Research Article |
Corresponding author: Antonio Roberto Gomes de Farias ( antonio.gom@mfu.ac.th ) Academic editor: Samantha C. Karunarathna
© 2024 Antonio Roberto Gomes de Farias, Naghmeh Afshari, Veenavee S. Hittanadurage Silva, Johnny Louangphan, Omid Karimi, Saranyaphat Boonmee.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
de Farias ARG, Afshari N, Silva VSH, Louangphan J, Karimi O, Boonmee S (2024) Three novel species and new records of Kirschsteiniothelia (Kirschsteiniotheliales) from northern Thailand. MycoKeys 101: 347-370. https://doi.org/10.3897/mycokeys.101.115286
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Kirschsteiniothelia (Kirschsteiniotheliales, Pleosporomycetidae) includes 39 saprobic species recorded from dead or decaying wood in terrestrial and freshwater habitats. This study focuses on exploring Kirschsteiniothelia diversity in woody litter in Thailand. Wood samples were collected from forest areas in Chiang Rai and Chiang Mai Provinces in Thailand and examined for fungal fructifications. Fungal isolates were obtained and their morphological and sequence data were characterised. Micromorphology associated with multilocus phylogeny of ITS, LSU and SSU sequence data identified three isolates as novel species (Kirschsteiniothelia inthanonensis, K. saprophytica and K. zizyphifolii) besides new host records for K. tectonae and K. xishuangbannaensis. The placement of the new taxa and records are supported by morphological illustrations, descriptions and molecular phylogenies and the implications of these findings are discussed. Our findings provide information for understanding Kirschsteiniothelia diversity and ecology.
Multilocus phylogeny, new host records, saprobic fungi, three new species, woody litter
Since its introduction by
Kirschsteiniothelia sexual morphs essentially have superficial to semi-immersed, subglobose to globose, dark brown to black ascomata; cylindrical clavate, bitunicate, 8-spored asci; and brown to dark brown, ellipsoidal, septate ascospores with or without a mucilaginous sheath (
Kirschsteiniothelia species are mostly saprobes on dead or decaying wood in freshwater and terrestrial habitats (
This study focuses on exploring Kirschsteiniothelia diversity in woody litter in Thailand. We introduce three new species viz. K. inthanonensis, K. saprophytica and K. zizyphifolii, along with two new host records of Kirschsteiniothelia, based on a morpho-molecular approach, expanding our knowledge of the diversity in Pleosporomycetidae.
Wood litter samples were collected from forest areas in Chiang Rai and Chiang Mai, Thailand. Morphological studies were performed following the methods described by
Pure cultures were obtained through single spore isolation on Difco potato dextrose agar (PDA) using the spore suspension method (
Genomic DNA was extracted from fresh mycelium scrapings using the EE.Z.N.A. Tissue DNA Kit from Omega Bio-tek, Inc., following the manufacturer’s instructions. PCR amplifications were performed in a 50 μl reaction volume containing 10× PCR Master Mix, forward and reverse primers, DNA template and double sterilised H2O. Amplified DNA of the ITS, LSU and SSU were obtained through a polymerase chain reaction (PCR) using the pairs of primers ITS4/ITS5 (
The reads were assembled using the Staden Package (
Names, strain numbers, and corresponding GenBank accession numbers of Kirschsteiniotheliales taxa used in the phylogenetic analyses.
Taxa | Strains | Accession numbers | ||
---|---|---|---|---|
ITS | LSU | SSU | ||
Acrospermum adeanum | M133 | EU940180 | EU940104 | EU940031 |
Acrospermum compressum | M151 | EU940161 | EU940084 | EU940012 |
Acrospermum gramineum | M152 | EU940162 | EU940085 | EU940013 |
Aliquandostipite crystallinus | R 76–1 | – | EF175651 | EF175630 |
Aliquandostipite khaoyaiensis | CBS 118232T | – | GU301796 | – |
Anisomeridium ubianum | MPN94 | – | GU327709 | JN887379 |
Dyfrolomyces rhizophorae | JK5456A | – | GU479799 | GU479766 |
Dyfrolomyces tiomanensis | NTOU3636 | – | KC692156 | KC692155 |
Flavobathelium epiphyllum | MPN67 | – | GU327717 | JN887382 |
Halokirschsteiniothelia maritima | CBS 221.60 | – | AY849943 | AF053726 |
Helicomyces roseus | CBS 283.51 | AY916464 | AY856881 | AY856928 |
|
KY320523 | KY320540 | – | |
Homortomyces combreti | CPC 19808T | JX517281 | JX517291 | – |
Homortomyces tamaricis |
|
KU752184 | KU561874 | KU870905 |
|
KU934190 | KU561875 | – | |
|
NR_155161 | NG_059495 | – | |
Jahnula bipileata | F49–1 T | JN942353 | EF175657 | EF175635 |
Jahnula sangamonensis | A402–1B | JN942349 | EF175661 | EF175639 |
Jahnula seychellensis | SS 2113.2 | – | EF175664 | EF175643 |
Kirschsteiniothelia acutispora |
|
OP120780 | ON980758 | ON980754 |
Kirschsteiniothelia aquatica |
|
MH182587 | MH182594 | MH182618 |
Kirschsteiniothelia arasbaranica | IRAN 2509C | KX621986 | KX621987 | KX621988 |
IRAN 2508CT | KX621983 | KX621984 | KX621985 | |
Kirschsteiniothelia atra | DEN | MG602687 | – | – |
CBS 109.53 | – | AY016361 | AY016344 | |
|
MH182583 | MH182589 | MH182615 | |
S–783 | MH182586 | MH182595 | MH182617 | |
|
KU500571 | KU500578 | KU500585 | |
Kirschsteiniothelia cangshanensis | GZCC19–0515 | – | MW133829 | MW134609 |
|
MH182584 | MH182592 | – | |
|
OR575473 | OR575474 | OR575475 | |
Kirschsteiniothelia crustaceum |
|
MW851849 | MW851854 | – |
Kirschsteiniothelia dushanensis | GZCC 19–0415 | OP377845 | MW133830 | MW134610 |
Kirschsteiniothelia ebriosa | CBS H–23379 | – | LT985885 | – |
Kirschsteiniothelia emarceis |
|
NR_138375 | NG_059454 | – |
Kirschsteiniothelia extensum |
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MW851850 | MW851855 | – |
Kirschsteiniothelia fluminicola |
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MH182582 | MH182588 | – |
Kirschsteiniothelia inthanonensis |
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OR762773 | OR762781 | OR764784 |
Kirschsteiniothelia lignicola |
|
HQ441567 | HQ441568 | HQ441569 |
Kirschsteiniothelia nabanheensis | HJAUP C2006 | OQ023274 | OQ023275 | OQ023037 |
HJAUP C2004T | OQ023197 | OQ023273 | OQ023038 | |
Kirschsteiniothelia phoenicis |
|
NR_158532 | NG_064508 | – |
|
MG859978 | MG860484 | MG859979 | |
Kirschsteiniothelia puerensis | ZHKUCC 22–0272 | OP450978 | OP451018 | OP451021 |
ZHKUCC 22–0271T | OP450977 | OP451017 | OP451020 | |
Kirschsteiniothelia rostrata |
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KY697280 | KY697276 | KY697278 |
Kirschsteiniothelia septemseptatum |
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OP120779 | ON980757 | ON980752 |
Kirschsteiniothelia saprophytica |
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OR762774 | OR762783 | – |
|
OR762775 | OR762782 | – | |
Kirschsteiniothelia spatiosum |
|
– | OP077294 | ON980753 |
Kirschsteiniothelia submersa | S–481 | – | MH182591 | MH182616 |
S–601 | MH182585 | MH182593 | – | |
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KU500570 | KU500577 | KU500584 | |
Kirschsteiniothelia tectonae |
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KU144916 | KU764707 | – |
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KU144924 | – | – | |
Kirschsteiniothelia tectonae |
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OR762771 | OR762779 | OR764782 |
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OR762772 | OR762780 | OR764783 | |
Kirschsteiniothelia thailandica |
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MT985633 | MT984443 | MT984280 |
Kirschsteiniothelia thujina | JF13210 | KM982716 | KM982718 | KM982717 |
Kirschsteiniothelia vinigena | CBS H–23378T | – | NG_075229 | – |
Kirschsteiniothelia xishuangbannaensis | ZHKUCC 22–0221 | OP289563 | OP289565 | OP303182 |
ZHKUCC 22–0220T | OP289566 | OP289564 | OP303181 | |
Kirschsteiniothelia xishuangbannaensis |
|
OR762770 | OR762778 | OR764781 |
|
OR762769 | OR762777 | OR764780 | |
Kirschsteiniothelia zizyphifolii |
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OR762768 | OR762776 | OR764779 |
Megalotremis verrucosa | MPN104 | – | GU327718 | JN887383 |
Phyllobathelium anomalum | MPN 242 | – | GU327722 | JN887386 |
Stemphylium vesicarium | CBS 191.86 | MH861935 | GU238160 | GU238232 |
|
KY659560 | KY659563 | KY659567 | |
Tubeufia helicomyces | CBS 271.52 | AY916461 | AY856887 | AY856933 |
Tubeufia javanica |
|
KJ880034 | KJ880036 | KJ880035 |
Acrospermum adeanum | M133 | EU940180 | EU940104 | EU940031 |
Acrospermum compressum | M151 | EU940161 | EU940084 | EU940012 |
Maximum Likelihood (ML) trees were generated using RAxML-HPC2 on XSEDE (8.2.8) (
The concatenated nucleotide alignment of the ITS, LSU and SSU datasets comprised 69 Kirschsteiniotheliales strains, including the outgroups (S. vesicarium
Parameters | ITS | LSU | SSU |
---|---|---|---|
Evolutionary model | GTR+I+G4 | GTR+G4 | GTR+I+G4 |
Gamma distribution shape parameter α | 0.267050 | 0.557118 | 0.228478 |
Estimated base frequencies | |||
A | 0.199482 | 0.235780 | 0.260410 |
C | 0.306708 | 0.238788 | 0.213687 |
G | 0.279166 | 0.322010 | 0.267932 |
T | 0.214644 | 0.203422 | 0.257971 |
Substitution rates | |||
AC | 1.269939 | 0.865025 | 1.305091 |
AG | 2.734587 | 2.259149 | 2.368982 |
AT | 1.504952 | 1.054098 | 0.620257 |
CG | 1.112253 | 0.931891 | 0.757010 |
CT | 3.835090 | 5.793263 | 8.684577 |
GT | 1.000000 | 1.000000 | 1.000000 |
Maximum Likelihood phylogenetic tree generated from ITS, LSU and SSU sequence data for selected Kirschsteiniotheliales and related Dothideomycetes orders. The tree is rooted with Stemphylium vesicarium (CBS 191.86 and
Four strains (
Kirschsteiniothelia inthanonensis (
The name refers to the location “Doi Inthanon” where the holotype was collected.
Saprobic on decaying wood. Sexual morph: Not observed. Asexual morph: Hyphomycetes. Colonies on the host substrate are superficial, effuse, long hairy, fascicular, scattered, dark brown to black. Mycelium superficial and immersed, composed of branched, septate, pale brown and smooth hyphae. Conidiophores 611–1549 × 2.5–6.6 μm (x̄ = 1070 × 4.1 μm, n = 20), macronematous, synnematous, compact fasciculate, straight to flexuous, brown to dark brown, branched at the apex, multi-septate, thick and smooth-walled. Conidiogenous cells 15–45 × 6.7–10.4 μm (x̄ = 24.3 × 8 μm, n = 20), monotretic to polytretic, calyciform, integrated, discrete, terminal, darkened at the apex, proliferating portion, brown, 2–4 septate. Conidia 24–230 × 5.7–14.3 μm (x̄ = 101 × 9 μm, n = 15), acrogenous, solitary, obclavate, rostrate, straight or curved, truncate at base, grey to brown, pale at apex, partly tapering towards and rounded at the apex, 2–10– euseptate, smooth-walled.
Conidia germinated on PDA within 48 hours. Germ tubes germinated from end cell. Colony, reaching 30–35 mm diam. after one month at room temperature, circular form, flat, undulate edges, dense velvety surface, dark green on the surface, white mycelium on the tip, dark in reverse with dark green margin.
Thailand, Chiang Mai, Chom Thong, Doi Inthanon National Park, on twigs of Quercus oleoides, 30 November 2022, Veenavee Silva, DIFWS5-01 (
Kirschsteiniothelia inthanonensis (
The species epithet refers to the saprobic life mode of the fungus.
Saprobic on dead wood of undetermined host. Sexual morph: Ascomata 146.7–72.26 µm diam., superficial, solitary, globose to subglobose, dark brown to black. Pseudoparaphyses 1.2–2.7 µm wide (x̄ = 1.9, n = 20), hyaline, branched, filiform, abounded. Asci 68–125 × 18–23 µm (x̄ = 101 × 20 µm, n = 10), bitunicate, 8-spored, cylindrical-claviform, sessile or short pedicellate. Ascospores 13–25 (–40) × 7–11 (–14) µm (x̄= 24 × 9.8 µm, n = 25), ellipsoid, upper cell broader than lower cell, pale brown to dark brown, 1-septate, guttulate, smooth-walled. Asexual morph: Hyphomycetous. Colonies on host gregarious. Conidiophores 90–216 × 8–12 µm (x̄ = 165 × 10.6 µm, n = 10), macronematous, mononematous, cylindrical, straight to flexuous, branched, dark brown, multi-septate, constricted at the septa. Conidiogenous cells 6.7–35 × 5–15 µm (x̄ = 17 × 10 µm, n = 10), holoblastic, monoblastic, terminal, cylindrical, brown to dark brown. Conidia 36–69 × 19–35 µm (x̄ = 55 × 27 µm, n = 15), cylindrical rounded at ends, 2–3-septa, dark brown to black, smooth-walled.
Kirschsteiniothelia saprophytica (
Ascospores germinating on PDA within 24 hours. Colonies growing on PDA 16.8 mm diam. at room temperature after 38 days and on MEA 24 mm after 12 days. Mycelium on PDA superficial to immerse, dark olivaceous to dark brown on the top, reverse dark brown to black. Conidia germinating on PDA within 48 h. Colonies growing on PDA 17 mm diam. at room temperature after 16 days. Mycelium superficial to immerse, dark olivaceous to dark brown on the top, reverse dark brown to black.
Kirschsteiniothelia zizyphifolii (
Thailand, Mae Fah Luang University, Chiang Rai, on dead wood of unidentified host, 20 October 2022, V. Silva, V020 (
Our collection (
“zizyphifolii” refers to the host species on which the fungus was found.
Saprobic on Nayariophyton zizyphifolium (Malvaceae) woody litter in terrestrial habitat. Sexual morph: Not observed. Asexual morph: Hyphomycetes. Colonies on the substratum are superficial, effuse, dark brown to black and hairy. Mycelia superficial, composed of septate, branched, smooth-walled, dark brown hyphae. Conidiophores 287–444.5 × 10.3 –17 (–19.7) μm (x̄ = 358.5 × 13.4 μm, n = 15), macronematous, mononematous, erect, with several short branches near the apex, irregular, solitary, cylindrical, flexuous, sometimes slightly straight, dark brown to black, paler towards the apex, septate, smooth-walled. Conidiogenous cells 11–20.4 × 5.8–10.6 μm (x̄ = 14.6 × 7.6 μm, n = 25), tretic, occasionally percurrent, integrated, terminal or intercalary, cylindrical or doliiform, brown, smooth-walled. Conidia (29.5–) 37.6–46.5 × 13.5–19 μm (x̄ = 43 × 16 μm, n = 20), acrogenous, solitary, cylindrical to rarely clavate, rounded at the apex, straight or moderately curved, brown dark to brown, 2–3-septate, constricted and pigmented at the septa, smooth-walled.
Ascospores germinating on PDA within 24 hours, reaching up to 30 mm diam. after one week at room temperature. Germ tubes germinated from both end cells. Colony dense, circular, velvety, narrow towards the edge, from front, grey at centre, black towards edge, from reverse, black.
Thailand, Chiang Rai, Mae Fa Luang, Doi Tung Forest, on dead wood of Nayariophyton zizyphifolium, 26 March 2022, N. Afshari 1C1T2R4b (MFLU23–0415, holotype), ex-type living culture
Kirschsteiniothelia zizyphifolii (
Saprobic on Microcos paniculata (Malvaceae) woody litter in terrestrial habitats. Sexual morph: Not observed. Asexual morph: Hyphomycetes. Colonies on the substrate, hairy, superficial, dark brown, scattered, partially grouped. Conidiophores 59–90 × 8.6–12 μm (x̄ = 75 × 10.7 μm, n = 10), superficial, simple, macronematous, mononematous, cylindrical, straight to slightly curved, branched or unbranched, septate, dark brown to black. Conidiogenous cells 7–9.4 × 6–7.3 μm (x̄ = 8 × 6.7 μm, n = 5), monoblastic, determinate, integrated, terminal. Conidia 62.5– 133 × 11 – 18.5(–21) μm (x̄ = 94 × 16 μm, n = 30), cylindrical-obclavate, elongate, straight to slightly curved, rounded being slightly paler at the apex, obconically truncate at the base, 7–12–septa, olivaceous green to brown, smooth–walled.
Conidia germinating on PDA within 24 hours, reaching up to 15–20 mm diam. after one week at room temperature. Germ tubes generated from basal cells. Colony on PDA, dense, circular, flat or effuse, velvety, from front brown at the centre and black at the edge, from reverse, dark brown.
Thailand, Chiang Rai, Mae Fa Luang, Doi Tung, on dead wood of Microcos paniculata, 6 June 2022, N. Afshari 3C2T3R5 (
Thailand (
Tectona grandis (
Saprobic on Microcos paniculata (Malvaceae) woody litter in terrestrial habitats. Sexual morph: Not observed. Asexual morph: Hyphomycetes. Colonies effuse on the substrate, hairy, solitary or scattered, dark brown. Conidiophores 135–178 × 7.7–11 μm (x̄ = 151 × 9 μm, n = 10), macronematous, straight to curved, solitary, brown, slightly larger at base, narrowing towards apex, septate. Conidiogenous cells 14.4–27.4 × 7.8–11 μm (x̄ = 22 × 10 μm, n = 10), holoblastic, monoblastic, integrated, smooth, terminal, determinate, cylindrical or lageniform, brown. Conidia 70–141 × 14.5–19 μm (x̄ = 100 × 17 μm, n = 20), solitary, acrogenous, obclavate, rostrate, straight or slightly curved, truncate at the base, olivaceous green to brown, subhyaline at the apex, 5–10-septate, large guttulate.
Kirschsteiniothelia xishuangbannaensis (
Conidia germinating on PDA within 24 hours reaching up to 2 cm diam. after one week at room temperature. Germ tubes generated from both end cells. Colony on PDA, dense, circular, flat or effuse, velvety, from front, brown at the centre and dark brown at edge, from reverse, black to pale brown radiating.
Thailand, Chiang Rai, Mae Fa Luang, Doi Tung, on dead wood of Microcos paniculata, 6 June 2022, N. Afshari 3C2T1R1, living culture
China (
Hevea brasiliensis (
This study introduces three new species and new host records of Kirschsteiniothelia from dead wood from Chiang Rai Province, Thailand, based on morphological and molecular analyses (Figs
This genus is also prone to be highly speciose, given the recent introduction of ten new species (
Furthermore, Kirschsteiniothelia species appear to not have host specificity, as from our results, the same species were found associated with different hosts: K. xishuangbannaensis, previously reported from dead branches of Hevea brasiliensis (
A combined approach should be employed to resolve the taxonomic placement of new species in this genus. This approach should include at least molecular phylogeny and morphological characters (
The findings of this study underscore the importance of integrating multiple types of evidence for the identification and classification of fungal species and they demonstrate the potential for further discoveries within Kirschsteiniothelia. The discovery of new species and host records has significant implications for our understanding of the ecological roles and interactions of this genus. In particular, identifying new host records provides valuable insights into the host range and specificity of Kirschsteiniothelia species, which may help elucidate the mechanisms underlying these interactions. Further research is necessary to fully explore the ecological significance of these findings and determine the potential impacts of Kirschsteiniothelia species on their hosts and ecosystems.
Antonio R. Gomes de Farias thanks Thailand Science Research and Innovation (TSRI) and National Science Research and Innovation Fund (NSRF) (Fundamental Fund: Grant no. 662A16047) entitled “Biodiversity, ecology, and applications of plant litter-inhabiting fungi for waste degradation”. Saranyaphat Boonmee thanks the National Research Council of Thailand (NRCT: Project no. P-19–52624) project entitled “Comparison of diversity and biogeographical distribution of Ascomycetous fungi from two protected areas in Turkey and Thailand” under the Doi Inthanon National Park permission No.0402/2804. The authors would like to thank Dr. Shaun Pennycook for checking and suggesting Latin names of the new taxa, Martin van de Bult, Narong Apichai and the Doi Tung Development Project for sample collection (permission number 7700/17142 with the title “The diversity of saprobic fungi on selected hosts in forest northern Thailand”), Chiang Rai, Thailand.
The authors have declared that no competing interests exist.
No ethical statement was reported.
This study was partially supported by the National Science and Technology Development Agency (NSTDA: Project No. P–19–52624), under the National Park Permission No. 0907.4/8218 and No. 0907.4/19647 and Thailand Science Research and Innovation (TSRI) and National Science Research and Innovation Fund (NSRF) Fundamental Fund grant (Grant no. 662A16047), entitled “Biodiversity, ecology and applications of plant litter-inhabiting fungi for waste degradation”.
Antonio Roberto Gomes de Farias: Conceptualization and design of the study, Funding acquisition, Writing – original draft; Naghmeh Afshari: Methodology, Writing – original draft; Veenavee S. Hittanadurage Silva: Methodology, Writing – original draft; Johnny Louangphan: Methodology, Writing – original draft; Omid Karimi: Writing – original draft; Saranyaphat Boonmee: Funding acquisition, Methodology, Supervision, Writing – revision.
Antonio Roberto Gomes de Farias https://orcid.org/0000-0003-4768-1547
Veenavee S. Hittanadurage Silva https://orcid.org/0000-0001-8921-1370
Omid Karimi https://orcid.org/0000-0001-9652-2222
Saranyaphat Boonmee https://orcid.org/0000-0001-5202-2955
All of the data that support the findings of this study are available in the main text.