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Analysis of transcriptional response to mutated Potyvirus Potato virus A that induces necrotic symptoms.

ABSTRACT: Mutations introduced to a highly variable region in HCpro reduced HCpro-HIP2 interactions and virulence of PVA, and induced novel types of necrotic symptoms in the systemically infected leaves of Nicotiana species. Microarray-based analysis of gene expression revealed induction of large numbers of defence-related genes including jasmonic acid and ethylene inducible pathways in the leaves systemically infected by the mutated PVA.

ORGANISM(S): Nicotiana tabacum

PROVIDER: GSE42833 | GEO | 2013/03/23

SECONDARY ACCESSION(S): PRJNA183700

REPOSITORIES: GEO

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Analysis of transcriptional response to mutated Potyvirus Potato virus A that induces necrotic symptoms.

Project description:Mutations introduced to a highly variable region in HCpro reduced HCpro-HIP2 interactions and virulence of PVA, and induced novel types of necrotic symptoms in the systemically infected leaves of Nicotiana species. Microarray-based analysis of gene expression revealed induction of large numbers of defence-related genes including jasmonic acid and ethylene inducible pathways in the leaves systemically infected by the mutated PVA. Three treaments: infection with wild type PVA (WT), infection with mutated PVA (MUT), and mock-inoculation (Mock). Six plants were treated for each treatment. Experiment was repeated three times. WT and MUT samples from all three experiments were hybridised on microarray. Mock samples from experiments 1 and 2 were hybridised as healthy controls.

2013-03-23 | E-GEOD-42833 | biostudies-arrayexpress

Microarray transcription profiling of healthy and PVYNTN infected potato tuber tissues (necrotic and non-necrotic)

Project description:To extend our understanding of systemic necrosis in susceptible potato tubers infected with the necrotic strain of Potato virus Y (PVYNTN) gene expression was compared between healthy and infected non-necrotic and necrotic (both non-necrotic and necrotic tissue) potato tubers.

2018-05-16 | E-MTAB-5776 | biostudies-arrayexpress

Local and systemic gene expression in potato infected with PVY

Project description:The goal of these studies is analysis of gene expression profiles in potato plants infected with potato virus Y (necrotic strain - PVYN). A prototypic plant pathogen interaction system used to study disease resistance is tobacco (Nicotiana tabacum) and tobacco mosaic virus (TMV). In tobacco, the resistance response comprises two phenomena, known as the hypersensitive response (HR) and systemic acquired resistance (SAR). HR is typically characterized by a local necrosis surrounding the site of viral entry leading to restriction of pathogen replication and spread. SAR is the enhanced ability of the plant to resist a secondary challenge by the same or a different pathogen inoculated elsewhere on the plant. The identity of the signal(s) that induces HR and SAR is still poorly understood. Plants of S. tuberosum cv. Rywal, resistant to all known (N, 0, NTN) PVY strains, were grown in growth chambers using 16 h period of light (22°C) and 8 h of darkness (18°C). For all experiments, 6-week-old plants were used. For inoculation with PVY, carborundum-dusted leaves were rubbed with water (mock control) or PVYN solution (1 µg ml-1). Two to four leaves were inoculated on each plant and harvested together at 1, 3, and 6 days post inoculation (dpi). Separately, noninoculated leaves were harvested at the same time points (upper leaves). The first time point (1 dpi) has been chosen to study the early stage of plant response before necrotic lesion formation. At 3 dpi necrotic lesions start to appear, and at 6 dpi necroses are fully developed which correlates with the maximum of salicylic acid increase in virus inoculated leaves. Keywords: Direct comparison

2008-02-13 | GSE10488 | GEO

Potato virus Y HCPro suppression of antiviral silencing in Nicotiana benthamiana plants correlates with its ability to bind in vivo to small RNAs of 21 and 22 nucleotides in length of viral sequence

Project description:We have investigated short and small RNAs (sRNAs) that were bound to a biologically active hexahistidine-tagged Potato virus Y (PVY) HCPro suppressor of silencing, expressed from a heterologous virus vector in Nicotiana benthamiana plants, and purified under non-denaturing conditions. We found that RNAs in purified preparations were differentially enriched in sRNAs of 21 and to a much lesser extent of 22 nucleotides (nt) in length and of viral sequence (vsRNAs) when compared to those found in a control plant protein background bound to the nickel resin in the absence of HCPro, or in a purified alanine substitution HCPro mutant (HCPro mutB) control that lacked suppressor of silencing activity. In both controls, sRNAs were composed almost entirely by molecules of plant sequence, indicating that the resin-bound protein background had no affinity for vsRNAs, and also that HCPro mutB failed to bind to vsRNAs. Therefore, PVY HCPro suppressor activity correlated with its ability to bind to 21 and 22 nt vsRNAs. HCPro constituted at least 54 % of the total protein content in purified preparations and we were able to calculate its contribution to the 21 and the 22 nt pool of sRNAs present in the purified samples and its binding strength relative to the background. We also found that in the 21 nt vsRNAs of the HCPro preparation 5´ terminal adenines were overrepresented relative to the controls, but not in vsRNAs of other sizes or of plant sequence.

2017-03-31 | GSE71921 | GEO

potyvirus-Transcriptional analysis of Arabidopsis thaliana infected by a potyvirus.

Project description:ra03-02_potyvirus - potyvirus - Identification of genes involved in plant/virus interactions. - In this experiment, Arabidopsis plants infected by a virus, Tobacco etch virus (TEV), a potyvirus, were compared with healthy plants to identify genes for which the expression is modified by the viral infection. Analysis of both inoculated leaves and upper young leaves were performed 7 days after the inoculation with the virus (or with only buffer for the healthy plants). Keywords: normal vs disease comparison

2007-08-31 | GSE8875 | GEO

Transcriptome sequencing from Nicotiana benthamiana leaves non-infected and infected with Turnip mosaic virus (TuMV)

Project description:Transcriptome sequencing from Nicotiana benthamiana leaves non-infected and infected with Turnip mosaic virus at 6 days post inoculation.

2021-02-25 | GSE167415 | GEO

Transcription profiling of Diploid potato plants expressing non-necrotic resistance (nnr) or susceptible (S) to Potato virus A (PVA) inoculated with PVA and samples from the inoculated leaves were collected 0h, 6h, 9h, 12h, 24h and 48h post-inoculation

Project description:Diploid potato plants expressing non-necrotic resistance (nnr) or which were susceptible (S) to Potato virus A (PVA) were inoculated with PVA and samples from the inoculated leaves were collected 0h, 6h, 9h, 12h, 24h and 48h post-inoculation. Control plants were mock-inoculated. The comparisons on the microarrays were made nnr vs. S and nnr vs. nnr-mock. Abbreviations: R = resistant (same as ra and nnr), RM = resistant-mock, S = susceptible, A, B and C are three independent experiments.

2006-03-23 | E-MEXP-290 | biostudies-arrayexpress

LC-MSMS of RIBOPROTEOMES OF HEALTHY, POTATO VIRUS A- AND AGROBACTERIUM -INFECTED NICOTIANA BENTHAMIANA PLANTS

Project description:Nicotiana benthamiana is an important model plant for plant-microbe interaction studies. We compared the proteomes of ribosomes purified from healthy N. benthamiana plants and plants that were infected with two plant pathogens potato virus A (PVA genus Potyvirus) and A. tumefaciens bacteria. Ribosomes were affinity purified from transgenic leaves that expressed FLAG-tagged RPL18B (RPL: ribosome protein large subunit) of A. thaliana. Control purifications were made from non-transgenic plants that were infected with PVA. Our riboproteome revealed ~6600 r-protein hits representing 424 distinct r-proteins that were members from 71 of the expected 81 r-protein families.

2018-12-05 | PXD011602 | Pride

Effect of two potato viruses, PLRV and PVY, on potato gene expression in Russet Burbank

Project description:Potato plants (cv. Russet Burbank) were grown as in vitro plantlets, and transplanted into 12-cm pots in Sunshine Mix #2 (peat/perlite mix) supplemented with slow release fertilizer (Osmocoat) in the greenhouse. The experiment was conducted in the summer of 2004 at Moscow, ID. Plantings were staggered to facilitate collection of volatiles and leaf samples during a short harvest window for all times of all treatments. Infectious Green Peach Aphids were raised on PLRV-infected potato plants; test plants were infected by placing 10 infectious aphids on a leaf in a clip cage for 48 h. The control plants for PLRV were similarly treated with aphids that had been raised on uninfected potato plants. A local isolate of PVYO was inoculated mechanically using purified virus (5 ìg ml-1) in buffer (50 mM Na2HPO4, 20 mM Na2SO3 pH 7.0) lightly rubbed onto a leaf previously dusted with carborundum. Control plants for PVY were treated in the same manner using buffer without PVY. The RNA samples were made from systemically affected leaves, excluding the actual leaves inoculated by aphids or that received the mechanical infection. Leaf volatiles were concurrently collected from equivalent plants; aliquots of frozen leaf samples were sent for metabolite analysis prior to RNA extraction. Leaf harvests were made 1, 3, 7, 14, and 28 d post-inoculation. Keywords: Direct comparison

2007-09-01 | GSE8213 | GEO

Effects and role(s) of the noncoding subgenomic RNA of red clover necrotic mosaic virus in virus infection

Project description:In recent years, a new class of viral noncoding subgenomic (ncsg)RNA has been identified that is generated as a stable degradation product formed via an exonuclease-resistant (xr) RNA structure that blocks the progression of 5’-3’ exonuclease that degrades viral RNAs in infected cells. The xrRNA-derived ncsgRNAs have been implicated in virus pathogenicity, virus movement and transmission, and suppressing antiviral defense responses. Although ncsgRNAs of animal viruses have been studied extensively, research on the role of xrRNA-derived plant viral ncsgRNAs remain scarce. In this study, we assess the effects of the ncsgRNA of red clover necrotic mosaic virus (RCNMV), called SR1f, in infected plants. We demonstrate that the presence of SR1f leads to severe symptoms and increased viral RNA accumulation in Nicotiana benthamiana and Arabidopsis thaliana. We also provide evidence that suppression of RNA silencing is not the primary function of SR1f. Additionally, a comparative transcriptomic analysis in N. benthamiana infected with wildtype RCNMV and an SR1f-deficient mutant RCNMV reveal that wt RCNMV infection that produces SR1f has a greater and significant impact on cellular gene expression resulting in deregulation of several cellular pathways with upregulation of genes mainly involved in plant hormone signaling, plant-pathogen interaction, MAPK signaling, and several metabolic pathways and downregulation of genes involved mainly in photosynthesis.

2021-06-26 | GSE178909 | GEO

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