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North American Grapevine Yellows Phytoplasma

ABSTRACT: A 'Candidatus Phytoplasma pruni'-related strain associated with North American Grapevine Yellows Metagenomic assembly

PROVIDER: PRJNA1090061 | ENA |

REPOSITORIES: ENA

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			Action	DRS
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	SRR28398519_1.fastq.gz	Fastqsanger.gz
	SRR28398519_2.fastq.gz	Fastqsanger.gz

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Grapevine comparative early transcriptome profiling reveals that Flavescence dorée phytoplasma represses plant responses induced by vector feeding in susceptible varieties

Project description:Flavescence dorée is the most serious grapevine yellows disease in Europe. It is caused by phytoplasmas which are transmitted from grapevine to grapevine by the leafhopper Scaphoideus titanus. Differences in susceptibility among grapevine varieties suggest the existence of specific genetic features associated with resistance to the phytoplasma and/or possibly with its vector. In this work, RNA-Seq was used to compare early transcriptional changes occurring during the three-trophic interaction between the phytoplasma, its vector and the grapevine, represented by two different cultivars, one very susceptible to the disease and the other scarcely susceptible. Background: Flavescence dorée is the most serious grapevine yellows disease in Europe. It is caused by phytoplasmas which are transmitted from grapevine to grapevine by the leafhopper Scaphoideus titanus. Differences in susceptibility among grapevine varieties suggest the existence of specific genetic features associated with resistance to the phytoplasma and/or possibly with its vector. In this work, RNA-Seq was used to compare early transcriptional changes occurring during the three-trophic interaction between the phytoplasma, its vector and the grapevine, represented by two different cultivars, one very susceptible to the disease and the other scarcely susceptible. The comparison of the transcriptomic responses highlighted both passive and active defense mechanisms against the vector and/or the pathogen in the scarcely-susceptible variety, as well as the capacity of the phytoplasmas to repress the defense reaction against the insect in the susceptible variety.

2019-06-13 | E-MTAB-7710 | biostudies-arrayexpress

Aster yellows phytoplasma

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Project description:Aster yellows phytoplasma strain Hyd35 (16SrI-B) in micropropagated periwinkle shoots in collection was used to produce infected plants in pots that were separated according to the diverse symptomatology i.e. phyllody and witches’ broom. Small RNA high-throughput sequencing (HTS) was then used to determine the small RNA pattern of these plants. Bioinformatics analysis revealed the presence of expression changes of different miRNA classes and the presence of phytoplasma derived small RNAs. These results could complement previous studies and serve as a starting point for small RNA omics in phytoplasma research

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'Bois noir' phytoplasma induces significant reprogramming of the leaf transcriptome in the field grown grapevine

Project description:Transcriptional profiling of Vitis vinifera cv. Chardonnay healthy vs. Phytoplasma-infected plants (Bois noir phytoplasma). Study was conducted on grapevine plants grown in the same vineyard (leaf midribs were sampled). Keywords: disease state analysis Two-condition experiment: healthy vs. infected plants/shoots. Biological replicates: 4 healthy, 4 infected. No replicates. Each sample was prepared as a pool of several samples (each sample was collected from a different shoots/plants) of the same disease status. Each sample was co-hybridized to a common reference cRNA (pool of all samples).

2010-05-25 | E-GEOD-10906 | biostudies-arrayexpress

Strawberry lethal yellows phytoplasma (CPA) str. NZSb11

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A microarray analysis highlights the role of tetrapyrrole pathways in grapevine responses to stolbur phytoplasma, phloem virus infections and recovered status

Project description:Several systemic diseases affect Vitis vinifera worldwide with important consequent management costs. Phytoplasma and viruses represent the most detrimental pathogens inducing symptoms and metabolic alterations that modify quantitatively the crop production. In the aim to investigate the plant/pathogen interactions, different grapevine samples, naturally affected (in mixed or single infections) by Stolbur phytoplasma (agent of Bois Noir disease) and viruses, in comparison to healthy and recovered controls, to identify the plant response to systemic pathogen infection. The preliminary results showed that expression levels of thousands of genes were altered in infected plants, involving various metabolic pathways.

2016-02-19 | GSE52540 | GEO

Jikradia olitoria ([Hemiptera]:[Cicadellidae]) Transmits the Sequevar NAGYIIIβ Phytoplasma Strain Associated with North American Grapevine Yellows in Artificial Feeding Assays.

Project description:North American Grapevine Yellows (NAGY) is a destructive disease of grapevines caused by phytoplasmas, wall-less bacteria that are insect-transmitted and found in plant phloem tissues. Although the disease was recognized in vineyards in the eastern United States since the 1980s, the identities of vectors remain unknown. The objectives of this study were to survey potential phytoplasma vector insects inhabiting Virginia vineyards that expressed NAGY symptoms and to evaluate their ability to transmit phytoplasmas associated with NAGY. Phytoplasmas were identified as 'Candidatus Phytoplasma pruni'-related NAGYIIIβ strains and 'Ca. Phytoplasma asteris'-related NAGYI-B strains. To determine the identities of the potential vectors, artificial feeding solution was used to evaluate the ability of leafhopper species to release phytoplasmas during feeding and phytoplasma strains were identified using molecular tools. Out of 49 insect species screened, Jikradia olitoria was the only insect that released phytoplasmas into the feeding solutions; all phytoplasmas, thus, detected were identified as NAGYIIIβ strains by nucleotide sequencing of three different genomic regions. No NAGYI-B strain was detected. To our knowledge, this is the first evidence of a potential insect vector of a specific phytoplasma associated with NAGY disease, and it is the first report of J. olitoria being a putative vector of a plant pathogenic phytoplasma.

| S-EPMC6314332 | biostudies-literature

New Jersey aster yellows phytoplasma strain:NJAY

Project description:New Jersey aster yellows phytoplasma strain:NJAY Genome sequencing and assembly

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