ArticleThe Plant cell2025
Gene editing of the E3 ligase PIRE1 fine-tunes reactive oxygen species production for enhanced bacterial disease resistance in tomato.
Article in The Plant cell, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Phytomelatonin receptor PMTR1 is crucial for melatonin-mediated plant broad-spectrum disease resistance.Plant cell reports · 2026Article
- Focus on Translational Research from Arabidopsis to Crop Plants and Beyond.The Plant cell · 2025Article
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Abstract
Reactive oxygen species (ROS) accumulation is required for effective plant defense. Accumulation of the Arabidopsis (Arabidopsis thaliana) NADPH oxidase respiratory burst oxidase homolog D (RBOHD) is regulated by phosphorylation of a conserved C-terminal residue (T912) leading to ubiquitination by the RING E3 ligase Pbl13-interacting RING domain E3 ligase (PIRE). Arabidopsis PIRE knockouts exhibit enhanced ROS production and resistance to the foliar pathogen Pseudomonas syringae. Here, we identified 170 PIRE homologs, which emerged in tracheophytes and expanded in angiosperms. We investigated the role of tomato (Solanum lycopersicum) PIRE homologs in regulating ROS production, RBOH stability, and disease resistance. Mutational analyses of residues corresponding to T912 in the tomato RBOHD ortholog, SlRBOHB, affected protein accumulation and ROS production in a PIRE-dependent manner. Using genome editing, we generated mutants in 2 S. lycopersicum PIRE (SlPIRE) homologs. SlPIRE1 edited lines (Slpire1) in the tomato cultivar M82 displayed enhanced ROS production upon treatment with flg22, an immunogenic epitope of flagellin. Furthermore, Slpire1 exhibited decreased disease symptoms and bacterial accumulation when inoculated with foliar bacterial pathogens P. syringae and Xanthomonas campestris. However, Slpire1 exhibited similar levels of colonization as wild type upon inoculation with diverse soil-borne pathogens. These results indicate that PIRE regulates RBOHs in multiple plant species and is a promising target for foliar disease control. This study also highlights the pathogen-specific role of PIRE, indicating its potential for targeted manipulation to enhance foliar disease resistance without affecting root-associated pathogenic interactions.
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