AI Article Synopsis
- - The interaction between salicylic acid (SA) and jasmonic acid (JA) helps plants effectively respond to attackers, with SA often taking priority over JA in gene regulation.
- - In Arabidopsis, studies show that SA negatively influences JA-responsive genes like PDF1.2, highlighting SA's dominant role in defense signaling.
- - Chromatin immunoprecipitation analysis indicates that SA does not alter histone H3 acetylation at the PDF1.2 promoter, suggesting chromatin changes are not significant in the SA-JA interaction.
Article Abstract
Cross-talk between salicylic acid (SA) and jasmonic acid (JA) defense signaling pathways allows a plant to finely tune its response to the attacker encountered. In Arabidopsis, pharmacological experiments revealed that SA exerts a strong antagonistic effect on JA-responsive genes, such as PDF1.2, indicating that the SA pathway can be prioritized over the JA pathway. We investigated the putative role of histone modifications in the regulation of SA-mediated suppression of PDF1.2 transcription. Chromatin immunoprecipitation analysis using an antibody directed against acetylated histone H3 revealed that SA does not affect the association of this histone modification at the PDF1.2 promoter, suggesting that chromatin remodeling does not play a major role in SA/JA cross-talk.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2686002 | PMC |
| http://dx.doi.org/10.4161/cib.1.2.6997 | DOI Listing |
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