Arabidopsis mitogen-activated protein kinase kinases MKK1 and MKK2 have overlapping functions in defense signaling mediated by MEKK1, MPK4, and MKS1.
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Arabidopsis mitogen-activated protein kinase kinases MKK1 and MKK2 have overlapping functions in defense signaling mediated by MEKK1, MPK4, and MKS1. / Qiu, Jin-Long; Zhou, Lu; Yun, Byung-Wook; Nielsen, Henrik Bjørn; Fiil, Berthe Katrine; Petersen, Klaus; Mackinlay, Jim; Loake, Gary J; Mundy, John; Morris, Peter C.
In: Plant Physiology, Vol. 148, No. 1, 2008, p. 212-22.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Arabidopsis mitogen-activated protein kinase kinases MKK1 and MKK2 have overlapping functions in defense signaling mediated by MEKK1, MPK4, and MKS1.
AU - Qiu, Jin-Long
AU - Zhou, Lu
AU - Yun, Byung-Wook
AU - Nielsen, Henrik Bjørn
AU - Fiil, Berthe Katrine
AU - Petersen, Klaus
AU - Mackinlay, Jim
AU - Loake, Gary J
AU - Mundy, John
AU - Morris, Peter C
PY - 2008
Y1 - 2008
N2 - The Arabidopsis (Arabidopsis thaliana) MKK1 and MKK2 mitogen-activated protein kinase kinases have been implicated in biotic and abiotic stress responses as part of a signaling cascade including MEKK1 and MPK4. Here, the double loss-of-function mutant (mkk1/2) of MKK1 and MKK2 is shown to have marked phenotypes in development and disease resistance similar to those of the single mekk1 and mpk4 mutants. Because mkk1 or mkk2 single mutants appear wild type, basal levels of MPK4 activity are not impaired in them, and MKK1 and MKK2 are in part functionally redundant in unchallenged plants. These findings are confirmed and extended by biochemical and molecular analyses implicating the kinases in jasmonate- and salicylate-dependent defense responses, mediated in part via the MPK4 substrate MKS1. In addition, transcriptome analyses delineate overlapping and specific effects of the kinases on global gene expression patterns demonstrating both redundant and unique functions for MKK1 and MKK2.
AB - The Arabidopsis (Arabidopsis thaliana) MKK1 and MKK2 mitogen-activated protein kinase kinases have been implicated in biotic and abiotic stress responses as part of a signaling cascade including MEKK1 and MPK4. Here, the double loss-of-function mutant (mkk1/2) of MKK1 and MKK2 is shown to have marked phenotypes in development and disease resistance similar to those of the single mekk1 and mpk4 mutants. Because mkk1 or mkk2 single mutants appear wild type, basal levels of MPK4 activity are not impaired in them, and MKK1 and MKK2 are in part functionally redundant in unchallenged plants. These findings are confirmed and extended by biochemical and molecular analyses implicating the kinases in jasmonate- and salicylate-dependent defense responses, mediated in part via the MPK4 substrate MKS1. In addition, transcriptome analyses delineate overlapping and specific effects of the kinases on global gene expression patterns demonstrating both redundant and unique functions for MKK1 and MKK2.
U2 - 10.1104/pp.108.120006
DO - 10.1104/pp.108.120006
M3 - Journal article
C2 - 18599650
VL - 148
SP - 212
EP - 222
JO - Plant Physiology
JF - Plant Physiology
SN - 0032-0889
IS - 1
ER -
ID: 6446424