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Disease Reports and Disease Diagnostics / Rapports des Maladies

Erysiphe thuemenii causing powdery mildew on Potentilla indica in China

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Pages 446-450 | Accepted 22 Aug 2023, Published online: 02 Oct 2023
 

Abstract

In August 2017, severe powdery mildew was observed on Potentilla indica in Minhe, Qinghai province, China. The identification of fungal species was performed by morphological study using an optical microscope and scanning electron microscope (SEM), supplemented by sequence analysis of the internal transcribed spacer (ITS) region of rDNA. Based on a combination of morphology, ITS sequence, and host, the powdery mildew on Potentilla indica was identified as Erysiphe thuemenii, a species belonging to the E. aquilegiae complex. This is the first report of E. thuemenii causing powdery mildew on a new host species, P. indica, in China and also worldwide.

Résumé

En août 2017, de graves cas de blanc ont été observés sur Potentilla indica à Minhe, dans la province du Qinghai, en Chine. L’identification de l’espèce fongique a découlé d’une étude morphologique par microscopie optique et microscopie électronique à balayage, complétée par l’analyse des séquences de la région de l’espaceur transcrit interne (ITS) de l’ADNr. En se basant sur la morphologie, la séquence ITS et l’hôte, le blanc trouvé sur P. indica a été identifié en tant que Erysiphe thuemenii, une espèce appartenant au complexe E. aquilegiae. Il s’agit de la première mention d’E. thuemenii causant le blanc sur une nouvelle espèce d’hôtes, P. indica, en Chine et ailleurs dans le monde.

Acknowledgments

This paper was supported by the Qinghai Province Innovation Platform Construction Project (2023-ZJ-T01). We wish to thank Prof. Uwe Braun (Institute of Biology, Herbarium, Martin Luther University, Germany) for valuable suggestions.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the the Qinghai Province Innovation Platform Construction Project [2023-ZJ-T01].

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