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Arabidopsis thaliana

ABSTRACT: Root-knot nematodes infection transcriptome in Arabidopsis

PROVIDER: PRJDB5797 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR187033.fastq.gz	Fastqsanger.gz
	DRR187034.fastq.gz	Fastqsanger.gz
	DRR187035.fastq.gz	Fastqsanger.gz
	DRR187036.fastq.gz	Fastqsanger.gz
	DRR187037.fastq.gz	Fastqsanger.gz

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Transcription profiling of host response to root-knot nematode infection in Arabidopsis

Project description:During a compatible interaction, root-knot nematodes (Meloidogyne spp.) induce the redifferentiation of root cells into multinucleate nematode feeding cells giant cells. These hypertrophied cells result from repeated nuclear divisions without cytokinesis, are metabolically active and present features typical of transfer cells. Hyperplasia of the surrounding cells leads to formation of the typical root gall. We investigate here the plant response to root-knot nematodes.

2005-01-11 | E-MEXP-233 | biostudies-arrayexpress

Transcriptional reprogramming by root knot and migratory nematode infection in rice

Project description:In this study a comparison was made between the local transcriptional changes at two time points upon root knot (Meloidogyne graminicola) and migratory nematode (Hirschmanniella oryzae) infection in rice. Using mRNA-Seq we have characterized specific and general responses of the root challenged with these endoparastic root nematodes with very different modes of action. Root knot nematodes induce major developmental reprogramming of the root tip, where they force the cortical cells to form multinucleate giant cells, resulting in gall-development. Our results show that root knot nematodes force the plant to produce and transfer nutrients, like sugars and amino acids, to this tissue. Migratory nematodes, on the other hand, induce the expression of proteins involved in plant death and oxidative stress, and obstruct the normal metabolic activity of the root. While migratory nematode infection also causes upregulation of biotic stress-related genes early in the infection, the root knot nematodes seem to actively suppress the local defence of the plant root. This is exemplified by a downregulation of genes involved in the salicylic acid and ethylene pathways. Interestingly, hormone pathways usually involved in plant development, were strongly induced (auxin and gibberellin) or repressed (cytokinin) in the galls. In addition, thousands of novel transcriptionally active regions as well as highly expressed nematode transcripts were detected in the infected root tissues. These results uncover previously unrecognized nematode-specific expression profiles and provide an interesting starting point to study the physiological function of many yet unannotated transcripts potentially targeted by these nematodes.

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Differentially expressed small RNAs in Arabidopsis galls formed by Meloidogyne javanica

Project description:Root-knot nematodes (RKNs) induce inside the vascular cylinder the giant cells (GCs) imbibed into a gall. Gene-repression in early developing GCs could be facilitated by small RNAs (sRNA) as miRNAs. 24nt-sRNAs, rasiRNAs and 21-22nt-sRNAs can also mediate epigenetic mechanisms. Three sRNA libraries from 3dpi galls and three from uninfected root segments were sequenced following Illumina-Solexa technology.

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Project description:Plant-parasitic root-knot nematodes (Meloidogyne species) are highly polyphagous parasites that infect a wide variety of plants, including economically important crops. These parasites modulate cellular identity of terminally differentiated root cells to induce the formation of giant-cells and knot-like structures (galls), creating new organs in infected plant roots. In this study, we generated single cell RNA-seq data of galls and neighboring root tissues at two distinct stages of M. incognita infection of tomato plants.

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Project description:We compared the gene expression of wild-type Col-0 and a T-DNA mutant SALK_116381C (opr2-1). We either infected or mock-infected the plants with the root knot nematode Meloidogyne incognita and measured the root transcriptome after 0, 1, 4, and 7 days post infection using RNA-seq. The aim of the experiment was to determine whether opr2-1 affected gene expression patterns induced by nematode infection.

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Differentially expressed small RNAs in Arabidopsis galls formed by Meloidogyne javanica

2015-11-19 | E-GEOD-71563 | biostudies-arrayexpress

Project description:Root-knot nematodes Bacteria

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Transcriptome of galls formed by Meloidogyne javanica in Arabidopsis thaliana at 3 days post infection

Project description:The goal of this study is to compare the transcriptome profilling (RNA-seq) of galls (G) formed in Arabidopsis roots infected by Meloidogyne javanica at 3 days post infection compared to uninfected root segments (RC).

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