Gomdola Deecksha, Jeewon Rajesh, Gentekaki Eleni, S Jayawardena Ruvishika, Hyde Kevin D, Alotibi Fatimah, Wang Yong
Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, Guizhou 550025, China.
School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand.
MycoKeys. 2024 Dec 20;111:181-210. doi: 10.3897/mycokeys.111.136202. eCollection 2024.
species are dematiaceous hyphomycetes that are characterised by acropleurogenous, dictyoseptate, campanulate or cheiroid, and brown to dark brown conidia that are composed of several layers of cells radiating from a protuberant basal cell, and mostly seen with appendages arising from the apical cells. The genus was introduced based on morphology to accommodate five of the six species that exhibited holoblastic conidial ontogeny. was referred to as Ascomycota genus as it was challenging to resolve its taxonomic placement based solely on the available morphological data (no DNA sequence data was previously available). In this study, we provide DNA sequence data for LSU, ITS, SSU, , and for our isolates, collected from (Moraceae) in northern Thailand. Based on morphology, we classify our isolates as . Since they form a sister lineage to , we place in Pseudoberkleasmiaceae (Pleosporales). Within , we establish these two isolates as a new taxon, , in view of the presence of new conidiogenous cells developing from subtending cells. differs from the extant species in the genus as it has longer conidiophores that are sometimes branched, comprising numerous septa, and its appendages are mostly untapered (sometimes tapering) towards the tips, a feature not observed in other species. This is the first study to provide DNA sequence data and phylogenetic relationships for . Furthermore, we analysed selected DNA sequence data and provided an updated phylogenetic tree incorporating all families (with representative genera) of Pleosporales.
该物种为暗色丝孢菌，其特征为顶侧生、具隔、钟形或鸡爪形，分生孢子呈棕色至深棕色，由几层从突出的基部细胞辐射状排列的细胞组成，且大多可见从顶端细胞生出的附属物。该属基于形态学被建立，以容纳六个表现出全壁芽生式分生孢子发生的物种中的五个。由于仅根据现有的形态学数据（以前没有DNA序列数据）来确定其分类位置具有挑战性，该属曾被归为子囊菌门。在本研究中，我们提供了从泰国北部桑科植物收集的分离株的 LSU、ITS、SSU、[此处可能缺失部分基因名称]和[此处可能缺失部分基因名称]的DNA序列数据。基于形态学，我们将我们的分离株归类为[此处可能缺失具体分类名称]。由于它们形成了[此处可能缺失对比物种名称]的姐妹谱系，我们将[此处可能缺失具体分类名称]置于假伯克氏菌科（格孢腔菌目）中。在[此处可能缺失具体分类名称]内，鉴于存在从基部细胞发育而来的新产孢细胞，我们将这两个分离株确立为一个新分类群，即[此处可能缺失新分类群名称]。[此处可能缺失新分类群名称]与该属现存物种不同，因为它有更长的分生孢子梗，有时分枝，包含许多隔膜，并且其附属物大多向顶端不渐细（有时渐细），这一特征在其他[此处可能缺失对比物种名称]物种中未观察到。这是第一项为[此处可能缺失具体分类名称]提供DNA序列数据和系统发育关系的研究。此外，我们分析了选定的DNA序列数据，并提供了一个更新的系统发育树，纳入了格孢腔菌目的所有科（以及代表性属）。
