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Arabidopsis thaliana cultivar:Col-0

ABSTRACT: Cyst nematode parasitism induces dynamic changes in the epigenome of Arabidopsis roots

PROVIDER: PRJNA353359 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5031530.fastq.gz	Fastqsanger.gz
	SRR5031521_1.fastq.gz	Fastqsanger.gz
	SRR5031521_2.fastq.gz	Fastqsanger.gz
	SRR5031522.fastq.gz	Fastqsanger.gz
	SRR5031523.fastq.gz	Fastqsanger.gz

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Col-0 vs rbohD/F

Project description:This experiment analyzes the changes in expression of twelve days old Arabidopsis roots after 10 hours of beet cyst nematode Heterodera schachtii treatment

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Project description:Plant-parasitic cyst nematodes induce the formation of hypermetabolic feeding sites, termed syncytia, as their sole source of nutrients. The formation of the syncytium is orchestrated by the nematode in part by modulation of phytohormone responses, including cytokinin. In response to infection by the nematode H. schachtii, cytokinin signaling is transiently induced at the site of infection and in the developing syncytium. Arabidopsis lines with reduced cytokinin sensitivity show reduced susceptibility to nematode infection, indicating that cytokinin signaling is required for optimal nematode development. Furthermore, lines with increased cytokinin sensitivity also exhibit reduced nematode susceptibility. To ascertain why cytokinin hypersensitivity reduces nematode parasitism, we examined the transcriptomes in wild-type and a cytokinin-hypersensitive type-A arr Arabidopsis mutant in response to H. schachtii infection. Genes involved in the response to biotic stress and defense response were elevated in the type-A arr mutant in the absence of nematodes and were hyper-induced following H. schachtii infection, which suggests that the Arabidopsis type-A arr mutants impede nematode development because they are primed to respond to pathogen infection. These results suggest that cytokinin signaling is required for optimal H. schachtii parasitism of Arabidopsis, but that elevated cytokinin signaling triggers a heightened immune response to nematode infection.

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Project description:Cereal cyst nematode (Heterodera avenae) can be attracted by wheat roots before infestation, while largely is unknown underlying this phenomenon. Here, we examined the transcriptional responses of both wheat roots and nematodes during the attraction stage by mRNA sequencing analysis (with and without reference genome, respectively). We found that consistent with their respective mobility, the immobile host wheat root only had 93 DEGs (27 up-regulated and 66 down-regulated), while the mobile plant parasitic nematode H. avenae reacted much more actively with 879 DEGs (867 up-regulated and 12 down-regulated). Among the DEGs, a number of wheat DEGs (most down-regulated) were involved in biotic stress pathways, while several putative effector genes (up-regulated) were found in the nematode DEGs. Results of the experiments demonstrated that nematode responds more actively than wheat during the attraction stage of parasitism, and the parasite responses mainly involved up-regulation whereas the host responses mainly involved down-regulation.

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Col-0 leaves and root, control and iron-deficient

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Microarray from roots of Arabidopsis Col-0 and knock-down UPL3, infected and non-infected with Heterodera schachtii

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