Diverse stress signals activate the C1 subgroup MAP kinases of Arabidopsis.
FEBS Lett
; 581(9): 1834-40, 2007 May 01.
Article
em En
| MEDLINE
| ID: mdl-17433310
ABSTRACT
Mitogen-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.
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Base de dados:
MEDLINE
Assunto principal:
Arabidopsis
/
Proteínas Quinases Ativadas por Mitógeno
/
Proteínas de Arabidopsis
/
Aclimatação
Idioma:
En
Revista:
FEBS Lett
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Espanha