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Detection of Phytophthora capsici in Irrigation Water using Loop-Mediated Isothermal Amplification

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Published on: June 25, 2020

Phytophthora viruses.

Guohong Cai¹, Bradley I Hillman

¹Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ, USA. cai@aesop.rutgers.edu

Advances in Virus Research

|March 19, 2013

Summary

Viruses infecting Phytophthora species, including Phytophthora infestans, have been identified. These discoveries reveal novel virus families and genera, expanding our understanding of oomycete virology.

Area of Science:

Oomycete virology
Phytopathology
Molecular biology

Background:

Phytophthora species are oomycetes, morphologically similar to fungi but phylogenetically related to algae.
Several viruses have recently been characterized in Phytophthora, including those from Phytophthora infestans, a significant plant pathogen.

Purpose of the Study:

To characterize newly identified viruses within Phytophthora species.
To understand the phylogenetic relationships and potential impact of these viruses.

Main Methods:

Viral genome sequencing and characterization.
Phylogenetic analysis to determine viral classification.
Comparative genomics to understand viral organization.

Main Results:

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Four novel viruses were identified in Phytophthora infestans (PiRV-1 to PiRV-4) and an endornavirus in another Phytophthora species (PEV1).
PiRV-1 and PiRV-2 represent potential new virus families, PiRV-3 suggests a new genus, and PiRV-4 belongs to the Narnaviridae family.
PEV1 was the first non-plant endornavirus reported. No viral capsids were observed for these viruses.
PiRV-1 exhibits unique genome organization, and PiRV-2 may be linked to past outbreaks of late blight.

Conclusions:

The study expands the known diversity of viruses infecting oomycetes.
These findings necessitate the establishment of new viral taxa and highlight unique viral characteristics.
Further research is needed to fully elucidate the genome organization and ecological roles of these Phytophthora viruses.