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Systemic and transgenerational smRNA-seq profile upon nematode-infection in rice

ABSTRACT: small RNA expression in systemic and intergenerational tissues upon nematode-infection in rice

PROVIDER: PRJEB42642 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR4007470.fastq.gz	Fastqsanger.gz
	ERR4007500.fastq.gz	Fastqsanger.gz
	ERR4007520.fastq.gz	Fastqsanger.gz
	ERR4007540.fastq.gz	Fastqsanger.gz
	ERR4007550.fastq.gz	Fastqsanger.gz

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systemic and transgenerational sRNA-seq profile in control and nematode-infected rice plants

Project description:small RNA expression in systemic and intergenerational tissues in control and nematode-infected rice plants

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Systemic suppression of the rice shoot metabolism upon root rot nematode infection

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Systemic suppression of the shoot metabolism upon rice root nematode infection.

Project description:Hirschmanniella oryzae is the most common plant-parasitic nematode in flooded rice cultivation systems. These migratory animals penetrate the plant roots and feed on the root cells, creating large cavities, extensive root necrosis and rotting. The objective of this study was to investigate the systemic response of the rice plant upon root infection by this nematode. RNA sequencing was applied on the above-ground parts of the rice plants at 3 and 7 days post inoculation. The data revealed significant modifications in the primary metabolism of the plant shoot, with a general suppression of for instance chlorophyll biosynthesis, the brassinosteroid pathway, and amino acid production. In the secondary metabolism, we detected a repression of the isoprenoid and shikimate pathways. These molecular changes can have dramatic consequences for the growth and yield of the rice plants, and could potentially change their susceptibility to above-ground pathogens and pests.

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Genome-wide expression profiling of nematode-trapping fungus Arthrobotrys oligospora TWF154 upon nematode exposure

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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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Nematode infection migratory stage

Project description:This experiment analyzes the changes in expression of twelve days old Arabidopsis roots at ten hours post inoculation upon cyst nematode H. schachtii infection.

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