ArticleMolecular plant pathology2021
Synergistic interaction between the type III secretion system of the endophytic bacterium Pantoea agglomerans DAPP-PG 734 and the virulence of the causal agent of olive knot Pseudomonas savastanoi pv. savastanoi DAPP-PG 722.
Article in Molecular plant pathology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 19 citations in OpenAlex.
- Omics approaches to unveil biotic stress responses in olive: current knowledge and the future.Journal of experimental botany · 2026Review
- Whole-genome characterization and analysis of Pantoea agglomerans R6: a genomic insight into its pathogenicity and resistance as a potential opportunistic plant pathogen.BMC genomics · 2026Article
- First genomic report of Enterobacter mori strain Pna8 from Pandanus conoideus with antagonistic activity against plant wilt pathogen Fusarium odoratissimum and Ralstonia solanacearum.World journal of microbiology & biotechnology · 2026Article
- Secreted LysM proteins are required for niche competition and full virulence in Pseudomonas savastanoi during host plant infection.PLoS pathogens · 2025Article
- BacteriaPlants (Basel, Switzerland) · 2025Article
- Comparative sequence analysis of pPATH pathogenicity plasmids inFrontiers in plant science · 2023Article
- Genomic delineation and description of species and within-species lineages in the genusFrontiers in microbiology · 2023Article
- Comparative genomics to examine the endophytic potential of Pantoea agglomerans DAPP-PG 734.BMC genomics · 2022Article
- Beneficial Effect and Potential Risk ofPlants (Basel, Switzerland) · 2022Review
- Synergistic interaction between the type III secretion system of the endophytic bacterium Pantoea agglomerans DAPP-PG 734 and the virulence of the causal agent of olive knot Pseudomonas savastanoi pv. savastanoi DAPP-PG 722.Molecular plant pathology · 2021Article
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11 authors at 5 institutions in 4 countries.
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Abstract
The endophytic bacterium Pantoea agglomerans DAPP-PG 734 was previously isolated from olive knots caused by infection with Pseudomonas savastanoi pv. savastanoi DAPP-PG 722. Whole-genome analysis of this P. agglomerans strain revealed the presence of a Hypersensitive response and pathogenicity (Hrp) type III secretion system (T3SS). To assess the role of the P. agglomerans T3SS in the interaction with P. savastanoi pv. savastanoi, we generated independent knockout mutants in three Hrp genes of the P. agglomerans DAPP-PG 734 T3SS (hrpJ, hrpN, and hrpY). In contrast to the wildtype control, all three mutants failed to cause a hypersensitive response when infiltrated in tobacco leaves, suggesting that P. agglomerans T3SS is functional and injects effector proteins in plant cells. In contrast to P. savastanoi pv. savastanoi DAPP-PG 722, the wildtype strain P. agglomerans DAPP-PG 734 and its Hrp T3SS mutants did not cause olive knot disease in 1-year-old olive plants. Coinoculation of P. savastanoi pv. savastanoi with P. agglomerans wildtype strains did not significantly change the knot size, while the DAPP-PG 734 hrpY mutant induced a significant decrease in knot size, which could be complemented by providing hrpY on a plasmid. By epifluorescence microscopy and confocal laser scanning microscopy, we found that the localization patterns in knots were nonoverlapping for P. savastanoi pv. savastanoi and P. agglomerans when coinoculated. Our results suggest that suppression of olive plant defences mediated by the Hrp T3SS of P. agglomerans DAPP-PG 734 positively impacts the virulence of P. savastanoi pv. savastanoi DAPP-PG 722.
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