Interactions of Arabidopsis and M. truncatula with the same pathogens differ in dependence on ethylene and ethylene response factors
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Microbial pathogens inflict large losses to agriculture annually and thus mechanisms of plant resistance and how to deploy them to enhance disease resistance in crops are the foci of much research interest. We recently described the important role of ethylene and Ethylene Response transcription Factors (ERFs), particularly MtERF1-1, in mediating resistance to the fungal pathogen Rhizoctonia solani in the model legume, Medicago truncatula. Previous studies on the closely related AtERF14, a master regulator of ethylene dependent defenses including other ERFs, suggested that in Arabidopsis these defenses were not essential for resistance to the same R. solani isolate but were required for resistance to another fungal pathogen, Fusarium oxysporum. Medicago plants with roots overexpressing MtERF1-1 were challenged with F. oxysporum but showed no altered resistance. These results further support a potential for divergent roles of ethylene associated defenses in different plant hosts responding to the same pathogen.
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The B-3 Ethylene Response Factor MtERF1-1 Mediates Resistance to a Subset of Root Pathogens in Medicago truncatula without Adversely Affecting Symbiosis with RhizobiaAnderson, J.; Lichtenzveig, Judith; Gleason, C.; Oliver, Richard; Singh, K (2010)The fungal necrotrophic pathogen Rhizoctonia solani is a significant constraint to a range of crops as diverse as cereals, canola, and legumes. Despite wide-ranging germplasm screens in many of these crops, no strong ...
Ethylene signaling is important for isoflavonoid-mediated resistance to rhizoctonia solani in roots of medicago truncatulaLiu, Y.; Hassan, S.; Kidd, B.; Garg, G.; Mathesius, U.; Singh, Karam; Anderson, J. (2017)© 2017 The American Phytopathological Society The root-infecting necrotrophic fungal pathogen Rhizocto-niasolani causes significant disease to all the world’s major food crops. As a model for pathogenesis of legumes, we ...
Transcriptome analysis reveals class IX ethylene response factors show specific up-regulation in resistant but not susceptible Medicago truncatula lines following infection with Rhizoctonia solaniAnderson, J.; Kidd, B.; Garg, G.; Singh, Karam (2018)The fungal pathogen Rhizoctonia solani AG8 causes substantial losses to cereal and legume production in Australia and the Pacific Northwest of the United States of America. Mutant analyses have revealed a critical role ...