Architrypethelium murisporum (Ascomycota, Trypetheliaceae), a remarkable new lichen species from Thailand challenging ascospore septation as an indicator of phylogenetic relationships

Luangsuphabool, Theerapat; Lumbsch, H. Thorsten; Piapukiew, Jittra; Sangvichien, Ek

doi:10.3897/mycokeys.34.23836

Cited by 2 publications

(2 citation statements)

References 25 publications

(44 reference statements)

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“…Both muriform and transverse-septate ascospores are observed among species of the same genus in Graphidaceae (Staiger et al 2006: 769-771). This is the case in other groups of lichens (Lumbsch et al 1997;Nelson et al 2014;Luangsuphabool et al 2018) as well as in non-lichenized taxa (Mugambi and Huhndorf 2009). In the triblidialean fungi, among species of Pseudographis we observe muriform spores in P. elatina and strictly transverse-septate spores in P. pinicola.…”

Section: Ascospore Morphology Of Triblidialean Fungisupporting

confidence: 65%

Placement of Triblidiaceae in Rhytismatales and comments on unique ascospore morphologies in Leotiomycetes (Fungi, Ascomycota)

Karakehian¹,

Quijada²,

Friebes³

et al. 2019

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Triblidiaceae is a family of uncommonly encountered, non-lichenized discomycetes. A recent classification circumscribed the family to include Triblidium (4 spp. and 1 subsp.), Huangshania (2 spp.) and Pseudographis (2 spp. and 1 var.). The apothecia of these fungi are persistent and drought-tolerant; they possess stromatic, highly melanized covering layers that open and close with fluctuations of humidity. Triblidialean fungi occur primarily on the bark of Quercus, Pinaceae and Ericaceae, presumably as saprobes. Though the type species of Huangshania is from China, these fungi are mostly known from collections originating from Western Hemisphere temperate and boreal forests. The higher-rank classification of triblidialean fungi has been in flux due in part to an overemphasis on ascospore morphology. Muriform ascospores are observed in species of Triblidium and in Pseudographiselatina. An intense, dark blue/purple ascospore wall reaction in iodine-based reagents is observed in species of Pseudographis. These morphologies have led, in part, to these genera being shuffled among unrelated taxa in Hysteriaceae (Dothideomycetes, Hysteriales) and Graphidaceae (Lecanoromycetes, Ostropales). Triblidiaceae has been placed within the monofamilial order Triblidiales (affinity Lecanoromycetes). Here, we demonstrate with a three-gene phylogenetic approach that triblidialean fungi are related to taxa in Rhytismatales (Leotiomycetes). We synonymize Triblidiales under Rhytismatales and emend Triblidiaceae to include Triblidium and Huangshania, with Pseudographis placed within Rhytismataceae. A history of Triblidiaceae is provided along with a description of the emended family. We discuss how the inclusion of triblidialean fungi in Rhytismatales brings some rarely observed or even unique ascospore morphologies to the order and to Leotiomycetes.

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Section: Ascospore Morphology Of Triblidialean Fungisupporting

confidence: 65%

Placement of Triblidiaceae in Rhytismatales and comments on unique ascospore morphologies in Leotiomycetes (Fungi, Ascomycota)

Karakehian¹,

Quijada²,

Friebes³

et al. 2019

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“…In 2017, the total Thai lichens were reported to be at least 1292 species and, currently, Trypetheliaceae crustose lichens were found in 44 species. [6][7][8] The genus Marcelaria, 9 especially Marcelaria cumingii, possesses dominant morphological characteristics and is an abundant source of secondary metabolites, comprising anthraquinones and xanthones. [10][11][12] Nevertheless, no chemical data on the cultured mycobiont of this species have been found.…”

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confidence: 99%

Naphthoquinones From Cultured Mycobiont of Marcelaria cumingii (Mont.) and Their Cytotoxicity

Jarupinthusophon

Luangsuphabool

Aree

et al. 2019

Natural Product Communications

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Five naphthoquinones including 4 compounds with new absolute configurations, (–)-2' S-trypethelone methyl ether (1), (–)-2' S-8-methoxytrypethelone methyl ether (2), (–)-(2' S,3' S)-4'-hydroxytrypethelone (3), and (–)-(2' S,3' R)-4'-hydroxy-8-methoxy trypethelone methyl ether (5), together with a known compound, (–)-2' S-trypethelone (4), were isolated from cultured mycobiont of Marcelaria cumingii. These compounds were structurally elucidated by high-resolution mass spectra, nuclear magnetic resonance, circular dichroism, optical rotation, and single-crystal X-ray analysis. The cytotoxicity against several cancer cell lines of the isolated compounds were tested. (–)-2' S-Trypethelone methyl ether (1) showed selective inhibition of HCT116 and A549 cell lines with half-maximal inhibitory concentration values of 0.32 ± 0.03 and 1.05 ± 0.12 µM, respectively. The binding conformation and molecular interactions including the effect of substituent modification were also revealed.

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Architrypethelium murisporum (Ascomycota, Trypetheliaceae), a remarkable new lichen species from Thailand challenging ascospore septation as an indicator of phylogenetic relationships

Cited by 2 publications

References 25 publications

Placement of Triblidiaceae in Rhytismatales and comments on unique ascospore morphologies in Leotiomycetes (Fungi, Ascomycota)

Placement of Triblidiaceae in Rhytismatales and comments on unique ascospore morphologies in Leotiomycetes (Fungi, Ascomycota)

Naphthoquinones From Cultured Mycobiont of Marcelaria cumingii (Mont.) and Their Cytotoxicity

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