﻿Pleocatenatachiangraiensis gen. et. sp. nov. (Pleosporales, Dothideomycetes) from medicinal plants in northern Thailand.

Ya-Ru Sun,Yong Wang,Ning-Guo Liu,Ruvishika S Jayawardena,Kevin D Hyde

doi:10.3897/mycokeys.87.79433

Abstract

Pleocatenata, a new genus, is introduced with its type species, Pleocatenatachiangraiensis, which was isolated from withered twigs of two medicinal plants, Clerodendrumquadriloculare (Blanco) Merr (Verbenaceae) and Tarennastellulata (Hook.f.) Ridl (Rubiaceae) in northern Thailand. The genus is characterized by mononematous, septate, brown or dark brown conidiophores, monotretic conidiogenous cells and catenate, obclavate, olivaceous to blackish brown conidia. Phylogenetic analysis of combined LSU, SSU, tef1-α, rpb2 and ITS sequence data showed Pleocatenata forms a distinct phylogenetic lineage in Pleosporales, Dothideomycetes. Therefore, we treat Pleocatenata as Pleosporales genera incertae sedis based on morphology and phylogenetic analyses. Descriptions and illustrations of the new taxa are provided, and it is compared with morphologically similar genera.

Highlights

Medicinal plants are a rich source of natural products with biological and chemical properties
Blast searches of Large subunit (LSU), tef1-α, rpb2 and internal transcribed spacers (ITS) sequences data in NCBI showed that our sequences were related to Acrocalymmaceae, Amorosiaceae, Sporormiaceae and Sublophiostomataceae
Pleocatenata is phylogenetically related to Amorosiaceae, Sporormiaceae, and Sublophiostomataceae in our multi-gene analyses, but their monophyly was not well-supported, indicating their uncertain phylogenetic affinities

Summary

Introduction

Medicinal plants are a rich source of natural products with biological and chemical properties. Pleosporales is the largest order in Dothideomycetes, which accounts for about a quarter of the class (Zhang et al 2012; Hyde et al 2013; Hongsanan et al 2020a) They have a worldwide distribution with diverse lifestyles, including saprobes, pathogens of plants and humans, endophytes, epiphytes and hyperparasites (Ramesh 2003; Kirk et al 2008; Zhang et al 2012; Hyde et al 2013; Sun et al 2019; Ferdinandez et al 2021). Nelson has mosquito-larvicidal activity (Abutaha et al 2015)

Methods

Results

Conclusion