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Geminiviruses: masters at redirecting and reprogramming plant processes

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TLDR
This Review describes the current knowledge of how geminiviruses interact with their plant hosts and the functional consequences of these interactions.
Abstract
The family Geminiviridae is one of the largest and most important families of plant viruses. The small, single-stranded DNA genomes of geminiviruses encode 5-7 proteins that redirect host machineries and processes to establish a productive infection. These interactions reprogramme plant cell cycle and transcriptional controls, inhibit cell death pathways, interfere with cell signalling and protein turnover, and suppress defence pathways. This Review describes our current knowledge of how geminiviruses interact with their plant hosts and the functional consequences of these interactions.

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Citations
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Journal ArticleDOI

A peptidoglycan recognition protein acts in whitefly (Bemisia tabaci) immunity and involves in Begomovirus acquisition.

TL;DR: A P GRP gene, BtPGRP, encodes a PGRP from the whitefly Bemisia tabaci (MEAM1) that binds and kills bacteria in vitro, and provides insight into how the white fly immunity acts in complex mechanisms of Begomovirus transmission among plants.
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V2 from a curtovirus is a suppressor of post-transcriptional gene silencing.

TL;DR: It is shown here that, despite the lack of sequence homology with its begomoviral counterpart, BCTV V2 acts as a potent PTGS suppressor, possibly by impairing the RDR6 (RNA-dependent RNA polymerase 6)/suppressor of gene silencing 3 (SGS3) pathway.
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Tomato yellow leaf curl virus: No evidence for replication in the insect vector Bemisia tabaci.

TL;DR: Time-course experiments to quantify complementary and virion sense viral nucleic acid accumulation within B. tabaci using a recently implemented two step qPCR procedure revealed that viral DNA quantities did not increase for time points up to 96 hours after acquisition of the virus.
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Differential response of cassava genotypes to infection by cassava mosaic geminiviruses

TL;DR: Cassava genotypes respond differently to infection by cassava mosaic geminiviruses, and VsRNAs heterogeneously map the entire virus genome in both polarities.
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Biological characterization of Tomato leaf curl New Delhi virus from Spain

TL;DR: New full-length sequences from zucchini squash and tomato indicated a high genetic homogeneity (>99% sequence identity) in the ToLCNDV populations in Spain, pointing to a single recent introduction event.
References
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Journal ArticleDOI

Top 10 plant viruses in molecular plant pathology

TL;DR: A short review on each virus of the Top 10 list and its importance is presented, with the intent of initiating discussion and debate amongst the plant virology community, as well as laying down a benchmark, as it will be interesting to see in future years how perceptions change and which viruses enter and leave the Top10.
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Geminiviruses: Models for Plant DNA Replication, Transcription, and Cell Cycle Regulation

TL;DR: The goal of this review is to summarize recent research addressing geminivirus DNA replication and its integration with transcriptional and cell cycle regulatory processes.
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Emerging Virus Diseases Transmitted by Whiteflies

TL;DR: Factors driving the emergence and establishment of whitefly-transmitted diseases include genetic changes in the virus through mutation and recombination, changes inThe vector populations coupled with polyphagy of the main vector, Bemisia tabaci, and long distance traffic of plant material or vector insects due to trade of vegetables and ornamental plants.
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Exploiting chinks in the plant's armor: evolution and emergence of geminiviruses

TL;DR: The geminiviruses represent a family of DNA viruses that has circumvented these impediments to emerge as one of the most successful viral pathogens, causing severe economic losses to agricultural production worldwide.
Journal ArticleDOI

Global analysis of Arabidopsis gene expression uncovers a complex array of changes impacting pathogen response and cell cycle during geminivirus infection

TL;DR: Geminiviruses modulate plant cell cycle status by differentially impacting the CYCD/retinoblastoma-related protein/E2F regulatory network and facilitating progression into the endocycle.
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