ArticleApplied and environmental microbiology2011
Commensal effect of pectate lyases secreted from Dickeya dadantii on proliferation of Escherichia coli O157:H7 EDL933 on lettuce leaves.
Article in Applied and environmental microbiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed, 29 citations in OpenAlex.
- Relay Architectures and Ecological Strategies of Quorum Sensing Effects on Microbial Interactions.Environmental microbiology · 2026Review
- RpoS-Regulated Genes and Phenotypes in the Phytopathogenic BacteriumInternational journal of molecular sciences · 2023Article
- Effect of a Stannous Fluoride Dentifrice on Biofilm Composition, Gene Expression and Biomechanical Properties.Microorganisms · 2022Article
- In planta transcriptomics reveals conflicts between pattern-triggered immunity and the AlgU sigma factor regulon.PloS one · 2022Article
- Influence of seasonal changes and salinity on spinach phyllosphere bacterial functional assemblage.PloS one · 2021Article
- Exploring the microbiota and metabolites of traditional rice beer varieties of Assam and their functionalities.3 Biotech · 2019Article
- Interactions of Salmonella enterica Serovar Typhimurium and Pectobacterium carotovorum within a Tomato Soft Rot.Applied and environmental microbiology · 2018Article
- Expanding Role of Type II Secretion in Bacterial Pathogenesis and Beyond.Infection and immunity · 2017Review
- Evolutionary study of Yersinia genomes deciphers emergence of human pathogenic species.Scientific reports · 2016Article
- Xanthomonas perforans colonization influences Salmonella enterica in the tomato phyllosphere.Applied and environmental microbiology · 2014Article
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- The salmonella transcriptome in lettuce and cilantro soft rot reveals a niche overlap with the animal host intestine.Applied and environmental microbiology · 2013Article
- Top 10 plant pathogenic bacteria in molecular plant pathology.Molecular plant pathology · 2012Review
- Transcriptional responses of Escherichia coli K-12 and O157:H7 associated with lettuce leaves.Applied and environmental microbiology · 2012Article
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The outbreaks caused by enterohemorrhagic Escherichia coli O157:H7 on leafy greens have raised serious and immediate food safety concerns. It has been suggested that several phytopathogens aid in the persistence and proliferation of the human enteropathogens in the phyllosphere. In this work, we examined the influence of virulence mechanisms of Dickeya dadantii 3937, a broad-host-range phytopathogen, on the proliferation of the human pathogen E. coli O157:H7 EDL933 (EDL933) on postharvest lettuce by coinoculation of EDL933 with D. dadantii 3937 derivatives that have mutations in virulence-related genes. A type II secretion system (T2SS)-deficient mutant of D. dadantii 3937, A1919 (ΔoutC), lost the capability to promote the multiplication of EDL933, whereas Ech159 (ΔrpoS), a stress-responsive σ factor RpoS-deficient mutant, increased EDL933 proliferation on lettuce leaves. A spectrophotometric enzyme activity assay revealed that A1919 (ΔoutC) was completely deficient in the secretion of pectate lyases (Pels), which play a major role in plant tissue maceration. In contrast to A1919 (ΔoutC), Ech159 (ΔrpoS) showed more than 2-fold-greater Pel activity than the wild-type D. dadantii 3937. Increased expression of pelD (encodes an endo-pectate lyase) was observed in Ech159 (ΔrpoS) in planta. These results suggest that the pectinolytic activity of D. dadantii 3937 is the dominant determinant of enhanced EDL933 proliferation on the lettuce leaves. In addition, RpoS, the general stress response σ factor involved in cell survival in suboptimal conditions, plays a role in EDL933 proliferation by controlling the production of pectate lyases in D. dadantii 3937.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.