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Issue: Vol. 422 No. 3: 30 October 2019
Type: Article
Published: 2019-10-30
DOI: 10.11646/phytotaxa.422.3.1
Page range: 209–224
Abstract views: 29
PDF downloaded: 1

A morpho-molecular re-appraisal of Polystigma fulvum and P. rubrum (Polystigma, Polystigmataceae)

Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand Division of Plant Pathology, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
Department of Health Sciences, Faculty of Science, University of Mauritius, Reduit, Mauritius
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand World Agroforestry Centre East and Central Asia Office, 132 Lanhei Road, Kunming 650201, China Key Laboratory for Plant Biodiversity and Biogeography of East Asia (KLPB), Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan, China
Russian Research Institute of Floriculture and Subtropical Crops, 2/28 Yana Fabritsiusa Street, Sochi 354002, Krasnodar region, Russia
Department of Botany, Belarusian State University, 4 Nezavisimosti Av., Minsk 220030, Belarus
Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China, Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
Division of Plant Pathology, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand World Agroforestry Centre East and Central Asia Office, 132 Lanhei Road, Kunming 650201, China Key Laboratory for Plant Biodiversity and Biogeography of East Asia (KLPB), Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan, China
biotrophs molecular phylogeny Rosaceae taxonomy Xylariomycetidae Fungi

Abstract

Collections of eleven Prunus specimens infected with Polystigma species from Belarus and Russia yielded two existing taxa: Polystigma fulvum (sexual morph) and Polystigma rubrum (asexual morph). DNA based phylogenies of large subunit nuclear rDNA (LSU) and nuclear ribosomal internal transcribed spacer (ITS) are provided for the first time for Polystigma fulvum and its placement is confirmed within Polystigmataceae. The concatenated LSU and ITS DNA sequence data for P. rubrum, analyzed to infer its potential relationship to other Polystigma species, also show that strains of P. rubrum are segregated into two subclades with sufficient genetic differences. No significant differences in morphology or morphometry among the strains of P. rubrum between the two subclades, especially vis-à-vis the conidiogenous cell and conidium sizes are observed (P>0.05). Subspecies concept of P. rubrum complex is discussed.