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- W3130789897 abstract "Abstract Genetic resistance to blackleg ( Leptosphaeria maculans , Lm ) of canola ( Brassica napus , Bn ) has been extensively studied, but the mechanisms underlying the host–pathogen interaction are still not well understood. Here, a comparative transcriptome analysis was performed on a resistant doubled haploid Bn line carrying the resistance gene Rlm1 following inoculation with a virulent ( avrLm1 ) or avirulent ( AvrLm1 ) Lm isolate on cotyledons. A total of 6999 and 3015 differentially expressed genes (DEGs) were identified, respectively, in inoculated local tissues with compatible (susceptible) and incompatible (resistant) interactions. Functional enrichment analysis found several biological processes, including protein targeting to membrane, ribosome and negative regulation of programmed cell death, were over-represented exclusively among up-regulated DEGs in the resistant reaction, whereas significant enrichment of salicylic acid (SA) and jasmonic acid (JA) pathways observed for down-regulated DEGs occurred only in the susceptible reaction. A heat-map analysis showed that both biosynthesis and signaling of SA and JA were induced more significantly in the resistant reaction, implying that a threshold level of SA and JA signaling is required for the activation of Rlm1 -mediated resistance. Co-expression network analysis revealed close correlation of a gene module with the resistance, involving DEGs regulating pathogen-associated molecular pattern recognition, JA signaling and transcriptional reprogramming. Substantially fewer DEGs were identified in mock-inoculated (control) cotyledons, relative to those in inoculated local tissues, including those involved in SA pathways potentially contributing to systemic acquired resistance (SAR). Pre-inoculation of cotyledon with either an avirulent or virulent Lm isolate, however, failed to induce SAR on remote tissues of same plant despite elevated SA and PR1 protein. This study provides insights into the molecular mechanism of Rlm1 -mediated resistance to blackleg." @default.
- W3130789897 created "2021-03-01" @default.
- W3130789897 creator A5004084347 @default.
- W3130789897 creator A5038793805 @default.
- W3130789897 creator A5054220857 @default.
- W3130789897 creator A5076821284 @default.
- W3130789897 creator A5084184202 @default.
- W3130789897 date "2021-02-23" @default.
- W3130789897 modified "2023-10-16" @default.
- W3130789897 title "Genome-wide transcriptome reveals mechanisms underlying Rlm1-mediated blackleg resistance on canola" @default.
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