A eukaryotic-acquired gene by a biotrophic phytopathogen allows prolonged survival on the host by counteracting the shut-down of plant photosynthesis
AuthorsGaravaglia, Betiana S.
Garofalo, Cecilia G.
Daurelio, Lucas D.
Orellano, Elena G.
Gehring, Christoph A
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Computational Bioscience Research Center (CBRC)
Permanent link to this recordhttp://hdl.handle.net/10754/325283
MetadataShow full item record
AbstractXanthomonas citri pv. citri, the bacteria responsible for citrus canker posses a biological active plant natriuretic peptide (PNP)-like protein, not present in any other bacteria. PNPs are a class of extracellular, systemically mobile peptides that elicit a number of plant responses important in homeostasis and growth. Previously, we showed that a Xanthomonas citri pv. citri mutant lacking the PNP-like protein XacPNP produced more necrotic lesions in citrus leaves than wild type infections and suggested a role for XacPNP in the regulation of host homeostasis. Here we have analyzed the proteome modifications observed in citrus leaves infected with the wild type and XacPNP deletion mutant bacteria. While both of them cause downregulation of enzymes related to photosynthesis as well as chloroplastic ribosomal proteins, proteins related to defense responses are up-regulated. However, leaves infiltrated with the XacPNP deletion mutant show a more pronounced decrease in photosynthetic proteins while no reduction in defense related proteins as compared to the wild-type pathogen. This suggests that XacPNP serves the pathogen to maintain host photosynthetic efficiency during pathogenesis. The results from the proteomics analyses are consistent with our chlorophyll fluorescence data and transcript analyses of defense genes that show a more marked reduction in photosynthesis in the mutant but no difference in the induction of genes diagnostic for biotic-stress responses. We therefore conclude that XacPNP counteracts the shut-down of host photosynthesis during infection and in that way maintains the tissue in better conditions, suggesting that the pathogen has adapted a host gene to modify its natural host and render it a better reservoir for prolonged bacterial survival and thus for further colonization. 2010 Garavaglia et al.
CitationGaravaglia BS, Thomas L, Gottig N, Dunger G, Garofalo CG, et al. (2010) A Eukaryotic-Acquired Gene by a Biotrophic Phytopathogen Allows Prolonged Survival on the Host by Counteracting the Shut-Down of Plant Photosynthesis. PLoS ONE 5: e8950. doi:10.1371/journal.pone.0008950.
PublisherPublic Library of Science (PLoS)
PubMed Central IDPMC2812515
- A plant natriuretic peptide-like molecule of the pathogen Xanthomonas axonopodis pv. citri causes rapid changes in the proteome of its citrus host.
- Authors: Garavaglia BS, Thomas L, Zimaro T, Gottig N, Daurelio LD, Ndimba B, Orellano EG, Ottado J, Gehring C
- Issue date: 2010 Mar 21
- Xanthomonas axonopodis pv. citri uses a plant natriuretic peptide-like protein to modify host homeostasis.
- Authors: Gottig N, Garavaglia BS, Daurelio LD, Valentine A, Gehring C, Orellano EG, Ottado J
- Issue date: 2008 Nov 25
- Shedding light on the role of photosynthesis in pathogen colonization and host defense.
- Authors: Garavaglia BS, Thomas L, Gottig N, Zimaro T, Garofalo CG, Gehring C, Ottado J
- Issue date: 2010 Jul
- Bacterial and plant natriuretic peptides improve plant defence responses against pathogens.
- Authors: Ficarra FA, Grandellis C, Garavaglia BS, Gottig N, Ottado J
- Issue date: 2018 Apr
- Extracellular matrix-associated proteome changes during non-host resistance in citrus-Xanthomonas interactions.
- Authors: Swaroopa Rani T, Podile AR
- Issue date: 2014 Apr
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