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- W2994646891 abstract "Legumes contribute a substantial component of human nutrition; however, their production is often impacted by high levels of losses to diseases and pests. The development of resources for the model legume Medicago truncatula has enabled the molecular and genetic dissection of resistance to numerous pathogens and pests causing losses to legume crops. This chapter outlines some of the advances in our understanding of resistance to Rhizoctonia solani, a root infecting necrotrophic fungal pathogen. Large germplasm screening studies identified and mapped sources of quantitative resistance and mutant screens identified the ethylene signaling pathway as critical for moderate resistance. The moderate resistance was associated with activation of a specific sub-group of the ethylene response transcription factor (ERF) family and accumulation of isoflavonoids, both of which were absent from the ethylene insensitive sickle mutant. Over-activation of some ERFs conferred enhanced resistance to root pathogens without negatively impacting symbiotic interactions. The involvement of similar defense-related pathways in both pathogen defense and regulation of symbiosis suggest a tight regulation of these pathways is required in legumes and highlights the need for research to be conducted in legumes rather than non-legume model plants which lack these interactions. Analysis of the pathogen side of the interaction revealed genomic adaptation and specific recruitment of pathogenicity mechanisms in a broad host range pathogen infecting M. truncatula. Together, these results suggest an understanding of pathosystems involving legume hosts is required in order to enhance resistance or avoid pathogenicity mechanisms when breeding resistant legume crops. The resources available and continuing to be developed for M. truncatula facilitate the efficient delivery of this research." @default.
- W2994646891 created "2019-12-26" @default.
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- W2994646891 date "2019-12-13" @default.
- W2994646891 modified "2023-10-07" @default.
- W2994646891 title "Medicago truncatula as a model host for genetic and molecular dissection of resistance to Rhizoctonia solani" @default.
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- W2994646891 doi "https://doi.org/10.1002/9781119409144.ch40" @default.
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