Eight new Arthrinium species from China.

Mei Wang,Fang Liu,Lei Cai,Xiao-Ming Tan

doi:10.3897/mycokeys.34.24221

Abstract

The genus Arthrinium includes important plant pathogens, endophytes and saprobes with a wide host range and geographic distribution. In this paper, 74 Arthrinium strains isolated from various substrates such as bamboo leaves, tea plants, soil and air from karst caves in China were examined using a multi-locus phylogeny based on a combined dataset of ITS rDNA, TEF1 and TUB2, in conjunction with morphological characters, host association and ecological distribution. Eight new species were described based on their distinct phylogenetic relationships and morphological characters. Our results indicated a high species diversity of Arthrinium with wide host ranges, amongst which, Poaceae and Cyperaceae were the major host plant families of Arthrinium species.

Highlights

Arthrinium Kunze is an anamorph-typified genus, which has been traditionally linked to the teleomorph-typified genus Apiospora Sacc. (Ellis 1971, Seifert et al 2011)
74 Arthrinium strains isolated from various substrates such as bamboo leaves, tea plants, soil and air from karst caves in China were examined using a multi-locus phylogeny based on a combined dataset of ITS rDNA, translation elongation factor 1-alpha (TEF1) and TUB2, in conjunction with morphological characters, host association and ecological distribution
All the Arthrinium strains in this study separated into 13 clades, representing five known (A. arundinis, A. hydei, A. rasikravindrii, A. thailandicum, A. xenocordella) and eight new species (Figure 1)

Summary

Introduction

Arthrinium Kunze is an anamorph-typified genus, which has been traditionally linked to the teleomorph-typified genus Apiospora Sacc. (Ellis 1971, Seifert et al 2011). It is strikingly different from other anamorphic genera for the presence of basauxic conidiophores (Hughes 1953, Minter 1985). (1892) by the absence of sporodochia and pseudoparenchyma (Minter 1985) Both genera have been reduced to the generic synonyms of Arthrinium, based on molecular phylogenetic data (Crous et al 2013)

Methods

Results

Conclusion