Comparison of transcriptome profiles by Fusarium oxysporum inoculation between Fusarium yellows resistant and susceptible lines in Brassica rapa L

Key message Resistant and susceptible lines in Brassica rapa have different immune responses against Fusarium oxysporum inoculation. Fusarium yellows caused by Fusarium oxysporum f. sp. conglutinans ( Foc ) is an important disease of Brassicaceae; however, the mechanism of how host plants respond to...

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Veröffentlicht in:Plant cell reports 2017-12, Vol.36 (12), p.1841-1854
Hauptverfasser: Miyaji, Naomi, Shimizu, Motoki, Miyazaki, Junji, Osabe, Kenji, Sato, Maho, Ebe, Yusuke, Takada, Satoko, Kaji, Makoto, Dennis, Elizabeth S., Fujimoto, Ryo, Okazaki, Keiichi
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container_end_page 1854
container_issue 12
container_start_page 1841
container_title Plant cell reports
container_volume 36
creator Miyaji, Naomi
Shimizu, Motoki
Miyazaki, Junji
Osabe, Kenji
Sato, Maho
Ebe, Yusuke
Takada, Satoko
Kaji, Makoto
Dennis, Elizabeth S.
Fujimoto, Ryo
Okazaki, Keiichi
description Key message Resistant and susceptible lines in Brassica rapa have different immune responses against Fusarium oxysporum inoculation. Fusarium yellows caused by Fusarium oxysporum f. sp. conglutinans ( Foc ) is an important disease of Brassicaceae; however, the mechanism of how host plants respond to Foc is still unknown. By comparing with and without Foc inoculation in both resistant and susceptible lines of Chinese cabbage ( Brassica rapa var. pekinensis ), we identified differentially expressed genes (DEGs) between the bulked inoculated (6, 12, 24, and 72 h after inoculation (HAI)) and non-inoculated samples. Most of the DEGs were up-regulated by Foc inoculation. Quantitative real-time RT-PCR showed that most up-regulated genes increased their expression levels from 24 HAI. An independent transcriptome analysis at 24 and 72 HAI was performed in resistant and susceptible lines. GO analysis using up-regulated genes at 24 HAI indicated that Foc inoculation activated systemic acquired resistance (SAR) in resistant lines and tryptophan biosynthetic process and responses to chitin and ethylene in susceptible lines. By contrast, GO analysis using up-regulated genes at 72 HAI showed the overrepresentation of some categories for the defense response in susceptible lines but not in the resistant lines. We also compared DEGs between B. rapa and Arabidopsis thaliana after F. oxysporum inoculation at the same time point, and identified genes related to defense response that were up-regulated in the resistant lines of Chinese cabbage and A. thaliana . Particular genes that changed expression levels overlapped between the two species, suggesting that they are candidates for genes involved in the resistance mechanisms against F. oxysporum .
doi_str_mv 10.1007/s00299-017-2198-9
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Fusarium yellows caused by Fusarium oxysporum f. sp. conglutinans ( Foc ) is an important disease of Brassicaceae; however, the mechanism of how host plants respond to Foc is still unknown. By comparing with and without Foc inoculation in both resistant and susceptible lines of Chinese cabbage ( Brassica rapa var. pekinensis ), we identified differentially expressed genes (DEGs) between the bulked inoculated (6, 12, 24, and 72 h after inoculation (HAI)) and non-inoculated samples. Most of the DEGs were up-regulated by Foc inoculation. Quantitative real-time RT-PCR showed that most up-regulated genes increased their expression levels from 24 HAI. An independent transcriptome analysis at 24 and 72 HAI was performed in resistant and susceptible lines. GO analysis using up-regulated genes at 24 HAI indicated that Foc inoculation activated systemic acquired resistance (SAR) in resistant lines and tryptophan biosynthetic process and responses to chitin and ethylene in susceptible lines. By contrast, GO analysis using up-regulated genes at 72 HAI showed the overrepresentation of some categories for the defense response in susceptible lines but not in the resistant lines. We also compared DEGs between B. rapa and Arabidopsis thaliana after F. oxysporum inoculation at the same time point, and identified genes related to defense response that were up-regulated in the resistant lines of Chinese cabbage and A. thaliana . 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Fusarium yellows caused by Fusarium oxysporum f. sp. conglutinans ( Foc ) is an important disease of Brassicaceae; however, the mechanism of how host plants respond to Foc is still unknown. By comparing with and without Foc inoculation in both resistant and susceptible lines of Chinese cabbage ( Brassica rapa var. pekinensis ), we identified differentially expressed genes (DEGs) between the bulked inoculated (6, 12, 24, and 72 h after inoculation (HAI)) and non-inoculated samples. Most of the DEGs were up-regulated by Foc inoculation. Quantitative real-time RT-PCR showed that most up-regulated genes increased their expression levels from 24 HAI. An independent transcriptome analysis at 24 and 72 HAI was performed in resistant and susceptible lines. GO analysis using up-regulated genes at 24 HAI indicated that Foc inoculation activated systemic acquired resistance (SAR) in resistant lines and tryptophan biosynthetic process and responses to chitin and ethylene in susceptible lines. 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Fusarium yellows caused by Fusarium oxysporum f. sp. conglutinans ( Foc ) is an important disease of Brassicaceae; however, the mechanism of how host plants respond to Foc is still unknown. By comparing with and without Foc inoculation in both resistant and susceptible lines of Chinese cabbage ( Brassica rapa var. pekinensis ), we identified differentially expressed genes (DEGs) between the bulked inoculated (6, 12, 24, and 72 h after inoculation (HAI)) and non-inoculated samples. Most of the DEGs were up-regulated by Foc inoculation. Quantitative real-time RT-PCR showed that most up-regulated genes increased their expression levels from 24 HAI. An independent transcriptome analysis at 24 and 72 HAI was performed in resistant and susceptible lines. GO analysis using up-regulated genes at 24 HAI indicated that Foc inoculation activated systemic acquired resistance (SAR) in resistant lines and tryptophan biosynthetic process and responses to chitin and ethylene in susceptible lines. 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subjects Biomedical and Life Sciences
Biotechnology
Brassica
Brassica - drug effects
Brassica - genetics
Brassica - microbiology
Brassica oleracea
Brassica rapa
Brassica rapa - drug effects
Brassica rapa - genetics
Brassica rapa - microbiology
Cell Biology
Chinese cabbage
Chitin
Chitin - pharmacology
Ethylenes - pharmacology
Fusarium
Fusarium - physiology
Fusarium oxysporum
Gene expression
Gene Expression Profiling - methods
Gene Expression Regulation, Plant - genetics
Gene Expression Regulation, Plant - physiology
Genes
Genotype & phenotype
Host plants
Immune response
Inoculation
Life Sciences
Original Article
Plant Biochemistry
Plant diseases
Plant Sciences
Plants (botany)
Polymerase chain reaction
Transcriptome - genetics
Tryptophan
Yellows
title Comparison of transcriptome profiles by Fusarium oxysporum inoculation between Fusarium yellows resistant and susceptible lines in Brassica rapa L
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