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RNA-seq of Medicago truncatula A17 and the ethylene insensitive sickle mutant interacting with the fungal root pathogen, Rhizoctonia solani AG8.

ABSTRACT: RNA-seq of Medicago truncatula A17 and the ethylene insensitive sickle mutant interacting with the fungal root pathogen, Rhizoctonia solani AG8.

PROVIDER: PRJEB19425 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR1830520_1.fastq.gz	Fastqsanger.gz
	ERR1830520_2.fastq.gz	Fastqsanger.gz
	ERR1830530_1.fastq.gz	Fastqsanger.gz
	ERR1830530_2.fastq.gz	Fastqsanger.gz
	ERR1830521_1.fastq.gz	Fastqsanger.gz

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RNA-seq of Medicago truncatula A17 and the ethylene insensitive sickle mutant interacting with the fungal root pathogen, Rhizoctonia solani AG8

Project description:This study compares the response of wild type (A17) and ethylene insensitive mutant (sickle) lines of the model legume Medicago truncatula to infection by the root-infecting necrotrophic fungal pathogen, Rhizoctonia solani AG8 (WAC10335). Two time points were taken, 2 and 7 days after inoculation along with corresponding mock-treated controls.

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Ethylene signaling is important for isoflavonoid mediated resistance to Rhizoctonia solani in roots of Medicago truncatula

Project description:The root-infecting necrotrophic fungal pathogen Rhizoctonia solani causes significant disease to all the world’s major food crops. As a model for pathogenesis of legumes we have examined the interaction of R. solani AG8 with Medicago truncatula. RNAseq analysis of the moderately resistant M. truncatula accession A17 and highly susceptible sickle (skl) mutant (defective in ethylene sensing) identified major transcriptional reprogramming early in A17. Responses specific to A17 included components of ethylene signalling, numerous class IX ERF transcription factor family members, reactive oxygen species metabolism and consistent up-regulation of the isoflavonoid biosynthesis pathway. Mass-spectrometry revealed accumulation of the isoflavonoid related compounds liquiritigenin, formononetin, medicarpin and biochanin A in A17. Over-expression of an isoflavone synthase (IFS) in M. truncatula roots increased isoflavonoid accumulation and resistance to R. solani. Addition of exogenous medicarpin suggested this phytoalexin may be one of several isoflavonoids required to contribute to resistance to R. solani. Together these results provide evidence for the role of ethylene-mediated accumulation of isoflavonoids during defence against root pathogens in legumes.

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Expression data in whole Arabidopsis seedlings after treatment with Rhizoctonia solani AG8 and AG2-1

Project description:Rhizoctonia solani is an economically important soil-borne necrotrophic fungal pathogen, with a broad host range and for which little effective resistance exists in crop plants. Arabidopsis is resistant to the R. solani AG8 isolate but susceptible to R. solani AG2-1. Affymetrix microarray analysis was performed to determine genes that are affected in common and specifically by AG8 and AG2-1.

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Project description:RNA-seq of Medicago truncatula A17 and the ethylene insensitive sickle mutant interacting with the fungal root pathogen, Rhizoctonia solani AG8

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Rhizoctonia solani AG8 infection of wheat seedling roots

Project description:Rhizoctonia solani is a nectrotrophic fungal pathogen that causes billions of dollars of damage to agriculture worldwide and infects a broad host range including wheat, rice, potato and legumes. In this study we identify wheat genes that are differentially expressed in response to the R. solani isolate, AG8-1, using microarray technology. A significant number of wheat genes identified in this screen were involved in ROS production and redox regulation. Levels of ROS species were increased in wheat root tissue following R. solani infection as determined by NBT, DAB and titanium sulphate measurements/stainings. Pathogen/ROS related genes from R. solani were also tested for expression patterns upon wheat infection. TmpL, a R. solani gene homologous to a gene associated with ROS regulation in Alternaria brassicicola, and OAH, a R. solani gene homologous to oxaloacetate acetylhydrolase which has been shown to produce oxalic acid in Sclerotinia sclerotiorum, were highly induced in R.solani when infecting wheat. We speculate that the wheat germin-like protein (GLP) is induced to inactivate the oxalic acid that is produced by the R. solani OAH.

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