Abstract
‘Shine Muscat’ grapevines occasionally develop leaf malformations with chlorosis, vein clearing, and dwarfing. Grapevine fabavirus, grapevine geminivirus A, hop stunt viroid, and grapevine yellow speckle viroid 1 were detected in all six mother vines examined using next-generation sequencing and reverse transcription–polymerase chain reaction analyses, but 5 of 15 mother vine progenitors had no detectable viral pathogens. At 24 °C, leaf malformations were severe, and even clones of viral pathogen-negative vines had leaf malformations; the causes remain unclear. Infection with viral pathogens via graft inoculation from the mother vine caused severe dwarfing and severe leaf malformations.
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Acknowledgements
We are grateful to Drs. N. Mase and Y. Sato for heat therapy and shoot-tip culture and to Dr. R. Nakaune for useful advice. This study was funded by NARO.
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All the authors belong to NARO. The authors have full control of all primary data and agree to allow the journal to review the data if requested. The authors declare that they have no conflict of interest.
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The experiments complied with the current laws of Japan. This article does not contain any studies with human participants or animals performed by any of the authors.
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The nucleotide sequence data reported here are available in the DDBJ/EMBL/GenBank databases under accession numbers LC424098, LC457511, and LC457512.
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Chiaki, Y., Ito, T., Sato, A. et al. Dwarfing caused by viral pathogens and leaf malformations in ‘Shine Muscat’ grapevine. J Gen Plant Pathol 86, 34–38 (2020). https://doi.org/10.1007/s10327-019-00888-0
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DOI: https://doi.org/10.1007/s10327-019-00888-0