Bambusicolous Arthrinium Species in Guangdong Province, China.

Indunil C Senanayake,Ning Xie,Jayarama D Bhat,Ratchadawan Cheewangkoon

doi:10.3389/fmicb.2020.602773

Abstract

A survey of bambusicolous fungi in Bijiashan Mountain Park, Shenzhen, Guangdong Province, China, revealed several Arthrinium-like taxa from dead sheaths, twigs, and clumps of Bambusa species. Phylogenetic relationships were investigated based on morphology and combined analyses of the internal transcribed spacer region (ITS), large subunit nuclear ribosomal DNA (LSU), beta tubulin (β-tubulin), and translation elongation factor 1-alpha (tef 1-α) gene sequences. Based on morphological characteristics and phylogenetic data, Arthrinium acutiapicum sp. nov. and Arthrinium pseudorasikravindrae sp. nov. are introduced herein with descriptions and illustrations. Additionally, two new locality records of Arthrinium bambusae and Arthrinium guizhouense are described and illustrated.

Highlights

Arthrinium Kunze is accommodated in Apiosporaceae, Xylariales, which is morphologically different from other xylariaceous genera by the presence of basauxic conidiophores and dark, aseptate, globose to lenticular conidia with a hyaline rim or germ slit (Minter, 1985; Petrini and Müller, 1986; Singh et al, 2012; Jiang et al, 2018; Pintos et al, 2019)
All individual trees generated under different criteria and from single gene datasets were essentially similar in topology and not significantly different from the tree generated from the concatenated dataset
After discarding the first 20% of generations, 36,000 trees remained from which 50% consensus trees and posterior probabilities (PP) were calculated (Figure 1)

Summary

Introduction

Arthrinium Kunze is accommodated in Apiosporaceae, Xylariales, which is morphologically different from other xylariaceous genera by the presence of basauxic conidiophores and dark, aseptate, globose to lenticular conidia with a hyaline rim or germ slit (Minter, 1985; Petrini and Müller, 1986; Singh et al, 2012; Jiang et al, 2018; Pintos et al, 2019). The genus Arthrinium morphologically differs from other xylariaceous anamorphic genera by the presence of basauxic conidiogenous cells which arise from conidiophore mother cells (Schmidt and Kunze, 1817; Minter, 1985).

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