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Issue: Vol. 176 No. 1: 20 August 2014
Type: Article
Published: 2014-08-20
DOI: 10.11646/phytotaxa.176.1.25
Page range: 260–269
Abstract views: 96
PDF downloaded: 95

The sexual state of Setophoma 

World Agroforestry Centre, East and Central Asia, Kunming 650201, China Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China Institute of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand 4School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand International Fungal Research & Development Centre, Research Institute of Resource Insects, Chinese Academy of Forestry, Kunming, Yunnan, 650224, PR China
Institute of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Institute of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Institute 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 Agroforestry Centre, East and Central Asia, Kunming 650201, China Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
Landcare Research, Private Bag 92170, Auckland, New Zealand
World Agroforestry Centre, East and Central Asia, Kunming 650201, China Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China Institute of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand International Fungal Research & Development Centre, Research Institute of Resource Insects, Chinese Academy of Forestry, Kunming, Yunnan, 650224, PR China
asexual morph Phaeosphaeriaceae phylogeny Setophoma sacchari sugarcane taxonomy

Abstract

A sexual state of Setophoma, a coelomycete genus of Phaeosphaeriaceae, was found causing leaf spots of sugarcane (Saccharum officinarum). Pure cultures from single ascospores produced the asexual morph on rice straw and bamboo pieces on water agar. Multiple gene phylogenetic analysis using ITS, LSU and RPB2 showed that our strains belong to the family Phaeosphaeriaceae. The strains clustered with Setophoma sacchari with strong support (100% ML, 100% MP and 1.00 PP) and formed a well-supported clade with other Setophoma species. Therefore our strains are identified as S. sacchari. In this paper descriptions and photographs of the sexual and asexual morphs of S. sacchari are provided. The sexual state of S. sacchari is compared with Leptosphaeria sacchari, L. saccharicola, Phaeosphaeria nodorum and Sphaerulina sacchari which have similar morphological characters; however they differ in size and colour of ascospores and in the characters of the asexual state. Setophoma is clearly separated from other Phaeosphaeria species based on the phylogenetic analysis.