in salt stress tolerance. Plant Journal, 93, 107-118.
Tamaño: 1.222Mb
Formato: PDF

URI: http://hdl.handle.net/11441/67879

DOI: 10.1111/tpj.13761

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