Additions to the saprobic fungi (Ascomycota) associated with macadamia trees from the Greater Mekong Subregion

By

Zhang, Xian
Tibpromma, Saowaluck
Karunarathna, Samantha C.
Du, Tianye
Han, Lisu
Elgorban, Abdallah M.
Kumla, Jaturong
Senwanna, Chanokned
Dai, Dong-Qin
Suwannarach, Nakarin
Wang, Hao-Han

Type

Article

Date of Publication

2025

Original Publication

MycoKeys

Volume

113

Pages

1--29

Subjects

Dothideomycetes , Morphology , multigene phylogeny , new taxa , saprobes , Sordariomycetes , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.113.140031

 

Abstract

Macadamia trees, the most economically important Proteaceae perennial crop, are globally renowned for their edible nuts. During our surveys of microfungi associated with macadamia in China and Thailand, we isolated three saprobic fungi from dead macadamia branches. Our multigene phylogenetic analyses (ITS, LSU, SSU, tef1-α, TUB2, and ACT loci), genealogical concordance phylogenetic species recognition (GCPSR) with a pairwise homoplasy index (PHI) test, and morphological characteristics led to the discovery of two new species, Dothiorella macadamiae and Phaeoacremonium chiangmaiense, and one new record, Melomastia puerensis. We provide morphological descriptions, photo plates, phylogenetic analysis results, and PHI test results of the two new species, along with comparisons with closely related taxa. These findings have global implications for understanding the diversity of microfungi associated with macadamia trees.