Production of dsRNA sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen Phytophthora parasitica.

Species of the oomycete genus Phytophthora are destructive pathogens, causing extensive losses in agricultural crops and natural ecosystems. A potential disease control approach is the application of RNA silencing technology which has proven to be effective in improving plant resistance against a wi...

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Autores principales:	Meixiang Zhang, Qinhu Wang, Ke Xu, Yuling Meng, Junli Quan, Weixing Shan
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ffc8fa9b08764ef39f209385bcf2164d
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spelling	oai:doaj.org-article:ffc8fa9b08764ef39f209385bcf2164d2021-11-18T07:33:34ZProduction of dsRNA sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen Phytophthora parasitica.1932-620310.1371/journal.pone.0028114https://doaj.org/article/ffc8fa9b08764ef39f209385bcf2164d2011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22140518/?tool=EBIhttps://doaj.org/toc/1932-6203Species of the oomycete genus Phytophthora are destructive pathogens, causing extensive losses in agricultural crops and natural ecosystems. A potential disease control approach is the application of RNA silencing technology which has proven to be effective in improving plant resistance against a wide range of pests including parasitic plants, nematodes, insects and fungi. In this study, we tested the potential application of RNA silencing in improving plant disease resistance against oomycete pathogens. The endogenous P. parasitica gene PnPMA1 and the reporter gene GFP were used to evaluate the potential application of host induced gene silencing (HIGS). The GFP-expressing P. parasitica efficiently colonized Arabidopsis thaliana lines stably expressing GFP dsRNA and showed no obvious decrease in GFP signal intensity. Quantitative RT-PCR analyses showed no significant reductions in the abundance of GFP and PnPMA1 transcripts in P. parasitica during colonization of A. thaliana lines stably expressing GFP and PnPMA1 dsRNAs, respectively. Neither GFP siRNAs nor PnPMA1 siRNAs produced by transgenic plants were detected in P. parasitica re-isolated from infected tissues by Northern blot analyses. Phenotypic characterization of zoospores released from infected plant roots expressing PnPMA1 dsRNA showed no motility changes compared with those from wild-type plants. Similar results were obtained by analysis of zoospores released from sporulating hyphae of P. parasitica re-isolated from PnPMA1 dsRNA-expressing plant roots. Thus, the ectopic expression of dsRNA sequences in the host plant is not sufficient to initiate silencing of homologous genes in the colonizing oomycete pathogen, and this may be due to a number of different reasons including the absence of genetic machinery required for uptake of silencing signals in particular dsRNAs which are essential for environmental RNA silencing.Meixiang ZhangQinhu WangKe XuYuling MengJunli QuanWeixing ShanPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 11, p e28114 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Meixiang Zhang Qinhu Wang Ke Xu Yuling Meng Junli Quan Weixing Shan Production of dsRNA sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen Phytophthora parasitica.
description	Species of the oomycete genus Phytophthora are destructive pathogens, causing extensive losses in agricultural crops and natural ecosystems. A potential disease control approach is the application of RNA silencing technology which has proven to be effective in improving plant resistance against a wide range of pests including parasitic plants, nematodes, insects and fungi. In this study, we tested the potential application of RNA silencing in improving plant disease resistance against oomycete pathogens. The endogenous P. parasitica gene PnPMA1 and the reporter gene GFP were used to evaluate the potential application of host induced gene silencing (HIGS). The GFP-expressing P. parasitica efficiently colonized Arabidopsis thaliana lines stably expressing GFP dsRNA and showed no obvious decrease in GFP signal intensity. Quantitative RT-PCR analyses showed no significant reductions in the abundance of GFP and PnPMA1 transcripts in P. parasitica during colonization of A. thaliana lines stably expressing GFP and PnPMA1 dsRNAs, respectively. Neither GFP siRNAs nor PnPMA1 siRNAs produced by transgenic plants were detected in P. parasitica re-isolated from infected tissues by Northern blot analyses. Phenotypic characterization of zoospores released from infected plant roots expressing PnPMA1 dsRNA showed no motility changes compared with those from wild-type plants. Similar results were obtained by analysis of zoospores released from sporulating hyphae of P. parasitica re-isolated from PnPMA1 dsRNA-expressing plant roots. Thus, the ectopic expression of dsRNA sequences in the host plant is not sufficient to initiate silencing of homologous genes in the colonizing oomycete pathogen, and this may be due to a number of different reasons including the absence of genetic machinery required for uptake of silencing signals in particular dsRNAs which are essential for environmental RNA silencing.
format	article
author	Meixiang Zhang Qinhu Wang Ke Xu Yuling Meng Junli Quan Weixing Shan
author_facet	Meixiang Zhang Qinhu Wang Ke Xu Yuling Meng Junli Quan Weixing Shan
author_sort	Meixiang Zhang
title	Production of dsRNA sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen Phytophthora parasitica.
title_short	Production of dsRNA sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen Phytophthora parasitica.
title_full	Production of dsRNA sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen Phytophthora parasitica.
title_fullStr	Production of dsRNA sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen Phytophthora parasitica.
title_full_unstemmed	Production of dsRNA sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen Phytophthora parasitica.
title_sort	production of dsrna sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen phytophthora parasitica.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/ffc8fa9b08764ef39f209385bcf2164d
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Production of dsRNA sequences in the host plant is not sufficient to initiate gene silencing in the colonizing oomycete pathogen Phytophthora parasitica.

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