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Issue: Vol. 759 No. 3: 29 May 2026
Type: Article
Published: 2026-05-29
DOI: 10.11646/phytotaxa.759.3.1
Page range: 201-221
Abstract views: 0
PDF downloaded: 0

Morpho-phylogenetic characterisation of Hypoxylon kaiyangense: a novel species from the phosphogypsum habitats from Kaiyang, Guizhou, China

Key Laboratory for Improving Quality and Productivity of Arable Land of Yunnan Province; College of Resources and Environment; Yunnan Agricultural University; Kunming; Yunnan 650201; China
Key Laboratory of Biodiversity and Biogeography; Kunming Institute of Botany; Chinese Academy of Sciences; Kunming 650201; P.R. China
Weng-fu (Group) Co.; Ltd.; Fuquan 550509; China
Key Laboratory for Improving Quality and Productivity of Arable Land of Yunnan Province; College of Resources and Environment; Yunnan Agricultural University; Kunming; Yunnan 650201; China
Key Laboratory for Improving Quality and Productivity of Arable Land of Yunnan Province; College of Resources and Environment; Yunnan Agricultural University; Kunming; Yunnan 650201; China
Key Laboratory for Improving Quality and Productivity of Arable Land of Yunnan Province; College of Resources and Environment; Yunnan Agricultural University; Kunming; Yunnan 650201; China
Key Laboratory for Improving Quality and Productivity of Arable Land of Yunnan Province; College of Resources and Environment; Yunnan Agricultural University; Kunming; Yunnan 650201; China
Key Laboratory for Improving Quality and Productivity of Arable Land of Yunnan Province; College of Resources and Environment; Yunnan Agricultural University; Kunming; Yunnan 650201; China
Guizhou Key Laboratory of Plateau Wetland Conservation and Restoration; Guizhou University of Engineering Science; Bijie; Guizhou; 551700; China
Key Laboratory for Improving Quality and Productivity of Arable Land of Yunnan Province; College of Resources and Environment; Yunnan Agricultural University; Kunming; Yunnan 650201; China
Key Laboratory of Biodiversity and Biogeography; Kunming Institute of Botany; Chinese Academy of Sciences; Kunming 650201; P.R. China; Department of Health Sciences; Faculty of Medicine and Health Sciences; University of Mauritius; Réduit 8083; Mauritius; Department of Zoology; College of Science; King Saud University; P.O. Box 22452; 11495 Riyadh; Saudi Arabia; School of Pharmacy; Zunyi Medical University; Guizhou Province 563000; China
Fungi Ascomycetes phylogeny soil fungi taxonomy Xylariaceae

Abstract

We examined the morphological characteristics of a fungal isolate belonging to the genus Hypoxylon, isolated from rhizosphere soil of Patrinia scabiosaefolia in a phosphogypsum disposal site in Kaiyang County, Guizhou Province, China. We also analyzed its DNA sequences (ITS, LSU, tub2, and rpb2) and reconstructed a multi-gene phylogeny to determine its taxonomic placement and investigate its phylogenetic relationships with known Hypoxylon species. This isolate is characterized by production of conidiomata on water agar (WA) and one-celled hyaline, and ellipsoidal conidia. DNA-based phylogenies, inferred from a multi-locus dataset, show that our new species, H. kaiyangense sp. nov. (GT4-032) is closely related to H. ticinense in a fully supported subclade within Hypoxylon (Clade 6). However, significant nucleotide differences were observed across all gene loci between H. kaiyangense, H. ticinense and related species in Clade 6. The conidia of H. ticinense are significantly smaller than those of our new species while conidia of H. haematostroma are significantly larger. The new species possesses a rough-walled virgariella-like conidiogenous structure with roughened conidiogenous cells, whereas H. ticinense has a smooth, pale olivaceous conidiogenous structure with smooth conidiogenous cells bearing denticulate conidial secession scars. The morphological and phylogenetic evidence supports recognition of our isolate from this phosphogypsum environment as a novel species, for which the name Hypoxylon kaiyangense is proposed. This study not only enriches the diversity of Hypoxylon species in China but also provides research avenues for potential exploitation of such fungi in ecological restoration and bioremediation.

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How to Cite

Liu, H., Li, J., Wang, L., Di, X., Hu, Y., Kou, M., Peng, Y., Zuo, D., Li, W., Yan, K. & Jeewon, R. (2026) Morpho-phylogenetic characterisation of Hypoxylon kaiyangense: a novel species from the phosphogypsum habitats from Kaiyang, Guizhou, China. Phytotaxa 759 (3): 201–221. https://doi.org/10.11646/phytotaxa.759.3.1