<Emphasis Type="Italic">Erysiphe monascogera</Emphasis> sp. nov., an unusual powdery mildew fungus found on fruits of <Emphasis Type="Italic">Styrax japonica</Emphasis> |
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Authors: | Yoshiaki Shiroya Chiharu Nakashima Susumu Takamatsu |
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Institution: | (1) Graduate School of Bioresources, Mie University, 1577 Kurimamachiya, Tsu, Mie 514-8507, Japan |
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Abstract: | Morphological observations using light and scanning electron microscopes and molecular phylogenetic analysis revealed that
the fungus growing on the surface of fruits or sepals of Styrax japonica collected at Nagano, Japan, is a new powdery mildew with an unusual morphology, described here as Erysiphe monascogera. This fungus has mainly a single ascus in a chasmothecium, but molecular phylogenetic analysis and the shape of the hyphal
appressoria suggest that it is an Erysiphe species. Erysiphe monascogera is a sister-species to E. nomurae on Symplocos chinensis var. leucocarpa f. pilosa, although there are obvious morphological differences between the two species. This inconsistency between molecular phylogeny
and morphology may be explained by the unique habitat of E. monascogera. Erysiphe monascogera and E. nomurae are included in a clade composed of the E. alphitoides complex, which suggests that these two species diverged by host jumping of the E. alphitoides complex, having oaks as major host plants. |
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Keywords: | Erysiphaceae Erysiphales Erysiphe Molecular phylogeny New species |
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