Sawadaea nankinensis comb. nov.: a powdery mildew fungus of Acer buergerianum |
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Authors: | Susumu Takamatsu Terumitsu Ito Hideo Yamamoto Uwe Braun |
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Institution: | 1. Faculty of Bioresources, Mie University, 1577 Kurima-Machiya, Tsu, 514-8507, Japan 2. Tsushima-Honmachi, Okayama, Japan 3. Institut für Geobotanik und Botanischer Garten, Martin-Luther-Universit?t, FB. Biologie, Herbarium, Neuwerk, Germany
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Abstract: | The anamorphic state of a powdery mildew on trident maple (Acer buergerianum, Aceraceae), belonging to Sawadaea, has been observed since 1980 in Tokyo and other areas of Japan. Since the autumn of 2003, this fungus has begun to produce
chasmothecia in various areas of Japan, which were consistent with Erysiphe nankinensis (= Uncinula nankinensis), but apparently contradictory to the characteristics of the anamorph. Based on a molecular phylogenetic analysis using DNA
separately extracted from the anamorph and teleomorph of the fungus on A. buergerianum, it could be demonstrated that sequences of this fungus are sister to Sawadaea. As the anamorph belongs to Oidium subgen. Octagoidium and because of the phylogenetic position within the Sawadaea clade, the new combination Sawadaea nankinensis is proposed for this species. The genus Sawadaea is emended to comprise species with consistently unbranched appendages. |
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Keywords: | Aceraceae Erysiphaceae Erysiphales Erysiphe nankinensis Molecular phylogeny |
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