Information de reference pour ce titreAccession Number: | 00005797-200610010-00004.
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Author: | Vinatzer, Boris A. 1; Teitzel, Gail M. 2; Lee, Min-Woo 2; Jelenska, Joanna 2; Hotton, Sara 2; Fairfax, Keke 2; Jenrette, Jenny 1; Greenberg, Jean T. 2,*
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Institution: | (1)Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, Fralin Biotechnology Center, West Campus Drive, Blacksburg, VA 24061-0346, USA. (2)Department of Molecular Genetics and Cell Biology, The University of Chicago, 1103 East 57th Street, EBC410, Chicago, IL 60637, USA.
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Title: | |
Source: | Molecular Microbiology. 62(1):26-44, October 2006.
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Abstract: | Summary: The bacterial plant pathogen Pseudomonas syringae injects a large repertoire of effector proteins into plant cells using a type III secretion apparatus. Effectors can trigger or suppress defences in a host-dependent fashion. Host defences are often accompanied by programmed cell death, while interference with defences is sometimes associated with cell death suppression. We previously predicted the effector repertoire of the sequenced bean pathogen P. syringae pv. syringae (Psy) B728a using bioinformatics. Here we show that Psy B728a is also pathogenic on the model plant species Nicotiana benthamiana (tobacco). We confirm our effector predictions and clone the nearly complete Psy B728a effector repertoire. We find effectors to have different cell death-modulating activities and distinct roles during the infection of the susceptible bean and tobacco hosts. Unexpectedly, we do not find a strict correlation between cell death-eliciting and defence-eliciting activity and between cell death-suppressing activity and defence-interfering activity. Furthermore, we find several effectors with quantitative avirulence activities on their susceptible hosts, but with growth-promoting effects on Arabidopsis thaliana, a species on which Psy B728a does not cause disease. We conclude that P. syringae strains may have evolved large effector repertoires to extend their host ranges or increase their survival on various unrelated plant species.
Copyright (C) 2006 Blackwell Publishing Ltd.
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Language: | English.
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Document Type: | Research Article.
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Journal Subset: | Life Sciences.
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ISSN: | 0950-382X
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NLM Journal Code: | mom, 8712028
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