Transcriptional responses of Pseudomonas syringae to growth in epiphytic versus apoplastic leaf sites

Significance Plant leaves are heavily colonized by microorganisms, but the extent to which the surface sites differ from interior sites in selecting for microbial colonization traits is poorly understood. Global gene-expression studies of the foliar pathogen Pseudomonas syringae reveal that leaf sur...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2013-01, Vol.110 (5), p.E425-E434
Main Authors: Yu, Xilan, Lund, Steven P, Scott, Russell A, Greenwald, Jessica W, Records, Angela H, Nettleton, Dan, Lindow, Steven E, Gross, Dennis C, Beattie, Gwyn A
Format: Article
Language:English
Subjects:
Bacterial Proteins - classification
Bacterial Proteins - genetics
Bacterial Proteins - metabolism
Biological Sciences
Cell Wall - metabolism
Cell Wall - microbiology
Chemosensory perception
Cluster Analysis
Ecosystem
Extracellular Space - metabolism
Extracellular Space - microbiology
Flagella - metabolism
Flagella - physiology
Gene expression
Gene Expression Profiling
Gene Expression Regulation, Bacterial
Genes, Bacterial - genetics
Gram-negative bacteria
Habitats
Host-Pathogen Interactions
Leaves
Motility
Movement
Nitrogen - metabolism
Oligonucleotide Array Sequence Analysis
Oxidative stress
Peptides, Cyclic - metabolism
Phenylalanine - metabolism
Plant Epidermis - metabolism
Plant Epidermis - microbiology
Plant Leaves - metabolism
Plant Leaves - microbiology
PNAS Plus
Pseudomonas syringae - genetics
Pseudomonas syringae - pathogenicity
Pseudomonas syringae - physiology
Virulence - genetics
Water - metabolism
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Summary:Significance Plant leaves are heavily colonized by microorganisms, but the extent to which the surface sites differ from interior sites in selecting for microbial colonization traits is poorly understood. Global gene-expression studies of the foliar pathogen Pseudomonas syringae reveal that leaf surface sites specifically favor active exploration using flagellar motility, chemosensing, and chemotaxis. In contrast, interior sites favor production of enzymes and secondary compounds that modulate bacterial interactions with the plant and its defense system. Water limitation is a dominating force in both surface and interior sites. These findings provide a rich understanding of the leaf habitats encountered by bacteria.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.1221892110