Related Experiment Video
Updated: Dec 30, 2025
08:56
Combining Analysis of DNA in a Crude Virion Extraction with the Analysis of RNA from Infected Leaves to Discover New Virus Genomes
Published on: July 27, 2018
11.5K
ICTV Virus Taxonomy Profile: Chrysoviridae
Ioly Kotta-Loizou1, José R Castón2, Robert H A Coutts3
1Imperial College London, London, SW7 2AZ, UK.
The Journal of General Virology
|January 21, 2020
Summary
Chrysoviruses are non-enveloped viruses with segmented dsRNA genomes that infect fungi, plants, and insects. They spread through intracellular routes and lack extracellular phases, impacting fungal hosts by causing hypovirulence.
Area of Science:
- Virology
- Mycology
- Plant Pathology
Background:
- Chrysoviruses belong to the family Chrysoviridae, characterized by isometric, non-enveloped virions.
- These viruses possess segmented, linear, double-stranded RNA (dsRNA) genomes, with 3-7 individual genomic segments.
- Chrysoviruses are known to infect fungi, plants, and potentially insects, with implications for fungal hypovirulence.
Purpose of the Study:
- To summarize the International Committee on Taxonomy of Viruses (ICTV) report on the taxonomy of the family Chrysoviridae.
- To provide an overview of the key characteristics and biological properties of chrysoviruses.
Main Methods:
- This work is a summary of the official ICTV report.
- Information is compiled from existing taxonomic data and research on Chrysoviridae.
Main Results:
- Chrysoviruses are classified within the family Chrysoviridae.
- They feature segmented dsRNA genomes and infect diverse hosts.
- Transmission occurs via intracellular routes, including spores and hyphal anastomosis, with no known vectors or extracellular phase.
Conclusions:
- Chrysoviruses represent a distinct viral family with unique genomic and replication strategies.
- Their host range and potential to induce hypovirulence highlight their ecological significance.
- Understanding chrysovirus taxonomy is crucial for further research into their biology and impact.
Related Concept Videos
01:29Viruses of Archaea
391
Archaeal viruses play a crucial role in the ecosystems of extremophilic archaea, particularly those belonging to the phyla Euryarchaeota and Crenarchaeota. By shaping host evolution and facilitating gene transfer, these viruses influence microbial communities and contribute to genetic diversity in extreme environments. The archaea they infect thrive in acidic hot springs and hydrothermal vents characterized by high temperatures and low pH. Archaeal viruses exhibit remarkable structural...
391
01:29Viruses with RNA Genomes
635
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...
635
01:10Retrovirus Life Cycles
49.0K
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...
49.0K
02:33Retroviruses
14.5K
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
14.5K
00:50What are Viruses?
127.2K
Overview
127.2K
01:29Bacterial Phylum Chlamydiae
361
The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic...
361