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Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open
Journal article
Rice-Infecting Pseudomonas Genomes Are Highly Accessorized and Harbor Multiple Putative Virulence Mechanisms to Cause Sheath Brown Rot
PloS one, Vol.10(9), e0139256
30/09/2015
PMCID: PMC4589537
PMID: 26422147
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Abstract
Sheath rot complex and seed discoloration in rice involve a number of pathogenic bacteria that cannot be associated with distinctive symptoms. These pathogens can easily travel on asymptomatic seeds and therefore represent a threat to rice cropping systems. Among the rice-infecting Pseudomonas, P. fuscovaginae has been associated with sheath brown rot disease in several rice growing areas around the world. The appearance of a similar Pseudomonas population, which here we named P. fuscovaginae-like, represents a perfect opportunity to understand common genomic features that can explain the infection mechanism in rice. We showed that the novel population is indeed closely related to P. fuscovaginae. A comparative genomics approach on eight rice-infecting Pseudomonas revealed heterogeneous genomes and a high number of strain-specific genes. The genomes of P. fuscovaginae-like harbor four secretion systems (Type I, II, III, and VI) and other important pathogenicity machinery that could probably facilitate rice colonization. We identified 123 core secreted proteins, most of which have strong signatures of positive selection suggesting functional adaptation. Transcript accumulation of putative pathogenicity-related genes during rice colonization revealed a concerted virulence mechanism. The study suggests that rice-infecting Pseudomonas causing sheath brown rot are intrinsically diverse and maintain a variable set of metabolic capabilities as a potential strategy to occupy a range of environments.
Details
- Title
- Rice-Infecting Pseudomonas Genomes Are Highly Accessorized and Harbor Multiple Putative Virulence Mechanisms to Cause Sheath Brown Rot
- Creators
- Ian Lorenzo Quibod - Plant Breeding, Genetics, and Biotechnology Division, International Rice Research Institute, Los Baños, PhilippinesGenelou Grande - Plant Breeding, Genetics, and Biotechnology Division, International Rice Research Institute, Los Baños, PhilippinesEula Gems Oreiro - Plant Breeding, Genetics, and Biotechnology Division, International Rice Research Institute, Los Baños, PhilippinesFrances Nikki Borja - International Rice Research Institute (Phillipines)Gerbert Sylvestre DossaRamil Mauleon - International Rice Research InstituteCasiana Vera Cruz - Plant Breeding, Genetics, and Biotechnology Division, International Rice Research Institute, Los Baños, PhilippinesRicardo Oliva - International Rice Research Institute
- Publication Details
- PloS one, Vol.10(9), e0139256
- Publisher
- PLOS One
- Grant note
- Scientists at the International Rice Research Institute are partially funded by the Global Rice Science Partnership (GRiSP). The program is supported by the Consortium for International Agricultural Research (CGIAR) with headquarters in Montpellier, France. More information can be found at http://www.cgiar.org/. No additional funding source is declared.
- Identifiers
- 991012978827502368
- Copyright
- : © 2015 Quibod et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article