Natural cross-kingdom transmission of a novel ssDNA mycovirus confers broad-spectrum resistance to plant diseases

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ID: 319346
2026
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Ranked #205 of 673 articles by views in Plant physiology and biochemistry : PPB

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Abstract
Cross-kingdom virus transmission between plants and fungi remains rare in nature. Here, a novel circular ssDNA virus, Diaporthe pseudophoenicicola DNA virus 1 (DpDV1), was identified from the phytopathogenic fungus Diaporthe pseudophoenicicola. DpDV1 attenuates the pathogenicity of both its original and experimental host fungi, demonstrating its potential as a biocontrol agent against fungal phytopathogens. Remarkably, DpDV1 displays bidirectional plant-fungal transmission capability without inducing observable phenotypic changes in plant hosts, overcoming the limitations imposed by vegetative incompatibility in conventional hypovirulence-based biocontrol approaches. Immunocytochemical localization assays revealed DpDV1 is localized in the chloroplasts of plant cells, demonstrating its cross-kingdom transmission. Furthermore, we demonstrated DpDV1 can cross-protect plants against plant viruses, establishing foundations for cross-protection-based management of plant virus diseases. Hence, we report a novel ssDNA mycovirus and provide evidence of mycovirus cross-kingdom transmission between plant and fungi, providing innovative strategies for mycovirus biocontrol of plant fungal and viral diseases.
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Authors Siyu Zhou, Yuanhao Sun, Peng Li, Xuetuan Lin, Xiaofei Liang, Jie Zhou, Jiǎtāo Xiè, Li Zheng
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Journal Plant physiology and biochemistry : PPB
Year 2026
DOI
10.1093/plphys/kiag464
URL
https://doi.org/10.1093/plphys/kiag464
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