Dataset Information

Identification and characterisation of hypomethylated DNA loci controlling quantitative resistance in Arabidopsis.

ABSTRACT: Variation in DNA methylation enables plants to inherit traits independently of changes to DNA sequence. Here, we have screened an Arabidopsis population of epigenetic recombinant inbred lines (epiRILs) for resistance against Hyaloperonospora arabidopsidis (Hpa). These lines share the same genetic background, but show variation in heritable patterns of DNA methylation. We identified four epigenetic quantitative trait loci (epiQTLs) that provide quantitative resistance without reducing plant growth or resistance to other (a)biotic stresses. Phenotypic characterisation and RNA-sequencing analysis revealed that Hpa-resistant epiRILs are primed to activate defence responses at the relatively early stages of infection. Collectively, our results show that hypomethylation at selected pericentromeric regions is sufficient to provide quantitative disease resistance, which is associated with genome-wide priming of defence-related genes. Based on comparisons of global gene expression and DNA methylation between the wild-type and resistant epiRILs, we discuss mechanisms by which the pericentromeric epiQTLs could regulate the defence-related transcriptome.

SUBMITTER: Furci L

PROVIDER: S-EPMC6342528 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

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Identification and characterisation of hypomethylated DNA loci controlling quantitative resistance in Arabidopsis.

Furci Leonardo L Jain Ritushree R Stassen Joost J Berkowitz Oliver O Whelan James J Roquis David D Baillet Victoire V Colot Vincent V Johannes Frank F Ton Jurriaan J

eLife 20190104

Variation in DNA methylation enables plants to inherit traits independently of changes to DNA sequence. Here, we have screened an Arabidopsis population of epigenetic recombinant inbred lines (epiRILs) for resistance against Hyaloperonospora arabidopsidis (Hpa). These lines share the same genetic background, but show variation in heritable patterns of DNA methylation. We identified four epigenetic quantitative trait loci (epiQTLs) that provide quantitative resistance without reduci ...[more]

PMID: 30608232

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Dataset Information

Identification and characterisation of hypomethylated DNA loci controlling quantitative resistance in Arabidopsis.

Publications

Identification and characterisation of hypomethylated DNA loci controlling quantitative resistance in <i>Arabidopsis</i>.

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