Document Detail

Overexpression of CRK13, an Arabidopsis cysteine-rich receptor-like kinase, results in enhanced resistance to Pseudomonas syringae.
MedLine Citation:
PMID:  17419849     Owner:  NLM     Status:  MEDLINE    
Protein kinases play important roles in relaying information from perception of a signal to the effector genes in all organisms. Cysteine-rich receptor-like kinases (CRKs) constitute a sub-family of plant receptor-like kinases (RLKs) with more than 40 members that contain the novel C-X8-C-X2-C motif (DUF26) in the extracellular domains. Here we report molecular characterization of one member of this gene family, CRK13. Expression of this gene is induced more quickly and strongly in response to the avirulent compared with the virulent strains of Pseudomonas syringae, and peaks within 4 h after pathogen infection. In response to dexamethasone (DEX) treatment, plants expressing the CRK13 gene from a DEX-inducible promoter exhibited all tested features of pathogen defense activation, including rapid tissue collapse, accumulation of high levels of several defense-related gene transcripts including PR1, PR5 and ICS1, and accumulation of salicylic acid (SA). In addition, these plants suppressed growth of virulent pathogens by about 20-fold compared with the wild-type Col-0. CRK13-conferred pathogen resistance is salicylic acid-dependent. Gene expression analysis using custom cDNA microarrays revealed a remarkable overlap between the expression profiles of the plants overexpressing CRK13 and the plants treated with Pst DC3000 (avrRpm1). Our studies suggest that upregulation of CRK13 leads to hypersensitive response-associated cell death, and induces defense against pathogens by causing increased accumulation of salicylic acid.
Biswa R Acharya; Surabhi Raina; Shahina B Maqbool; Guru Jagadeeswaran; Stephen L Mosher; Heidi M Appel; Jack C Schultz; Daniel F Klessig; Ramesh Raina
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-04-05
Journal Detail:
Title:  The Plant journal : for cell and molecular biology     Volume:  50     ISSN:  0960-7412     ISO Abbreviation:  Plant J.     Publication Date:  2007 May 
Date Detail:
Created Date:  2007-04-25     Completed Date:  2007-07-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9207397     Medline TA:  Plant J     Country:  England    
Other Details:
Languages:  eng     Pagination:  488-99     Citation Subset:  IM    
Department of Biology, Syracuse University, Syracuse, NY 13244, USA.
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MeSH Terms
Arabidopsis / genetics,  metabolism*,  microbiology*
Cell Death / physiology
Gene Expression Profiling
Gene Expression Regulation, Plant
Genes, Plant
Plant Diseases / microbiology*
Plant Leaves / metabolism
Plants, Genetically Modified
Pseudomonas syringae / metabolism*
Salicylic Acid / metabolism
Reg. No./Substance:
69-72-7/Salicylic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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