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First report of Erysiphe magnifica on Magnolia trees in Romania

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Abstract

In Europe, Magnolia species are planted as ornamental trees in public and private green spaces. Over the last four years, from 2018 to 2021, powdery mildew symptoms have been observed on magnolia trees in several localities in north-east, west, and south Romania. The fungus was detected mainly on leaves, causing, in early stages, whitish patches on both leaf sides and later, leaf discoloration, necrosis, and distortion. Combining morphological features with analysis of ITS-rDNA sequences from Romanian samples and sequences available on GenBank, the pathogen causing the powdery mildew of magnolias was identified as Erysiphe magnifica (U. Braun) U. Braun & S. Takam., a species recently introduced to Europe and present only in a few countries. Our finding is the first report of E. magnifica in Romania, bringing new evidence for its geographic expansion. No other species of Erysiphales has been reported from Romania on magnolias.

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Availability of data and materials

Sequence data that support the findings of this study have been deposited in GenBank (https://www.ncbi.nlm.nih.gov/genbank/) with the accession numbers OP117374 to OP117377. The samples (voucher specimens I 186557 to I 186569) that support the findings of this study are available on request from the Herbarium of Alexandru Ioan Cuza University of Iași, Romania (Index Herbariorum acronym: I).

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Acknowledgements

We are grateful to David A Hewitt for the English language revision. We also thank the two anonymous reviewers for their helpful comments that improved the manuscript.

Funding

The authors have no relevant financial or non-financial interests to disclose. All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript. The authors have no financial or proprietary interests in any material discussed in this article.

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Authors and Affiliations

  1. Faculty of Biology, Alexandru Ioan Cuza University of Iași, Iași, Romania

    Vasilică-Claudiu Chinan

  2. CERNESIM (Integrated Center of Environmental Science Studies in the North East Region), Institute of Interdisciplinary Research, Alexandru Ioan Cuza University of Iași, Iași, Romania

    Maria-Magdalena Dascălu

Authors
  1. Vasilică-Claudiu Chinan
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  2. Maria-Magdalena Dascălu
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Contributions

Vasilică-Claudiu Chinan contributed to the study conception and design. Material preparation and data collection were performed by Vasilică-Claudiu Chinan. Molecular analysis and microscope images were performed by Maria-Magdalena Dascălu. The manuscript was written by Vasilică-Claudiu Chinan and Maria-Magdalena Dascălu.

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Correspondence to Vasilică-Claudiu Chinan.

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Chinan, VC., Dascălu, MM. First report of Erysiphe magnifica on Magnolia trees in Romania. J Plant Dis Prot 130, 657–661 (2023). https://doi.org/10.1007/s41348-023-00721-z

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