Abstract:
:The MEKK1-MKK2-MPK4 cascade is activated during cold acclimation. However, little is known regarding the perception of low temperature. In this study, we demonstrate that treatment of Arabidopsis with a membrane rigidifier, DMSO, caused MPK4 activation concomitantly with MEKK1 and MKK2 phosphorylation, as well as the cold-inducible gene COR15a expression. These processes are similar to the effects of cold treatment, whereas benzyl alcohol (BA), a membrane fluidizer, prevented such cold-induced events. Moreover, the DMSO-treated seedlings acquired freezing tolerance without cold acclimation. In contrast, the BA-pretreated seedlings did not show freezing tolerance. These results suggest that membrane rigidification activates this MAPK cascade and contributes to the acquisition of freezing tolerance.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Furuya T,Matsuoka D,Nanmori Tdoi
10.1016/j.febslet.2014.04.032subject
Has Abstractpub_date
2014-05-29 00:00:00pages
2025-30issue
11eissn
0014-5793issn
1873-3468pii
S0014-5793(14)00318-4journal_volume
588pub_type
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