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Grapevine virusA-mediated gene silencing in Nicotiana benthamiana and Vitis vinifera.

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Virus-induced gene silencing (VIGS) is an attractive approach for studying gene function. Although the number of virus vectors available for use in VIGS experiments has increased in recent years, most of these vectors are applied in annual or herbaceous plants. The aim of this work was to develop a

The Effect of Transcription Factor MYB14 on Defense Mechanisms in Vitis quinquangularis-Pingyi.

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In the current study, we identified a transcription factor, MYB14, from Chinese wild grape, Vitis quinquangularis-Pingyi (V. quinquangularis-PY), which could enhance the main stilbene contents and expression of stilbene biosynthesis genes (StSy/RS) by

Characterization of Vitis vinifera NPR1 homologs involved in the regulation of pathogenesis-related gene expression.

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BACKGROUND Grapevine protection against diseases needs alternative strategies to the use of phytochemicals, implying a thorough knowledge of innate defense mechanisms. However, signalling pathways and regulatory elements leading to induction of defense responses have yet to be characterized in this

In planta and in silico characterization of five sesquiterpene synthases from Vitis vinifera (cv. Shiraz) berries.

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UNASSIGNED Five Vitis vinifera sesquiterpene synthases were characterized, two was previously uncharacterized, one being a caryophyllene/cubebene synthase and the other a cadinene synthase. Residue differences with other Vitis sesquiterpene synthases are described. The biochemical composition of

Molecular Characterization and Overexpression of VpRPW8s from Vitis pseudoreticulata Enhances Resistance to Phytophthora capsici in Nicotiana benthamiana.

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RPW8 genes are atypical broad-spectrum genes that provide resistance to powdery mildew, downy mildew, the cauliflower mosaic virus in Arabidopsis thaliana, and powdery mildew in tobacco. They play important roles in basal plant pathogen defense. They also provide insights into a novel disease

Molecular characterization of VvSDIR1 from Vitis vinifera and its functional analysis by heterologous expression in Nicotiana tabacum.

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The proteins harboring really interesting new gene (RING) finger domains comprise a large family and play key roles in a variety of cellular processes. One among them is the tolerance to biotic and abiotic stresses in plants. In the present study, we characterize Vitis vinifera salt- and

The presence and characterization of a virF gene on Agrobacterium vitis Ti plasmids.

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Octopine and nopaline strains of Agrobacterium tumefaciens differ in their ability to induce tumors on Nicotiana glauca. The presence of a virF locus on the octopine Ti plasmid makes N. glauca a host plant for these strains, indicating that the VirF protein is a host-range determinant. Here we show

Analysis of transgenic grapevine (Vitis rupestris) and Nicotiana benthamiana plants expressing an Arabis mosaic virus coat protein gene.

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A disarmed LBA4404 strain of Agrobacterium tumefaciens harboring a binary vector which contained chimeric genes encoding the neomycin phosphotransferase (npt II) and the coat protein (CP) of Arabis mosaic nepovirus (ArMV) was used in co-cultivation experiments with leaf discs of Nicotiana

Synthesis of an artificial Vitis vinifera miRNA 319e using overlapping long primers and its application for gene silencing.

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The conserved mechanism of action of micro-RNAs (miRNAs) as regulators of gene expression has allowed the use of artificial miRNAs (amiRNAs) as a powerful tool for candidate gene evaluation in plants. Based on the use of a Vitis vinifera miRNA molecule (i.e., vvi-miR319e), the present work presents

A Vitis vinifera basic helix-loop-helix transcription factor enhances plant cell size, vegetative biomass and reproductive yield.

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Strategies for improving plant size are critical targets for plant biotechnology to increase vegetative biomass or reproductive yield. To improve biomass production, a codon-optimized helix-loop-helix transcription factor (VvCEB1opt ) from wine grape was overexpressed in Arabidopsis thaliana

Transformation of vitis tissue by different strains of Agrobacterium tumefaciens containing the T-6b gene.

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Stem pieces and leaf disks of Vitis spp. were cocultured with Agrobacterium tumefaciens strains carrying the UidA (ß-glucuronidase = GUS) gene. The transformation efficiency was highly increased by using a modified T-6b gene (a gene from pTiTm4) which interferes with normal growth and allows

Ectopic expression of a Ve homolog VvVe gene from Vitis vinifera enhances defense response to Verticillium dahliae infection in tobacco.

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Verticillium wilt is a soil borne disease that can cause devastating losses to the production of many economically important crops. A Ve1 homologous gene responding to Verticillium dahliae infection was identified in Vitis vinifera cv. "HeiFeng" by semi-quantitative reverse transcription polymerase

Co-expression of VpROMT gene from Chinese wild Vitis pseudoreticulata with VpSTS in tobacco plants and its effects on the accumulation of pterostilbene.

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Plant secondary metabolites, such as stilbenes, have fungicidal potential and have been found in several plant species. Stilbenes in grapevine, such as resveratrol and pterostilbene, have recently attracted much attention, they are not only helping the plant to fight against pathogen attack, but

Isolation by improved thermal asymmetric interlaced PCR and characterization of a seed-specific 2S albumin gene and its promoter from grape (Vitis vinifera L.).

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A seed-specific 2S albumin gene and its promoter region of grape (Vitis vinifera L.) were isolated using an improved thermal asymmetric interlaced PCR that allowed efficient amplification of target sequence of up to 3 kbp in length directly from genomic DNA. The 2S albumin VvAlb1 (for V. vinifera 2S

LtEPG1, a secretory endopolygalacturonase protein, regulates the virulence of Lasiodiplodia theobromae in Vitis vinifera and is recognized as an MAMP

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The Lasiodiplodia theobromae genome encodes numerous glycoside hydrolases involved in organic matter degradation and conducive to pathogen infection, whereas their molecular mechanisms are still largely unknown. Here, we identified the glycoside hydrolase family 28 endopolygalacturonase

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