Interactions of Arabidopsis andM. truncatulawith the same pathogens differ in dependence on ethylene and ethylene response factors

We recently described the important role of ethylene and Ethylene Response transcription Factors, MtERF1-1, in mediating resistance to the fungal pathogen Rhizoctonia solani in the model legume, Medicago truncatula

Jonathan P. Anderson; Karam B. Singh

2011

Scholarcy highlights

  • Commonwealth Scientific and Industrial Research Organisation; Division of Plant Industry; Floreat, WA Australia; The UWA Institute of Agriculture; The University of Western Australia; Crawley, WA Australia
  • We recently described the important role of ethylene and Ethylene Response transcription Factors, MtERF1-1, in mediating resistance to the fungal pathogen Rhizoctonia solani in the model legume, Medicago truncatula
  • Medicago plants with roots overexpressing MtERF1-1 were challenged with F. oxysporum but showed no altered resistance
  • In recent studies using the model legume Medicago truncatula we have found that the ethylene pathway and Ethylene Response transcription Factors of the B-3 subgroup are important for mediating resistance to the soil borne fungal pathogen, Rhizoctonia solani
  • These results suggested the defenses regulated by the B-3 ERFs may play an important role in mediating resistance to this broad host range pathogen
  • Studies in Arabidopsis identified a closely related member of the B-3 subgroup of ERFs as a master regulator of ethylene mediated defense response including regulating the expression of genes encoding other B-3 ERF transcription factors
  • These findings suggest that for studies with the goal of enhancing pathogen resistance in crop plants based on results from model species, characterization of the host response in the crop plants themselves may be routinely required to validate conclusions made in model plants

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