Shedding light on the role of photosynthesis in pathogen colonization and host defense
Type
ArticleAuthors
Garavaglia, Betiana S.Thomas, Ludivine
Gottig, Natalia
Zimaro, Tamara
Garofalo, Cecilia G.
Gehring, Christoph A

Ottado, Jorgelina
KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionBioscience Program
Computational Bioscience Research Center (CBRC)
Date
2014-10-31Online Publication Date
2014-10-31Print Publication Date
2010-07Permanent link to this record
http://hdl.handle.net/10754/622832
Metadata
Show full item recordAbstract
The role of photosynthesis in plant defense is a fundamental question awaiting further molecular and physiological elucidation. To this end we investigated host responses to infection with the bacterial pathogen Xanthomonas axonopodis pv. citri, the pathogen responsible for citrus canker. This pathogen encodes a plant-like natriuretic peptide (XacPNP) that is expressed specifically during the infection process and prevents deterioration of the physiological condition of the infected tissue. Proteomic assays of citrus leaves infected with a XacPNP deletion mutant (DeltaXacPNP) resulted in a major reduction in photosynthetic proteins such as Rubisco, Rubisco activase and ATP synthase as a compared with infection with wild type bacteria. In contrast, infiltration of citrus leaves with recombinant XacPNP caused an increase in these host proteins and a concomitant increase in photosynthetic efficiency as measured by chlorophyll fluorescence assays. Reversion of the reduction in photosynthetic efficiency in citrus leaves infected with DeltaXacPNP was achieved by the application of XacPNP or Citrus sinensis PNP lending support to a case of molecular mimicry. Finally, given that DeltaXacPNP infection is less successful than infection with the wild type, it appears that reducing photosynthesis is an effective plant defense mechanism against biotrophic pathogens.Citation
Garavaglia BS, Thomas L, Gottig N, Zimaro T, Garofalo CG, et al. (2010) Shedding light on the role of photosynthesis in pathogen colonization and host defense. Communicative & Integrative Biology 3: 382–384. Available: http://dx.doi.org/10.4161/cib.3.4.12029.Publisher
Informa UK LimitedPubMed ID
20798833Additional Links
http://www.tandfonline.com/action/showCopyRight?scroll=top&doi=10.4161%2Fcib.3.4.12029ae974a485f413a2113503eed53cd6c53
10.4161/cib.3.4.12029
Scopus Count
Related articles
- 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
- A eukaryotic-acquired gene by a biotrophic phytopathogen allows prolonged survival on the host by counteracting the shut-down of plant photosynthesis.
- Authors: Garavaglia BS, Thomas L, Gottig N, Dunger G, Garofalo CG, Daurelio LD, Ndimba B, Orellano EG, Gehring C, Ottado J
- Issue date: 2010 Jan 28
- Modulating host homeostasis as a strategy in the plant-pathogen arms race.
- Authors: Gottig N, Garavaglia BS, Daurelio LD, Valentine A, Gehring C, Orellano EG, Ottado J
- Issue date: 2009
- 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
- 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