ArticleMolecular plant pathology2023
Transcriptional regulator Sar regulates the multiple secretion systems in Xanthomonas oryzae.
Article in Molecular plant pathology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 5 citations in OpenAlex.
- GpaR Drives Type III Secretion and Virulence Through Direct Activation of the HrpG-HrpX Cascade in Xanthomonas oryzae pv. oryzicola.Molecular plant pathology · 2026Article
- Article
- Functional replacement of ancestral antibacterial secretion system in a bacterial plant pathogen.Nature ecology & evolution · 2025Article
- The pathogenicity-associated regulators participating in the regulatory cascade for RaxSTAB and RaxX in Xanthomonas oryzae pv. oryzae.Molecular plant pathology · 2024Article
- The Transcriptional Regulator TfmR Directly Regulates Two Pathogenic Pathways inInternational journal of molecular sciences · 2024Article
- Transcriptional regulator Sar regulates the multiple secretion systems in Xanthomonas oryzae.Molecular plant pathology · 2023Article
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Authors and funding
7 authors at 3 institutions in 1 country.
Funding
Abstract
Xanthomonas oryzae pv. oryzae (Xoo) is a notorious plant pathogen that causes leaf blight of rice cultivars. The pathogenic bacteria possess numerous transcriptional regulators to regulate various biological processes, such as pathogenicity in the host plant. Our previous study identified a new master regulator PXO_RS20790 that is involved in pathogenicity for Xoo against the host rice. However, the molecular functions of PXO_RS20790 are still unclear. Here, we demonstrate that transcriptional regulator Sar (PXO_RS20790) regulates multiple secretion systems. The RNA-sequencing analysis, bacterial one-hybrid assay, and electrophoretic mobility shift assay revealed that Sar enables binding of the promoters of the T1SS-related genes, the avirulence gene, raxX, and positively regulates these genes' expression. Meanwhile, we found that Sar positively regulated the T6SS-1 clusters but did not regulate the T6SS-2 clusters. Furthermore, we revealed that only T6SS-2 is involved in interbacterial competition. We also indicated that Sar could bind the promoters of the T3SS regulators, hrpG and hrpX, to activate these two genes' transcription. Our findings revealed that Sar is a crucial regulator of multiple secretion systems and virulence.
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