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Title: OsWRKY22 , a monocot WRKY gene , plays a role in the resistance response to blast
Author: Abbruscato P Nepusz T Mizzi L Del Corvo M Morandini P Fumasoni I Michel C Paccanaro A Guiderdoni E Schaffrath U Morel JB Piffanelli P Faivre-Rampant O
Journal: Mol Plant Pathol Citation: V : P : Year: 2012 Type: Publisher
Literature: oryza Field: abstract Doc ID: pub22443363 Accession (PMID): 22443363
Abstract: With the aim of identifying novel regulators of host and nonhost resistance to fungi in rice , we carried out a systematic mutant screen of mutagenized lines . Two mutant wrky22 knockout lines revealed clear-cut enhanced susceptibility to both virulent and avirulent Magnaporthe oryzae strains and altered cellular responses to nonhost Magnaporthe grisea and Blumeria graminis fungi . In addition , the analysis of the pathogen responses of 24 overexpressor OsWRKY22 lines revealed enhanced resistance phenotypes on infection with virulent M oryzae strain , confirming that OsWRKY22 is involved in rice resistance to blast Bioinformatic analyses determined that the OsWRKY22 gene belongs to a well-defined cluster of monocot-specific WRKYs . The co-regulatory analysis revealed no significant co-regulation of OsWRKY22 with a representative panel of OsWRKYs , supporting its unique role in a series of transcriptional responses . In contrast , inquiring a subset of biotic stress-related Affymetrix data , a large number of resistance and defence-related genes were found to be putatively co-expressed with OsWRKY22 . Taken together , all gathered experimental evidence places the monocot-specific OsWRKY22 gene at the convergence point of signal transduction circuits in response to both host and nonhost fungi encountering rice plants .
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[ Sen. 2, subscore: 1.00 ]: Two mutant wrky22 knockout lines revealed clear-cut enhanced susceptibility to both virulent and avirulent Magnaporthe oryzae strains and altered cellular responses to nonhost Magnaporthe grisea and Blumeria graminis fungi .
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