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Complex relationship between DNA methylation and gene expression due to Lr28 in wheat-leaf rust pathosystem
- Source :
- Molecular biology reports. 47(2)
- Publication Year :
- 2019
-
Abstract
- Differential DNA methylation due to Lr28 was examined in susceptible (S) wheat cv. HD2329 and its resistant (R) near isogenic line (NIL) (HD2329+Lr28) using two approaches: methylation sensitive amplified polymorphism (MSAP) and methylated DNA immunoprecipitation (MeDIP). S/R lines each had a large number of hypomethylated genes and relatively fewer hypermethylated genes at 96 hai (hours after inoculation) relative to 0 hbi (hours before inoculation), suggesting activation of many genes during the passage of time (96 hai), although identity of genes may differ in S and R lines. When R NIL was compared with S cultivar, there were many hypermethylated and fewer hypomethylated genes in R NIL relative to S cultivar, suggesting that many genes that are active in S cultivar are silenced in R NIL, both at 0 hbi and at 96 hai. Level of methylation was generally abundant in intergenic regions followed by that in promoters, transcription termination sites (TTSs) and exons/introns. Hypermethylation in promoter and gene body regions was not always associated with inhibition of gene expression and vice-versa, indicating that more than one regulatory mechanisms may control the expression of genes due to pathogen attack in presence and absence of Lr28. MSAP analysis also showed abundance of mCG methylation in S cultivar and that of mCCG methylation in R NIL (at 96 hai), suggesting differences in methylation context in NILs with and without Lr28. The results of the present study improved our understanding of the epigenetic control of leaf rust resistance in wheat.
- Subjects :
- 0301 basic medicine
Biology
Genes, Plant
03 medical and health sciences
Wheat leaf rust
Open Reading Frames
0302 clinical medicine
Gene Expression Regulation, Plant
parasitic diseases
Genetics
Methylated DNA immunoprecipitation
Epigenetics
Molecular Biology
Gene
Triticum
Plant Diseases
Polymorphism, Genetic
Basidiomycota
fungi
food and beverages
Promoter
Molecular Sequence Annotation
General Medicine
Methylation
DNA Methylation
biology.organism_classification
Plant Leaves
030104 developmental biology
Gene Ontology
030220 oncology & carcinogenesis
DNA methylation
DNA Transposable Elements
Body region
Subjects
Details
- ISSN :
- 15734978
- Volume :
- 47
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Molecular biology reports
- Accession number :
- edsair.doi.dedup.....5d72fce179a9eb8eb7627e9338c0f1e9