Reference - Detail
| RRC ID | 3099 |
|---|---|
| Author | Mao P, Duan M, Wei C, Li Y. |
| Title | WRKY62 transcription factor acts downstream of cytosolic NPR1 and negatively regulates jasmonate-responsive gene expression. |
| Journal | Plant Cell Physiol |
| Abstract |
Cytosolic NPR1 has been shown to be essential for the salicylic acid (SA)-mediated suppression of jasmonic acid (JA)-responsive gene expression. However, factors downstream of NPR1 in the cross-talk between SA and JA signaling are unclear. Here we show that Arabidopsis WRKY62, a member of WRKY group III transcription factors, was induced by methyl jasmonate (MeJA) and SA treatment. The presence of basal SA is required for the MeJA-induced WRKY62 expression, and both chemicals exhibit a synergistic effect on WRKY62 induction. In addition, upon treatment with an extremely low concentration of SA, cytosolic NPR1 controls the MeJA-induced expression of WRKY62. TGA transcription factors, which up-regulate SA-induced expression of WRKY62, are dispensable for the induction of WRKY62 in JA signaling. Genetic dissection of both wrky62 mutants and WRKY62-overexpressing plants indicated that WRKY62 down-regulates JA-responsive LOX2 and VSP2 expression. Our results demonstrate that WRKY62 acts downstream of cytosolic NPR1 and negatively regulates JA-responsive gene expression, suggesting that WRKY62 may be involved in the SA-mediated suppression of JA signaling. |
| Volume | 48(6) |
| Pages | 833-42 |
| Published | 2007-6-1 |
| DOI | 10.1093/pcp/pcm058 |
| PII | pcm058 |
| PMID | 17510065 |
| MeSH | Acetates / pharmacology* Active Transport, Cell Nucleus Amino Acid Sequence Arabidopsis / drug effects Arabidopsis / genetics Arabidopsis / metabolism* Arabidopsis Proteins / chemistry Arabidopsis Proteins / genetics Arabidopsis Proteins / metabolism* Basic-Leucine Zipper Transcription Factors / genetics Basic-Leucine Zipper Transcription Factors / metabolism Cyclopentanes / pharmacology* Cytosol / metabolism* Gene Expression Regulation, Plant / drug effects* Molecular Sequence Data Nuclear Proteins / genetics Nuclear Proteins / metabolism Oxylipins Salicylic Acid / pharmacology Transcription Factors / chemistry Transcription Factors / genetics Transcription Factors / metabolism* |
| IF | 4.062 |
| Times Cited | 79 |
| WOS Category | PLANT SCIENCES CELL BIOLOGY |
| Resource | |
| Arabidopsis / Cultured plant cells, genes | pst12552 |