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Canker Development and Biocontrol Potential of CHV-1 Infected English Isolates of ICryphonectria parasitica/I Is Dependent on the Virus Concentration and the Compatibility of the Fungal Inoculums
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Canker Development and Biocontrol Potential of CHV-1 Infected English Isolates of ICryphonectria parasitica/I Is Dependent on the Virus Concentration and the Compatibility of the Fungal Inoculums
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Canker Development and Biocontrol Potential of CHV-1 Infected English Isolates of ICryphonectria parasitica/I Is Dependent on the Virus Concentration and the Compatibility of the Fungal Inoculums
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Journal Article
Canker Development and Biocontrol Potential of CHV-1 Infected English Isolates of ICryphonectria parasitica/I Is Dependent on the Virus Concentration and the Compatibility of the Fungal Inoculums
2022
Overview
Biological control of Cryphonectria parasitica fungus, causal agent of chestnut blight, by virus infection (hypovirulence) has been shown to be an effective control strategy against chestnut blight in Europe and some parts of North America. The most studied mycovirus is the Cryphonectria hypovirus 1 (CHV-1) type species of the Hypoviridae family. To efficiently provide biocontrol, the virus must be able to induce hypovirulence in its fungal host in chestnut trees. Here, two different CHV-1 subtype I virus strains (E-5 and L-18), gained by transmissions, were tested for their hypovirulence induction, biocontrol potential, and transmission between vegetatively compatible (VCG) and incompatible fungal isolate groups in sweet chestnut seedlings and branches. Both strains of CHV-1 showed great biocontrol potential and could protect trees by efficiently transmitting CHV-1 by hyphal anastomosis between fungal isolates of the same VCG and converting virulent to hypovirulent cankers. The hypovirulent effect was positively correlated with the virus concentration, tested by four different reverse-transcription PCRs, two end-point and two real-time methods, one of which represents a newly developed real-time PCR for the detection and quantification of CHV-1.
Publisher
MDPI AG
Subject
