Publication Date:
2006-12-23
Description:
Plant immune responses are triggered by pattern recognition receptors that detect conserved pathogen-associated molecular patterns (PAMPs) or by resistance (R) proteins recognizing isolate-specific pathogen effectors. We show that in barley, intracellular mildew A (MLA) R proteins function in the nucleus to confer resistance against the powdery mildew fungus. Recognition of the fungal avirulence A10 effector by MLA10 induces nuclear associations between receptor and WRKY transcription factors. The identified WRKY proteins act as repressors of PAMP-triggered basal defense. MLA appears to interfere with the WRKY repressor function, thereby de-repressing PAMP-triggered basal defense. Our findings reveal a mechanism by which these polymorphic immune receptors integrate distinct pathogen signals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shen, Qian-Hua -- Saijo, Yusuke -- Mauch, Stefan -- Biskup, Christoph -- Bieri, Stephane -- Keller, Beat -- Seki, Hikaru -- Ulker, Bekir -- Somssich, Imre E -- Schulze-Lefert, Paul -- New York, N.Y. -- Science. 2007 Feb 23;315(5815):1098-103. Epub 2006 Dec 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Microbe Interactions, Max-Planck-Institut fur Zuchtungsforschung, Carl-von-Linne-Weg 10, D-50829 Koln, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17185563" target="_blank"〉PubMed〈/a〉
Keywords:
Amino Acid Sequence
;
Arabidopsis/genetics/*immunology/metabolism/microbiology
;
Arabidopsis Proteins/genetics/metabolism
;
Ascomycota/growth & development/*immunology
;
Cell Nucleus/metabolism
;
Cytoplasm/metabolism
;
Fungal Proteins/metabolism
;
Hordeum/genetics/*immunology/metabolism/microbiology
;
Immunity, Innate
;
Molecular Sequence Data
;
Mutation
;
Plant Diseases/*immunology/microbiology
;
Plant Proteins/chemistry/genetics/*metabolism
;
Plants, Genetically Modified
;
Protein Structure, Tertiary
;
Receptors, Immunologic/chemistry/genetics/*metabolism
;
Receptors, Pattern Recognition/metabolism
;
Recombinant Fusion Proteins/metabolism
;
Transcription Factors/genetics/*metabolism
;
Two-Hybrid System Techniques
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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