MYC2 Differentially Modulates Diverse Jasmonate-Dependent Functions inArabidopsis

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ID: 298180
2007
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Abstract
The Arabidopsis thaliana basic helix-loop-helix Leu zipper transcription factor (TF) MYC2/JIN1 differentially regulates jasmonate (JA)-responsive pathogen defense (e.g., PDF1.2) and wound response (e.g., VSP) genes. In this study, genome-wide transcriptional profiling of wild type and mutant myc2/jin1 plants followed by functional analyses has revealed new roles for MYC2 in the modulation of diverse JA functions. We found that MYC2 negatively regulates Trp and Trp-derived secondary metabolism such as indole glucosinolate biosynthesis during JA signaling. Furthermore, MYC2 positively regulates JA-mediated resistance to insect pests, such as Helicoverpa armigera, and tolerance to oxidative stress, possibly via enhanced ascorbate redox cycling and flavonoid biosynthesis. Analyses of MYC2 cis binding elements and expression of MYC2-regulated genes in T-DNA insertion lines of a subset of MYC2-regulated TFs suggested that MYC2 might modulate JA responses via differential regulation of an intermediate spectrum of TFs with activating or repressing roles in JA signaling. MYC2 also negatively regulates its own expression, and this may be one of the mechanisms used in fine-tuning JA signaling. Overall, these results provide new insights into the function of MYC2 and the transcriptional coordination of the JA signaling pathway.
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openalex_W2061205797 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Bruno Dombrecht, Gang Xue, S. J. Sprague, John A. Kirkegaard, John J. Ross, James B. Reid, G. P. Fitt, Nasser Sewelam, Peer M. Schenk, John M. Manners, Kemal Kazan
Journal The Plant cell
Year 2007
DOI
10.1105/tpc.106.048017
URL
https://academic.oup.com/plcell/article-pdf/19/7/2225/36910095/plcell_v19_7_2225.pdf
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