ArticleProceedings of the National Academy of Sciences of the United States of America2013
Transcriptional responses of Pseudomonas syringae to growth in epiphytic versus apoplastic leaf sites.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 101 papers.
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101 citing papers in PubMed, 228 citations in OpenAlex.
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- Flagellin sensing, signaling, and immune responses in plants.Plant communications · 2025Review
- Divergence and convergence in epiphytic and endophytic phyllosphere bacterial communities of rice landraces.mSphere · 2024Article
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- Gene expression changes throughout the life cycle allow a bacterial plant pathogen to persist in diverse environmental habitats.PLoS pathogens · 2023Article
- Light cues induce protective anticipation of environmental water loss in terrestrial bacteria.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Elicitor-induced plant immunity relies on amino acids accumulation to delay the onset of bacterial virulence.Plant physiology · 2023Article
- TaSYP137 and TaVAMP723, the SNAREs Proteins from Wheat, Reduce Resistance toInternational journal of molecular sciences · 2023Article
- Prevention of Stomatal Entry as a Strategy for Plant Disease Control against Foliar PathogenicPlants (Basel, Switzerland) · 2023Review
- Response of microbial communities in the phyllosphere ecosystem of tobacco exposed to the broad-spectrum copper hydroxide.Frontiers in microbiology · 2023Article
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- Optimization and application of non-native Phragmites australis transcriptome assemblies.PloS one · 2023Article
- Chemotactic Responses ofMicroorganisms · 2022Article
41 more citing papers are in PubMed but not listed here.
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Authors and funding
9 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Some strains of the foliar pathogen Pseudomonas syringae are adapted for growth and survival on leaf surfaces and in the leaf interior. Global transcriptome profiling was used to evaluate if these two habitats offer distinct environments for bacteria and thus present distinct driving forces for adaptation. The transcript profiles of Pseudomonas syringae pv. syringae B728a support a model in which leaf surface, or epiphytic, sites specifically favor flagellar motility, swarming motility based on 3-(3-hydroxyalkanoyloxy) alkanoic acid surfactant production, chemosensing, and chemotaxis,indicating active relocation primarily on the leaf surface. Epiphytic sites also promote high transcript levels for phenylalanine degradation, which may help counteract phenylpropanoid-based defenses before leaf entry. In contrast, intercellular, or apoplastic,sites favor the high-level expression of genes for GABA metabolism (degradation of these genes would attenuate GABA repression of virulence) and the synthesis of phytotoxins, two additional secondary metabolites, and syringolin A. These findings support roles for these compounds in virulence, including a role for syringolin A in suppressing defense responses beyond stomatal closure. A comparison of the transcriptomes from in planta cells and from cells exposed to osmotic stress, oxidative stress, and iron and nitrogen limitation indicated that water availability, in particular,was limited in both leaf habitats but was more severely limited in the apoplast than on the leaf surface under the conditions tested. These findings contribute to a coherent model of the adaptations of this widespread bacterial phytopathogen to distinct habitats within its host.
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