ArticleMolecular plant pathology2022
OhrR is a central transcriptional regulator of virulence in Dickeya zeae.
Article in Molecular plant pathology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 16 citations in OpenAlex.
- The MarR Family Transcriptional Regulator EmrR Negatively Regulates the Type III Secretion System (T3SS) and Positively Modulates Pathogenicity in Dickeya oryzae.Molecular plant pathology · 2026Article
- Effects of theBiofilm · 2025Article
- A Lrp/AsnC Family Transcriptional Regulator Lrp Is Essential for the Pathogenicity of Dickeya oryzae.Molecular plant pathology · 2025Article
- Article
- Article
- Characterization of the Arn lipopolysaccharide modification system essential for zeamine resistance unveils its new roles in Dickeya oryzae physiology and virulence.Molecular plant pathology · 2023Article
- MarR Family Transcriptional Regulators and Their Roles in Plant-Interacting Bacteria.Microorganisms · 2023Review
- Gram-negative bacteria resist antimicrobial agents by a DzrR-mediated envelope stress response.BMC biology · 2023Article
- OhrR is a central transcriptional regulator of virulence in Dickeya zeae.Molecular plant pathology · 2022Article
- Genomic and phenotypic biology of a novelFrontiers in microbiology · 2022Article
- Two-component system ArcBA modulates cell motility and biofilm formation inFrontiers in plant science · 2022Article
- Dickeya Manipulates Multiple Quorum Sensing Systems to Control Virulence and Collective Behaviors.Frontiers in plant science · 2022Review
Corrections and comments
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Authors and funding
10 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Dickeya zeae is the causal agent of rice foot rot disease. The pathogen is known to rely on a range of virulence factors, including phytotoxin zeamines, extracellular enzymes, cell motility, and biofilm, which collectively contribute to the establishment of infections. Phytotoxin zeamines play a critical role in bacterial virulence; signalling pathways and regulatory mechanisms that govern bacterial virulence remain unclear. In this study, we identified a transcriptional regulator OhrR (organic hydroperoxide reductase regulator) that is involved in the regulation of zeamine production in D. zeae EC1. The OhrR null mutant was significantly attenuated in its virulence against rice seed, potato tubers and radish roots. Phenotype analysis showed that OhrR was also involved in the regulation of other virulence traits, including the production of extracellular cellulase, biofilm formation, and swimming/swarming motility. DNA electrophoretic mobility shift assay showed that OhrR directly regulates the transcription of key virulence genes and genes encoding bis-(3'-5')-cyclic dimeric guanosine monophosphate synthetases. Furthermore, OhrR positively regulates the transcription of regulatory genes slyA and fis through binding to their promoter regions. Our findings identify a key regulator of the virulence of D. zeae and add new insights into the complex regulatory network that modulates the physiology and virulence of D. zeae.
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