Yeh Yu-Wei, Piepenbring Meike, Kirschner Roland
School of Forestry & Resource Conservation, National Taiwan University, Roosevelt Rd. Sec. 4 No. 1, Taipei City, Taiwan.
Mycology Research Group, Faculty of Biological Sciences, Goethe University Frankfurt Am Main, Biologicum, Max-Von-Laue-Straße 13, Frankfurt Am Main, Germany.
Bot Stud. 2025 Aug 25;66(1):26. doi: 10.1186/s40529-025-00471-1.
Powdery mildews (Erysiphaceae, Ascomycota) belong to the most important plant pathogenic fungi that cause stress to forest and fruit trees and lead to a considerable loss of economic crops worldwide as well as in Taiwan. The checklist of Erysiphaceae in Taiwan is an important basis to control these pathogens. However, it has been published 25 years ago without any updating, while taxonomic concepts of genera and species changed and many new fungus and host records have been published. We update the checklist of Erysiphaceae by applying new taxonomical concepts and we add several new host records worldwide or for Taiwan based on own, recent collections.
The updated checklist of powdery mildew in Taiwan is presented including data on 13 species of Erysiphaceae on 28 species of host plants. Doubtful records are marked as such and proposed for further investigation. For agricultural application, information on the usage of host plants was added to the checklist. Besides, over twenty specimens of Erysiphaceae on common plants in Taiwan recently collected by the authors were identified based on ITS sequences and anamorphic morphology. Among the collections, twelve represented new host records worldwide, while seventeen were new host records for Taiwan. Six species of Erysiphaceae were found in Taiwan for the first time.
The checklist of Erysiphaceae in Taiwan is an important basis for taxonomic and biogeographical studies as well as for quarantine sanctions referring to powdery mildews. Our results reveal that the host spectra of these pathogens are still incompletely known worldwide. Moreover, the list includes some doubtful old records that might be synonyms or wrong identifications. Morphological characteristics and ITS sequences are usually useful for the identification of Erysiphaceae. Several species in certain genera, however, cannot be distinguished since the variation in sequence data of those closely related species is quite low. New collections and re-investigation of old specimens are imperative to clarify some doubtful records.
白粉菌（白粉菌科，子囊菌门）属于最重要的植物病原真菌，对世界各地以及台湾的森林和果树造成胁迫，导致经济作物大量减产。台湾白粉菌科名录是防治这些病原菌的重要依据。然而，该名录于25年前发布，此后未作更新，而属和种的分类概念已经改变，并且已发表了许多新的真菌和寄主记录。我们应用新的分类概念更新了白粉菌科名录，并根据我们近期的采集结果增加了一些全球范围或台湾地区的新寄主记录。
给出了更新后的台湾白粉菌名录，其中包括白粉菌科13个物种在28种寄主植物上的数据。可疑记录已作标记并建议进一步调查。为便于农业应用，名录中增加了寄主植物用途的信息。此外，根据ITS序列和无性型形态特征鉴定了作者近期在台湾常见植物上采集的20余份白粉菌科标本。在这些采集中，有12份代表全球新寄主记录，17份为台湾新寄主记录。在台湾首次发现了6种白粉菌科真菌。
台湾白粉菌科名录是分类学和生物地理学研究以及白粉菌检疫制裁的重要依据。我们的结果表明，这些病原菌的寄主谱在全球范围内仍未完全清楚。此外，该名录包括一些可疑的旧记录，可能是同义词或错误鉴定。形态特征和ITS序列通常有助于白粉菌科的鉴定。然而，某些属中的几个物种无法区分，因为那些近缘物种的序列数据差异很小。必须进行新的采集和对旧标本的重新调查，以澄清一些可疑记录。
