Phylogenetic relationships and generic affinity of Uncinula septata inferred from nuclear rDNA sequences (original) (raw)

Abstract

Based on 18S, 5.8S, and 28S rDNA sequences, the phylogenetic position of Uncinula septata within the Erysiphales has been inferred. Although appendages of the ascomata are uncinula like, i.e., unbranched with curved-coiled apices, U. septata is situated at the very base of the large Erysiphales cluster, far away from the “pseudoidium clade” (Erysiphe emend., including Microsphaera and Uncinula). Morphologically, U. septata differs from the species of Erysiphe sect. Uncinula (≡Uncinula) in having terminal, pluriseptate ascoma appendages, curved ascospores, and the absense of an anamorph. This species is a basal, tree-inhabiting powdery mildew with some additional ancestral characteristics, viz., uncinula-like appendages and 8-spored asci. The new genus Parauncinula with U. septata as the type species is proposed. Uncinula curvispora (≡U. septata var. curvispora) is tentatively maintained as a separate species, which is also assigned to Parauncinula.

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Authors and Affiliations

1. Faculty of Bioresources, Mie University, 1515 Kamihama, Tsu, Mie, 514-8507, Japan
   Susumu Takamatsu & Saranya Limkaisang
2. Institut für Geobotanik und Botanischer Garten, Martin-Luther-Universität, Herbarium, Halle (Saale), Germany
   Uwe Braun

Authors

1. Susumu Takamatsu
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2. Uwe Braun
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3. Saranya Limkaisang
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Correspondence toSusumu Takamatsu.

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Takamatsu, S., Braun, U. & Limkaisang, S. Phylogenetic relationships and generic affinity of Uncinula septata inferred from nuclear rDNA sequences.Mycoscience 46, 9–16 (2005). https://doi.org/10.1007/s10267-004-0205-9

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• Received: 15 July 2004
• Accepted: 17 September 2004
• Issue Date: February 2005
• DOI: https://doi.org/10.1007/s10267-004-0205-9

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