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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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Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
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Introduction to Virus01:28

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Viruses are unique biological entities that blur the boundary between living and non-living systems. Although they lack cellular structure and metabolic processes, they can exhibit characteristics of life when infecting a host. Their defining feature is a nucleic acid core, composed of either DNA or RNA, encapsulated within a protein coat called a capsid. This simple structure allows them to invade host cells and use their machinery for replication efficiently.Viral Structure and...
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Viruses with RNA Genomes01:29

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RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
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What are Viruses?00:50

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Related Experiment Video

Updated: Jul 27, 2025

Combining Analysis of DNA in a Crude Virion Extraction with the Analysis of RNA from Infected Leaves to Discover New Virus Genomes
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Combining Analysis of DNA in a Crude Virion Extraction with the Analysis of RNA from Infected Leaves to Discover New Virus Genomes

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Plant virology.

César A D Xavier1, Anna E Whitfield2

  • 1Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27606, USA.

Current Biology : CB
|June 6, 2023
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Summary
This summary is machine-generated.

Plant viruses, like tobacco mosaic virus, are key to understanding plant biology and virology. New research reveals complex plant-virus interactions, from pathogenic to symbiotic, involving vectors and plant defenses.

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Area of Science:

  • Plant virology
  • Plant biology
  • Microbial ecology

Background:

  • The first identified virus, tobacco mosaic virus (1898), initiated plant virus studies.
  • Research traditionally focused on pathogenic viruses affecting food crops.
  • Emerging research explores the broader plant virome, including symbiotic interactions.

Purpose of the Study:

  • To provide a primer on plant-virus interactions.
  • To highlight the complexity of plant-associated microbial communities.
  • To discuss viral transmission, plant defenses, and movement.

Main Methods:

  • Literature review and synthesis of current research in plant virology.
  • Analysis of viral interactions with hosts, vectors, and microbial communities.
  • Examination of plant antiviral responses and viral strategies.

Main Results:

  • Plant viruses exist within complex microbial communities, not in isolation.
  • Viruses manipulate plant chemistry and defenses to attract and utilize vectors for transmission.
  • Antiviral plant defenses, including resistance genes, are crucial in controlling virus spread.

Conclusions:

  • Plant-virus interactions are diverse, ranging from pathogenic to symbiotic.
  • Understanding these interactions is vital for plant health and agricultural productivity.
  • Further research into the plant virome promises new discoveries in virology and plant biology.