Two new fungal genera (Diaporthales) found on Dipterocarpaceae in Thailand

Xia Tang; Yong-Zhong Lu; Lakmali S Dissanayake; Ishani D Goonasekara; Ruvishika S Jayawardena; Yuan-Pin Xiao; Kevin D Hyde; Xue-Mei Chen; Ji-Chuan Kang

doi:10.3389/fmicb.2023.1169052

Two new fungal genera (Diaporthales) found on Dipterocarpaceae in Thailand

Front Microbiol. 2023 Jun 5:14:1169052. doi: 10.3389/fmicb.2023.1169052. eCollection 2023.

Authors

Xia Tang^{1

2

3}, Yong-Zhong Lu^{1

4}, Lakmali S Dissanayake¹, Ishani D Goonasekara^{2

5}, Ruvishika S Jayawardena^{2

3}, Yuan-Pin Xiao⁴, Kevin D Hyde^{2

3}, Xue-Mei Chen⁴, Ji-Chuan Kang¹

Affiliations

¹ Engineering and Research Center for Southwest Biopharmaceutical Resource of National Education Ministry of China, Guizhou University, Guiyang, Guizhou, China.
² Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand.
³ School of Science, Mae Fah Luang University, Chiang Rai, Thailand.
⁴ School of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang, Guizhou, China.
⁵ International Relations Unit, The Open University of Sri Lanka, Nawala, Nugegoda, Sri Lanka.

Abstract

Diaporthales is a species-rich order of fungi that includes endophytes, saprobes, and pathogens associated with forest plants and crops. They may also occur as parasites or secondary invaders of plant tissues injured or infected by other organisms or inhabit living animal and human tissues, as well as soil. Meanwhile, some severe pathogens wipe out large-scale cultivations of profitable crops, timber monocultures, and forests. Based on morphological and phylogenetic analyses of combined ITS, LSU, tef1-α, and rpb2 sequence data, generated using maximum likelihood (ML), maximum parsimony (MP), and MrBayes (BI), we introduce two new genera of Diaporthales found in Dipterocarpaceae in Thailand, namely Pulvinaticonidioma and Subellipsoidispora. Pulvinaticonidioma is characterized by solitary, subglobose, pycnidial, unilocular conidiomata with the internal layers convex and pulvinate at the base; hyaline, unbranched, septate conidiophores; hyaline, phialidic, cylindrical to ampulliform, determinate conidiogenous cells and hyaline, cylindrical, straight, unicellular, and aseptate conidia with obtuse ends. Subellipsoidispora has clavate to broadly fusoid, short pedicellate asci with an indistinct J- apical ring; biturbinate to subellipsoidal, hyaline to pale brown, smooth, guttulate ascospores that are 1-septate and slightly constricted at the septa. Detailed morphological and phylogenetic comparisons of these two new genera are provided in this study.

Keywords: 2 new taxa; Sordariomycetes; morphology; multi-gene phylogeny; saprophytic fungi; taxonomy.

Grants and funding

This study was funded by the National Natural Science Foundation of China (NSFC Grants Nos. 32170019, 31670027, and 31460011) and the Open Fund Program of Engineering Research Center of Southwest Bio-Pharmaceutical Resources, Ministry of Education, Guizhou University No. GZUKEY20160702 each provided funding for this project. The authors acknowledge the Thailand Research Fund grant entitled Impact of climate change on fungal diversity and biogeography in the Greater Mekong Sub-region (RDG6130001) and the National Research Council of Thailand (NRCT) grant, Total fungal diversity in a given forest area with implications toward species numbers, chemical diversity and biotechnology (grant no. N42A650547).