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The Arabidopsis thaliana JASMONATE INSENSITIVE 1 gene is required for suppression of salicylic acid-dependent defenses during infection by Pseudomonas syringae.
Mol Plant Microbe Interact. 2006 Jul; 19(7):789-800.MP

Abstract

Many plant pathogens suppress antimicrobial defenses using virulence factors that modulate endogenous host defenses. The Pseudomonas syringae phytotoxin coronatine (COR) is believed to promote virulence by acting as a jasmonate analog, because COR-insensitive 1 (coil) Arabidopsis thaliana and tomato mutants are impaired in jasmonate signaling and exhibit reduced susceptibility to P. syringae. To further investigate the role of jasmonate signaling in disease development, we analyzed several jasmonate-insensitive A. thaliana mutants for susceptibility to P. syringae pv. tomato strain DC3000 and sensitivity to COR. Jasmonate-insensitive 1 (jin1) mutants exhibit both reduced susceptibility to P. syringae pv. tomato DC3000 and reduced sensitivity to COR, whereas jasmonate-resistant 1 (jar1) plants exhibit wild-type responses to both COR and P. syringae pv. tomato DC3000. A jin1 jar1 double mutant does not exhibit enhanced jasmonate insensitivity, suggesting that JIN1 functions downstream of jasmonic acid-amino acid conjugates synthesized by JAR1. Reduced disease susceptibility in jin1 mutants is correlated with elevated expression of pathogenesis-related 1 (PR-1) and is dependent on accumulation of salicylic acid (SA). We also show that JIN1 is required for normal P. syringae pv. tomato DC3000 symptom development through an SA-independent mechanism. Thus, P. syringae pv. tomato DC3000 appears to utilize COR to manipulate JIN1-dependent jasmonate signaling both to suppress SA-mediated defenses and to promote symptom development.

Authors+Show Affiliations

Department of Biology, Washington University, St Louis, MO 63130, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

16838791

Citation

Laurie-Berry, Neva, et al. "The Arabidopsis Thaliana JASMONATE INSENSITIVE 1 Gene Is Required for Suppression of Salicylic Acid-dependent Defenses During Infection By Pseudomonas Syringae." Molecular Plant-microbe Interactions : MPMI, vol. 19, no. 7, 2006, pp. 789-800.
Laurie-Berry N, Joardar V, Street IH, et al. The Arabidopsis thaliana JASMONATE INSENSITIVE 1 gene is required for suppression of salicylic acid-dependent defenses during infection by Pseudomonas syringae. Mol Plant Microbe Interact. 2006;19(7):789-800.
Laurie-Berry, N., Joardar, V., Street, I. H., & Kunkel, B. N. (2006). The Arabidopsis thaliana JASMONATE INSENSITIVE 1 gene is required for suppression of salicylic acid-dependent defenses during infection by Pseudomonas syringae. Molecular Plant-microbe Interactions : MPMI, 19(7), 789-800.
Laurie-Berry N, et al. The Arabidopsis Thaliana JASMONATE INSENSITIVE 1 Gene Is Required for Suppression of Salicylic Acid-dependent Defenses During Infection By Pseudomonas Syringae. Mol Plant Microbe Interact. 2006;19(7):789-800. PubMed PMID: 16838791.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The Arabidopsis thaliana JASMONATE INSENSITIVE 1 gene is required for suppression of salicylic acid-dependent defenses during infection by Pseudomonas syringae. AU - Laurie-Berry,Neva, AU - Joardar,Vinita, AU - Street,Ian H, AU - Kunkel,Barbara N, PY - 2006/7/15/pubmed PY - 2007/3/7/medline PY - 2006/7/15/entrez SP - 789 EP - 800 JF - Molecular plant-microbe interactions : MPMI JO - Mol. Plant Microbe Interact. VL - 19 IS - 7 N2 - Many plant pathogens suppress antimicrobial defenses using virulence factors that modulate endogenous host defenses. The Pseudomonas syringae phytotoxin coronatine (COR) is believed to promote virulence by acting as a jasmonate analog, because COR-insensitive 1 (coil) Arabidopsis thaliana and tomato mutants are impaired in jasmonate signaling and exhibit reduced susceptibility to P. syringae. To further investigate the role of jasmonate signaling in disease development, we analyzed several jasmonate-insensitive A. thaliana mutants for susceptibility to P. syringae pv. tomato strain DC3000 and sensitivity to COR. Jasmonate-insensitive 1 (jin1) mutants exhibit both reduced susceptibility to P. syringae pv. tomato DC3000 and reduced sensitivity to COR, whereas jasmonate-resistant 1 (jar1) plants exhibit wild-type responses to both COR and P. syringae pv. tomato DC3000. A jin1 jar1 double mutant does not exhibit enhanced jasmonate insensitivity, suggesting that JIN1 functions downstream of jasmonic acid-amino acid conjugates synthesized by JAR1. Reduced disease susceptibility in jin1 mutants is correlated with elevated expression of pathogenesis-related 1 (PR-1) and is dependent on accumulation of salicylic acid (SA). We also show that JIN1 is required for normal P. syringae pv. tomato DC3000 symptom development through an SA-independent mechanism. Thus, P. syringae pv. tomato DC3000 appears to utilize COR to manipulate JIN1-dependent jasmonate signaling both to suppress SA-mediated defenses and to promote symptom development. SN - 0894-0282 UR - https://www.unboundmedicine.com/medline/citation/16838791/The_Arabidopsis_thaliana_JASMONATE_INSENSITIVE_1_gene_is_required_for_suppression_of_salicylic_acid_dependent_defenses_during_infection_by_Pseudomonas_syringae_ L2 - http://apsjournals.apsnet.org/doi/full/10.1094/MPMI-19-0789?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -