A new species of Scytalidium causing slippery scar on cultivated Auricularia polytricha in China. Issue 1 (2nd September 2014)

• Record Type: Journal Article
• Authors: Peng, Weihong; He, Xiaolan; Wang, Yong; Zhang, Yong; Ye, Xiaojin; Jia, Dinghong; Guo, Yong; Gan, Bingcheng; Zheng, Chao; Yang, Zhirong; Sun, Qun
• Is Part Of: FEMS microbiology letters. Volume 359:Issue 1(2014:Oct.)
• Page Start: 72
• Page End: 80
• Publication Date: 2014-09-02
• Subjects: Microbiology -- Periodicals; 579
• DOI: 10.1111/1574-6968.12564
• Languages: English
• ISSNs: 0378-1097

Abstract

<abstract abstract-type="main" id="fml12564-abs-0001"> <title>Abstract</title> <p>Slippery scar is one of the most destructive diseases encountered in the cultivation of <italic>Auricularia polytricha</italic> (hairy wood ear); however, the identity of the pathogenic agent has remained uncertain. This study was designed to identify the causative pathogen of slippery scar in <italic>A. polytricha</italic> and to investigate the taxonomic classification of the pathogen by morphological observations, <italic>in vivo</italic> pathogenicity tests, and molecular evidences of ITS and RPB2 sequences. The results showed that the pathogen was a new <italic>Scytalidium</italic> species, here named <italic>Scytalidium auriculariicola</italic>. <italic>Scytalidium auriculariicola</italic> was characterized by its rapid growth rate, the catenate conidia of variable size, and the pale brown to brown chlamydoconidia. Phylogenetic analyses based on internal transcribed spacer regions and RPB2 sequences on the pathogen isolated and related species supported that <italic>S. auriculariicola</italic> was a true <italic>Scytalidium</italic> species. It was congeneric with and close to <italic>Scytalidium lignicola</italic>, the type species of <italic>Scytalidium</italic>. However, it differed from the latter species in the size of conidia, 33 different nucleotide bases in ITS sequences and 30 different nucleotide bases in RPB2 sequences.</p> </abstract>