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Related Concept Videos

Subviral Agents01:29

Subviral Agents

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Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
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Related Experiment Video

Updated: Mar 28, 2026

Virus-induced Gene Silencing VIGS in Nicotiana benthamiana and Tomato
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Why Benthamiana Went Viral.

Marco Todesco1, Felipe F de Felippes2

  • 1Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.

Trends in Plant Science
|December 25, 2015
PubMed
Summary

Nicotiana benthamiana plants are susceptible to viruses, making them useful for research. New findings suggest these plants may have evolved to lose their antiviral defenses for specific reasons.

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Area of Science:

  • Plant science
  • Virology
  • Molecular biology

Background:

  • Nicotiana benthamiana is a widely used model organism in plant virology and molecular biology due to its susceptibility to viral infections.
  • Understanding the plant's immune responses is crucial for developing effective disease resistance strategies.

Purpose of the Study:

  • To investigate the potential reasons behind Nicotiana benthamiana's broad susceptibility to viral infections.
  • To explore the evolutionary implications of the plant's antiviral defense mechanisms.

Main Methods:

  • Comparative genomic analysis
  • Functional assays of antiviral genes
  • Viral challenge experiments in Nicotiana benthamiana

Main Results:

  • Evidence suggests that the loss of certain antiviral genes in Nicotiana benthamiana may confer a selective advantage.
  • Specific viral interactions might have driven the downregulation or loss of plant defense pathways.

Conclusions:

  • The susceptibility of Nicotiana benthamiana to viruses may not be a deficiency but a potentially adaptive trait.
  • Further research is needed to fully elucidate the trade-offs between defense and other fitness components in this model plant.