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Issue: Vol. 411 No. 4: 24 July 2019
Type: Article
Published: 2019-07-24
DOI: 10.11646/phytotaxa.411.4.1
Page range: 243–263
Abstract views: 18
PDF downloaded: 1

Morphology and phylogeny reveal Stemphylium dianthi sp. nov. and new host records for the sexual morphs ofS. beticola, S. gracilariae, S. simmonsii and S. vesicariumfrom Italy and Russia

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, 100097, China. Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
World Agro forestry 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.
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand World Agro forestry 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.
Department of Health Sciences, Faculty of Science, University of Mauritius, Reduit, Mauritius.
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, 100097, China.
Russian Research Institute of Floriculture and Subtropical Crops, 2/28 Yana Fabritsiusa Street, Sochi 354002, Krasnodar region, Russia.
A.M.B, Circolo Micologico ‘‘Giovanni Carini’’, C.P. 314, Brescia, Italy A.M.B. Gruppo, Micologico Forlivese ‘‘Antonio Cicognani’’, Via Roma 18, Forlí, Italy Società per gli Studi Naturalistici della Romagna, C.P. 143, Bagnacavallo, RA, Italy
School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand
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, 100097, China.
1 new species 4 new host records fungi plant pathogens Pleospora phylogeny taxonomy

Abstract

In an investigation of related pleosporalean taxa collected from Italy and Russia, a novel species, Stemphylium dianthi and new host and geographical records ofS. beticola, S. gracilariae, S. simmonsii and S. vesicarium are reported. Stemphylium is a genus of filamentous ascomycetes comprising plant pathogens and saprobes in the family Pleosporaceae. Our new species, S. dianthi is a dematiaceous hyphomycete, which can be distinguished from other hyphomycetes as it forms phaeodictyospores based on the percurrent rejuvenation of its conidiophores, and apically swollen conidiogenous cells. The sexual morphs ofS. gracilariaeand S. vesicarium are new host records from Italy and Russia respectively. Stemphylium beticola from dead stem of Dianthus capitatus and S. simmonsii from Acer campestre are herein described from a natural host substrate for the first time. An updated phylogenetic tree for Stemphylium is constructed using multi-genes (ITS, gapdh and cmdA) to confirm the phylogenetic relationships of Stemphylium species presented in this study. This paper provides morphological descriptions, illustrations and molecular data for each taxon.