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Permanent link (DOI): https://doi.org/10.7939/R3707X255

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Genome wide identification and functional prediction of long non-coding RNAs responsive to Sclerotinia sclerotiorum infection in Brassica napus Open Access

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Author or creator
Joshi, Raj K.
Megha, Swati
Basu, Urmila
Rahman, Muhammad H.
Kav, Nat N. V.
Additional contributors
Subject/Keyword
MicroRNAs
Gene Regulation
Non-Coding RNA
Gene Expression
Small Nucleolar RNAs
Long Non-Coding RNAs
Fungal Genomics
Small Interfering RNAs
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Sclerotinia stem rot caused by Sclerotinia sclerotiorum affects canola production worldwide. Emerging evidence suggests that long non-coding RNAs (lncRNAs) play important roles in the regulation of gene expression in plants, in response to both abiotic and biotic stress. So far, identification of lncRNAs has been limited to a few model plant species, and their roles in mediating responses to biotic stresses are yet to be characterized in Brassica napus. The present study reports the identification of novel lncRNAs responsive to S. sclerotiorum infection in B. napus at two time points after infection (24 hpi and 48 hpi) using a stranded RNA-Sequencing technique and a detection pipeline for lncRNAs. Of the total 3,181 lncRNA candidates, 2,821 lncRNAs were intergenic, 111 were natural antisense transcripts, 76 possessed exonic overlap with the reference coding transcripts while the remaining 173 represented novel lnc- isoforms. Forty one lncRNAs were identified as the precursors for microRNAs (miRNAs) including miR156, miR169 and miR394, with significant roles in mediating plant responses to fungal phytopathogens. A total of 931 differentially expressed lncRNAs were identified in response to S. sclerotiorum infection and the expression of 12 such lncRNAs was further validated using qRT-PCR. B. napus antisense lncRNA, TCONS_00000966, having 90% overlap with a plant defensin gene, showed significant induction at both infection stages, suggesting its involvement in the transcriptional regulation of defense responsive genes under S. sclerotiorum infection. Additionally, nine lncRNAs showed overlap with cis-regulatory regions of differentially expressed genes of B. napus. Quantitative RT-PCR verification of a set of S. sclerotiorum responsive sense/antisense transcript pairs revealed contrasting expression patterns, supporting the hypothesis that steric clashes of transcriptional machinery may lead to inactivation of sense promoter. Our findings highlight the potential contributions of lncRNAs in regulating expression of plant genes that respond to biotic stress.
Date created
2016
DOI
doi:10.7939/R3707X255
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Attribution 4.0 International
Citation for previous publication
Joshi, R. K., Megha, S., Basu, U., Rahman, M. H., & Kav, N. N. V. (2016). Genome wide identification and functional prediction of long non-coding RNAs responsive to Sclerotinia sclerotiorum infection in Brassica napus. PLoS ONE, 11(7), e0158784 [19 pages].  http://dx.doi.org/10.1371/journal.pone.0158784

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File title: Genome Wide Identification and Functional Prediction of Long Non-Coding RNAs Responsive to Sclerotinia sclerotiorum Infection in Brassica napus
File author: Raj Kumar Joshi, Swati Megha, Urmila Basu, Muhammad H. Rahman, Nat N. V. Kav
Page count: 19
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