RNA interference of an orthologue of Dicer of Meloidogyne incognita alludes to the gene’s importance in nematode development

Abstract Dicers and dicer-like enzymes play an essential role in small RNA processing in eukaryotes. Nematodes are thought to encode one dicer, DCR-1; only that for Caenorhabditis spp. is well-characterised. Using genomic sequences of eight root-knot nematodes (Meloidogyne spp.), we identified putat...

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Autores principales:	Sadia Iqbal, Michael G. K. Jones, John Fosu-Nyarko
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ab95e99fd8c1472e8bcc70e090c5b03c
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spelling	oai:doaj.org-article:ab95e99fd8c1472e8bcc70e090c5b03c2021-12-02T15:49:35ZRNA interference of an orthologue of Dicer of Meloidogyne incognita alludes to the gene’s importance in nematode development10.1038/s41598-021-90363-82045-2322https://doaj.org/article/ab95e99fd8c1472e8bcc70e090c5b03c2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90363-8https://doaj.org/toc/2045-2322Abstract Dicers and dicer-like enzymes play an essential role in small RNA processing in eukaryotes. Nematodes are thought to encode one dicer, DCR-1; only that for Caenorhabditis spp. is well-characterised. Using genomic sequences of eight root-knot nematodes (Meloidogyne spp.), we identified putative coding sequences typical of eukaryotic DICERS. We noted that the primary and secondary structures of DICERS they encode were different for different Meloidogyne species and even for isolates of the same species, suggesting paralogy for the gene. One of the genes for M. incognita (Midcr-1.1) expressed in eggs, juvenile stage 2 and adults, with the highest expression in the adult females. All the Meloidogyne DICERS had seven major domains typical of those for Caenorhabditis spp. and humans with very similar protein folding. RNAi of Midcr-1.1 in J2s using seven dsRNAs, each based on sequences encoding the domains, induced mild paralysis but measurable knockdown was detected in J2s treated with five of the dsRNAs. For four of the dsRNAs, the RNAi effect lasted and reduced the nematode’s infectivity. Also, host plant delivery of dsRNAs complementary to coding sequences of the Dicer Dimerisation domain impaired development, reducing nematode infection by 71%. These results confirm the importance of the gene to nematode health.Sadia IqbalMichael G. K. JonesJohn Fosu-NyarkoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sadia Iqbal Michael G. K. Jones John Fosu-Nyarko RNA interference of an orthologue of Dicer of Meloidogyne incognita alludes to the gene’s importance in nematode development
description	Abstract Dicers and dicer-like enzymes play an essential role in small RNA processing in eukaryotes. Nematodes are thought to encode one dicer, DCR-1; only that for Caenorhabditis spp. is well-characterised. Using genomic sequences of eight root-knot nematodes (Meloidogyne spp.), we identified putative coding sequences typical of eukaryotic DICERS. We noted that the primary and secondary structures of DICERS they encode were different for different Meloidogyne species and even for isolates of the same species, suggesting paralogy for the gene. One of the genes for M. incognita (Midcr-1.1) expressed in eggs, juvenile stage 2 and adults, with the highest expression in the adult females. All the Meloidogyne DICERS had seven major domains typical of those for Caenorhabditis spp. and humans with very similar protein folding. RNAi of Midcr-1.1 in J2s using seven dsRNAs, each based on sequences encoding the domains, induced mild paralysis but measurable knockdown was detected in J2s treated with five of the dsRNAs. For four of the dsRNAs, the RNAi effect lasted and reduced the nematode’s infectivity. Also, host plant delivery of dsRNAs complementary to coding sequences of the Dicer Dimerisation domain impaired development, reducing nematode infection by 71%. These results confirm the importance of the gene to nematode health.
format	article
author	Sadia Iqbal Michael G. K. Jones John Fosu-Nyarko
author_facet	Sadia Iqbal Michael G. K. Jones John Fosu-Nyarko
author_sort	Sadia Iqbal
title	RNA interference of an orthologue of Dicer of Meloidogyne incognita alludes to the gene’s importance in nematode development
title_short	RNA interference of an orthologue of Dicer of Meloidogyne incognita alludes to the gene’s importance in nematode development
title_full	RNA interference of an orthologue of Dicer of Meloidogyne incognita alludes to the gene’s importance in nematode development
title_fullStr	RNA interference of an orthologue of Dicer of Meloidogyne incognita alludes to the gene’s importance in nematode development
title_full_unstemmed	RNA interference of an orthologue of Dicer of Meloidogyne incognita alludes to the gene’s importance in nematode development
title_sort	rna interference of an orthologue of dicer of meloidogyne incognita alludes to the gene’s importance in nematode development
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ab95e99fd8c1472e8bcc70e090c5b03c
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RNA interference of an orthologue of Dicer of Meloidogyne incognita alludes to the gene’s importance in nematode development

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