New Helminthosporium (Massarinaceae, Dothideomycetes) and Nigrospora (Incertae sedis, Sordariomycetes) species associated with walnut (Juglans regia L.) in China

By

Zou, Mengting
Al-Otibi, Fatimah Olyan
Hyde, Kevin D
Wang, Yong
Pan, Xue Jun

Type

Article

Date of Publication

2024

Original Publication

MycoKeys

Volume

109

Pages

265--284

Subjects

Ascomycota , Morphology , new taxa , Phylogeny , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.109.133431

 

Abstract

Six collections of ascomycetes were obtained from samples collected from dead branches and leaves ofJuglans regiain Guizhou and Yunnan provinces, China. By incorporating multigene phylogenetic analysis (ITS, LSU,rpb2, SSU,tef1-α,tub2) supplemented by morphological data, we establish two novel species, namelyHelminthosporium guizhouenseandNigrospora yunnanensis. In morphology,H. guizhouensecan be distinguished fromH. caespitosumby its narrower conidia (13–16 µm vs. 27.3–35.5 µm), andN. yunnanensisis characterized by black, globose conidia (16.2 × 14.4 µm). The phylogenetic results further substantiated them as novel taxa. The present study contributes to our comprehension of the range of fungi found inJuglans regia, thereby expanding our knowledge of the diversity of fungi within this host.