« Previous AbstractSignals involved in Arabidopsis resistance to Trichoplusia ni caterpillars induced by virulent and avirulent strains of the phytopathogen Pseudomonas syringae    Next AbstractSurface Modification by Amino Group Inducing for Highly Efficient Catalytic Oxidation of Toluene over a Pd/KIT-6 Catalyst »

Proc Natl Acad Sci U S A

Title:		Pseudomonas syringae manipulates systemic plant defenses against pathogens and herbivores
Author(s):		Cui J; Bahrami AK; Pringle EG; Hernandez-Guzman G; Bender CL; Pierce NE; Ausubel FM;
Address:		"Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, MA 02138, USA"
Journal Title:		Proc Natl Acad Sci U S A
Year:		2005
Volume:		20050118
Issue:		5
Page Number:		1791 - 1796
DOI:		10.1073/pnas.0409450102
ISSN/ISBN:		0027-8424 (Print) 1091-6490 (Electronic) 0027-8424 (Linking)
Abstract:		"Many pathogens are virulent because they specifically interfere with host defense responses and therefore can proliferate. Here, we report that virulent strains of the bacterial phytopathogen Pseudomonas syringae induce systemic susceptibility to secondary P. syringae infection in the host plant Arabidopsis thaliana. This systemic induced susceptibility (SIS) is in direct contrast to the well studied avirulence/R gene-dependent resistance response known as the hypersensitive response that elicits systemic acquired resistance. We show that P. syringae-elicited SIS is caused by the production of coronatine (COR), a pathogen-derived functional and structural mimic of the phytohormone jasmonic acid (JA). These data suggest that SIS may be a consequence of the previously described mutually antagonistic interaction between the salicylic acid and JA signaling pathways. Virulent P. syringae also has the potential to induce net systemic susceptibility to herbivory by an insect (Trichoplusia ni, cabbage looper), but this susceptibility is not caused by COR. Rather, consistent with its role as a JA mimic, COR induces systemic resistance to T. ni. These data highlight the complexity of defense signaling interactions among plants, pathogens, and herbivores"
Keywords:		"Animals Arabidopsis/*microbiology/parasitology Disease Susceptibility Insecta/parasitology Models, Biological Plant Diseases/microbiology/parasitology Pseudomonas syringae/pathogenicity/*physiology Virulence;"
Notes:		"MedlineCui, Jianping Bahrami, Adam K Pringle, Elizabeth G Hernandez-Guzman, Gustavo Bender, Carol L Pierce, Naomi E Ausubel, Frederick M eng R01 GM048707/GM/NIGMS NIH HHS/ R37 GM048707/GM/NIGMS NIH HHS/ GM48707/GM/NIGMS NIH HHS/ Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. 2005/01/20 Proc Natl Acad Sci U S A. 2005 Feb 1; 102(5):1791-6. doi: 10.1073/pnas.0409450102. Epub 2005 Jan 18"