A four-partner plant–virus interaction: enemies can also come from within
Marie-Line Iskra-Caruana1, Franc-Christophe Baurens, Philippe Gayral
1CIRAD, UMR BGPI, F-34398 Montpellier, France. marie-line.caruana@cirad.fr
Molecular Plant-Microbe Interactions : MPMI
|October 7, 2010
Summary
Endogenous pararetroviruses (EPRVs) integrate into plant genomes, becoming infectious and causing disease outbreaks. This review details the Banana streak virus (BSV)-banana interaction, highlighting its unique four-partner pathosystem.
Area of Science:
- Plant virology
- Genetics
- Molecular biology
Background:
- Plant viruses spread via vertical or horizontal transmission.
- Plant pararetroviruses (Caulimoviridae family) can integrate into host genomes.
- Integrated endogenous pararetrovirus (EPRV) sequences can rearrange and reactivate.
Purpose of the Study:
- To review the unique four-partner interaction in the Banana streak virus (BSV)-banana pathosystem.
- To highlight the role of endogenous BSV in disease epidemiology and banana breeding.
Main Methods:
- Literature review focusing on endogenous pararetroviruses and BSV-banana interactions.
- Analysis of viral genome integration, rearrangement, and reactivation mechanisms.
- Examination of pathosystem dynamics including host-virus-vector interactions.
Main Results:
- EPRVs, including BSV, can integrate into plant genomes and spontaneously reactivate.
- Integrated BSV contributes to banana streak disease outbreaks and impacts breeding.
- The BSV-banana pathosystem represents a rare four-partner interaction (virus, host, endogenous virus, vector).
Conclusions:
- Endogenous pararetroviruses pose a significant threat to crop health and breeding programs.
- Understanding the BSV-banana interaction provides insights into viral genome dynamics and plant disease.
- The study emphasizes the importance of considering endogenous viral elements in plant pathology.
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