Journal
PLANT SIGNALING & BEHAVIOR
Volume 8, Issue 6, Pages -Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.24510
Keywords
rice; disease resistance; MAPK; salicylic acid; phosphorylation; proteasome
Categories
Funding
- Japanese Ministry of Agriculture, Forestry and Fisheries (Genomics for Agricultural Innovation) [GMA0001, PMI0008]
Ask authors/readers for more resources
WRKY45 transcription factor is a central regulator of disease resistance mediated by the salicylic acid (SA) signaling pathway in rice. SA-activated WRKY45 protein induces the accumulation of its own mRNA. However, the mechanism underlying this regulation is still unknown. Here, we report three lines of evidence showing that a mitogen-activated protein kinase (MAPK) cascade is involved in this regulation. An inhibitor of MAPK kinase (MAPKK) suppressed the increase in WRKY45 transcript level in response to SA. Two MAPKs, OsMPK4 and OsMPK6, phosphorylated WRKY45 protein in vitro. The activity of OsMPK6 was rapidly upregulated by SA treatment in rice cells. These results suggest that WRKY45 is regulated by MAPK-dependent phosphorylation in the SA pathway.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available