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.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Ortiz-Masia D,Perez-Amador MA,Carbonell J,Marcote MJdoi
10.1016/j.febslet.2007.03.075subject
Has Abstractpub_date
2007-05-01 00:00:00pages
1834-40issue
9eissn
0014-5793issn
1873-3468pii
S0014-5793(07)00353-5journal_volume
581pub_type
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