Impact of RNA Virus Infection on Plant Cell Function and Evolution

Viruses are obligate symbionts that tightly interact with their hosts to complete their life cycle. Each infected cell is confronted with the accumulation of viral products and activities that have evolved to support the replication and spread of the virus in the context of host cell functions and d...

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Bibliographic Details
Published in:Annals of the New York Academy of Sciences 2009-10, Vol.1178 (1), p.120-128
Main Authors: Niehl, Annette, Heinlein, Manfred
Format: Article
Language:English
Subjects:
Cellular Biology
cyanobacteria
endoplasmic reticulum
Evolution, Molecular
FtsZ
Genome, Viral
Life Sciences
microtubules
movement protein
non-cell-autonomous proteins
Plant Viral Movement Proteins - genetics
Plant Viral Movement Proteins - metabolism
plasmodesmata
RNA Interference
RNA silencing
RNA transport
RNA Viruses - genetics
RNA Viruses - pathogenicity
RNA, Viral - metabolism
silencing suppressor
small RNA
Tobacco mosaic virus
Tobacco Mosaic Virus - genetics
Tobacco Mosaic Virus - metabolism
Viral Proteins - genetics
Viral Proteins - metabolism
virus infection
Virus Replication
virus-triggered recombination
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Summary:Viruses are obligate symbionts that tightly interact with their hosts to complete their life cycle. Each infected cell is confronted with the accumulation of viral products and activities that have evolved to support the replication and spread of the virus in the context of host cell functions and defense responses. Tobacco mosaic virus encodes replicase proteins and coat protein, to replicate and protect the RNA genome, and a movement protein (MP) that binds viral RNA and manipulates the size exclusion limit of plasmodesmata to facilitate the spread of the viral genomic RNA (vRNA). The MP and replicase also interfere with the cellular RNA silencing machinery that influences plant gene expression and development. Moreover, virus‐infected cells stimulate the production of a systemic signal ahead of the virus front that triggers genomic recombination leading to heritable genetic changes. Thus viruses can interact with their hosts through diverse molecular interactions. Given the high mutation rate of viruses, these interactions have implications for evolutionary processes and adaptations at the virus‐host interface that may contribute to eukaryotic evolution.
ISSN:0077-8923
1749-6632
DOI:10.1111/j.1749-6632.2009.04996.x