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Pratylenchus penetrans

ABSTRACT: Pratylenchus penetrans overview

PROVIDER: PRJNA1034707 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12798434_1.fastq.gz	Fastqsanger.gz
	SRR12798434_2.fastq.gz	Fastqsanger.gz
	SRR2962932_1.fastq.gz	Fastqsanger.gz
	SRR2962932_2.fastq.gz	Fastqsanger.gz
	SRR2962993_1.fastq.gz	Fastqsanger.gz

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Project description:Similar to other plant-parasitic nematodes, root lesion nematodes possess an array of enzymes that are involved in degradation of the plant cell wall. Here we report the identification of a gene encoding a cell wall degrading enzyme, pectin methylesterase PME (EC 3.1.1.11), in the root lesion nematode Pratylenchus penetrans. Both genomic and coding sequences of the gene were cloned for this species, showing the presence of four introns that excluded a potential bacterial contamination. Expression of the Pp-pme gene was localized in the esophageal glands of P. penetrans as determined by in situ hybridization. Temporal expression of Pp-pme in planta was validated for early time points of infection. The possible function and activity of the gene were assessed by transient expression of Pp-pme in N. benthamiana plants via a Potato virus X-based vector. To our knowledge, this is the first report on identification and characterization of a PME gene within the phylum Nematoda.

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Project description:Pratylenchus penetrans is one of the most important species of root lesion nematodes (RLNs) because of its detrimental and economic impact in a wide range of crops. Similar to other plant-parasitic nematodes (PPNs), P. penetrans harbours a significant number of secreted proteins that play key roles during parasitism. Here, we combined spatially and temporally resolved next-generation sequencing datasets of P. penetrans to select a list of candidate genes aimed at the identification of a panel of effector genes for this species. We determined the spatial expression of transcripts of 22 candidate effectors within the oesophageal glands of P. penetrans by in situ hybridization. These comprised homologues of known effectors of other PPNs with diverse putative functions, as well as novel pioneer effectors specific to RLNs. It is noteworthy that five of the pioneer effectors encode extremely proline-rich proteins. We then combined in situ localization of effectors with available genomic data to identify a non-coding motif enriched in promoter regions of a subset of P. penetrans effectors, and thus a putative hallmark of spatial expression. Expression profiling analyses of a subset of candidate effectors confirmed their expression during plant infection. Our current results provide the most comprehensive panel of effectors found for RLNs. Considering the damage caused by P. penetrans, this information provides valuable data to elucidate the mode of parasitism of this nematode and offers useful suggestions regarding the potential use of P. penetrans-specific target effector genes to control this important pathogen.

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