6533b837fe1ef96bd12a3242

RESEARCH PRODUCT

Diverse stress signals activate the C1 subgroup MAP kinases ofArabidopsis

María Jesús MarcoteJuan CarbonellMiguel A. Perez-amadorDolores Ortiz-masiá

subject

AcclimatizationArabidopsisBiophysicsBiochemistryGene Expression Regulation Enzymologicchemistry.chemical_compoundGene Expression Regulation PlantStructural BiologyArabidopsisGeneticsASK1Kinase activityProtein kinase AMolecular BiologyJasmonic acidMAP kinase kinase kinasebiologyArabidopsis ProteinsKinaseJasmonic acidWoundHydrogen PeroxideCell Biologybiology.organism_classificationBiochemistrychemistryMitogen-activated protein kinasebiology.proteinMAP kinaseStress MechanicalMitogen-Activated Protein KinasesAbscisic AcidSignal Transduction

description

AbstractMitogen-activated protein kinase (MAPK) cascades play an important role in mediating stress responses in plants. In Arabidopsis, 20 MAPKs have been identified and classified into four major groups (A–D). Little is known about the role of group C MAPKs. We have studied the activation of Arabidopsis subgroup C1 MAPKs (AtMPK1/AtMPK2) in response to mechanical injury. An increase in their kinase activity was detected in response to wounding that was blocked by cycloheximide. Jasmonic acid (JA) activated AtMPK1/AtMPK2 in the absence of wounding. Wound and JA-induction of AtMPK1/2 kinase activity was not prevented in the JA-insensitive coi1 mutant. Other stress signals, such as abscisic acid (ABA) and hydrogen peroxide, activated AtMPK1/2. This report shows for the first time that regulation of AtMPK1/2 kinase activity in Arabidopsis might be under the control of signals involved in different kinds of stress.

yearjournalcountryeditionlanguage
2007-03-02FEBS Letters
https://doi.org/10.1016/j.febslet.2007.03.075