Skip to main content

Research Repository

Advanced Search

Molecular characterisation of defence of Brassica napus (Oilseed rape) to Rhizoctonia solani AG2-1 confirmed by functional analysis in Arabidopsis thaliana

Sims, Isabelle; Jayaweera, Dasuni; Swarup, Kamal; Ray, Rumiana V.

Molecular characterisation of defence of Brassica napus (Oilseed rape) to Rhizoctonia solani AG2-1 confirmed by functional analysis in Arabidopsis thaliana Thumbnail


Authors

Isabelle Sims

Kamal Swarup



Abstract

Rhizoctonia solani is a necrotrophic, soilborne fungal pathogen associated with significant establishment losses in Brassica napus (oilseed rape; OSR). The anastomosis group (AG) 2-1 of R. solani is the most virulent to OSR, causing damping-off, root and hypocotyl rot, and seedling death. Resistance to R. solani AG2-1 in OSR has not been identified, and the regulation of OSR defense to its adapted pathogen, AG2-1, has not been investigated. In this work, we used confocal microscopy to visualize the progress of infection by sclerotia of AG2-1 on B. napus varieties with contrasting disease phenotypes. We defined their defense response using gene expression studies and functional analysis with Arabidopsis thaliana mutants. Our results showed existing variation in susceptibility to AG2-1 and plant growth between OSR varieties, and differential expression of genes of hormonal and defense pathways related to auxin, ethylene, jasmonic acid, abscisic acid, salicylic acid, and reactive oxygen species regulation. Auxin, abscisic acid signaling, and the MYC2 branch of jasmonate signaling contributed to the susceptibility to AG2-1, while induced systemic resistance was enhanced by NAPDH RBOHD, ethylene signaling, and the ERF/PDF branch of jasmonate signaling. These results pave the way for future research, which will lead to the development of Brassica crops that are more resistant to AG2-1 of R. solani and reduce dependence on chemical control options.

Citation

Sims, I., Jayaweera, D., Swarup, K., & Ray, R. V. (2023). Molecular characterisation of defence of Brassica napus (Oilseed rape) to Rhizoctonia solani AG2-1 confirmed by functional analysis in Arabidopsis thaliana. Phytopathology, 113(8), 1525-1536. https://doi.org/10.1094/PHYTO-08-22-0305-R

Journal Article Type Article
Acceptance Date Mar 13, 2023
Online Publication Date Oct 3, 2023
Publication Date 2023-08
Deposit Date Jan 26, 2024
Publicly Available Date Jan 30, 2024
Journal Phytopathology
Print ISSN 0031-949X
Electronic ISSN 1943-7684
Publisher American Phytopathological Society
Peer Reviewed Peer Reviewed
Volume 113
Issue 8
Pages 1525-1536
DOI https://doi.org/10.1094/PHYTO-08-22-0305-R
Keywords Plant Immune Responses, Disease Control and Pest Management, Molecular, Disease Resistance, Host Parasite Interactions, Fungal Pathogens
Public URL https://nottingham-repository.worktribe.com/output/19287061
Publisher URL ttps://apsjournals.apsnet.org/doi/10.1094/PHYTO-08-22-0305-R

Files





You might also like



Downloadable Citations