Epulorhiza amonilioides sp. nov.: a new anamorphic species of orchid mycorrhiza from Brazil

Almeida, Paulo Ricardo Machado de; Berg, Cássio van den; Goés-Neto, Aristóteles

doi:10.13102/neod.71.1

Cited by 10 publications

(8 citation statements)

References 10 publications

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“…Six Serendipita OTUs (LC602788-LC602792) assigned to Sebacinaceae were divided into two clades inside Serendipitaceae: two OTUs were related to Serendipita herbamans (NR144842), an endophyte of Bistorta vivipara (Polygonaceae) (Riess et al 2014) in one clade, and the other four OTUs were close to S. indica (NR166023, KF061284, MH863568), a well-known endophyte occurring in several flowering plants (Weiß et al 2016). Two Tulasnella OTUs (LC602793 and LC602794) were related to T. irregularis (EU218889) and T. amonilioides (JF907601 and JF907599), mycobionts first (Warcup and Talbot 1980;Almeida et al 2014).…”

Section: Identification Of Rhizoctonia-like Fungal Otusmentioning

confidence: 99%

Orchid mycorrhizal fungi and ascomycetous fungi in epiphytic Vanda falcata roots occupy different niches during growth and development

Pujasatria

Nishiguchi²,

Miura

et al. 2022

Mycorrhiza

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Epiphytic orchids are commonly found in exposed environments, which plausibly lead to different root fungal community structures from terrestrial orchids. Until recently, no studies have been conducted to show the fungal community structure during the growth of a photosynthetic and epiphytic orchid in its natural growing state. In this study, the Vanda falcata (commonly known as Neofinetia falcata), one of Japan's ornamental orchids, was used to characterize the fungal community structure at different developmental stages. Amplicon sequencing analysis showed that all development stages contain a similar fungal community: Ascomycota dominates half of the community while one-third of the community is Basidiomycota. Rhizoctonia-like fungi, a term to group the most common basidiomycetous fungi that form orchid mycorrhiza, exist even in a smaller portion (around a quarter) compared to other Basidiomycota members. While ascomycetous fungi exhibit pathogenicity, two Ceratobasidium strains isolated from young and adult plants could initiate seed germination in vitro. It was also found that the colonization of mycorrhizal fungi was concentrated in the lower part of the root where it directly attaches to the phorophyte bark, while ascomycetous fungi were distributed in the velamen but never colonized cortical cells.Additionally, lower root parts attached to the bark have denser exodermal passage cells, and these cells were colonized only by mycorrhizal fungi that further infiltrated the cortical area.Therefore, we propose that physical regulation of fungal entry to partition the ascomycetes and mycorrhizal fungi results in the balanced mycorrhizal symbiosis in this orchid.

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Section: Identification Of Rhizoctonia-like Fungal Otusmentioning

confidence: 99%

Orchid mycorrhizal fungi and ascomycetous fungi in epiphytic Vanda falcata roots occupy different niches during growth and development

Pujasatria

Nishiguchi²,

Miura

et al. 2022

Mycorrhiza

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show abstract

“…Two Tulasnella OTUs (LC602793 and LC602794) were related to T. irregularis (EU218889) and T. amonilioides (JF907601 and JF907599), mycobionts first reported in Dendrobium affine (syn. dicuphum ) and Encyclia dichroma , respectively (Warcup and Talbot 1980; Almeida et al 2014).…”

Section: Resultsmentioning

confidence: 99%

Regulation of balanced root fungal community of Vanda falcata (Orchidaceae) by partitioning its mycorrhizal fungi and ascomycetous fungi across growth and development

Pujasatria

Nishiguchi²,

Miura

et al. 2022

Preprint

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Epiphytic orchids are commonly found in exposed environments, which plausibly lead to different root fungal community structures from terrestrial orchids. Until recently, no studies have been conducted to show the fungal community structure during the growth of a photosynthetic and epiphytic orchid in its natural growing state. In this study, the Vanda falcata (commonly known as Neofinetia falcata), one of Japan's ornamental orchids, was used to characterize the fungal community structure at different developmental stages. Amplicon sequencing analysis showed that all development stages contain a similar fungal community: Ascomycota dominates half of the community while one-third of the community is Basidiomycota. Rhizoctonia-like fungi, a term to group the most common basidiomycetous fungi that form orchid mycorrhiza, exist even in a smaller portion (around a quarter) compared to other Basidiomycota members. While ascomycetous fungi exhibit pathogenicity, two Ceratobasidium strains isolated from young and adult plants could initiate seed germination in vitro. It was also found that the colonization of mycorrhizal fungi was concentrated in the lower part of the root where it directly attaches to the phorophyte bark, while ascomycetous fungi were distributed in the velamen but never colonized cortical cells. Additionally, lower root parts attached to the bark have denser exodermal passage cells, and these cells were colonized only by mycorrhizal fungi that further infiltrated the cortical area. Therefore, we propose that physical regulation of fungal entry to partition the ascomycetes and mycorrhizal fungi results in the balanced mycorrhizal symbiosis in this orchid.

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“…Comparatively few exemplars are studied for each class and the character is rarely used for genus or species level classifications, which tend to be supported by DNA sequencing ( e.g. Almeida et al . 2014 , Linde et al .…”

Section: Resultsmentioning

confidence: 99%

“…1997 , Dearnaley et al . 2012 , Almeida et al 2014 , Linde et al 2017 , Oberwinkler et al . 2017 , Fujimori et al .…”

Section: Discussionunclassified

“…2009). Using mito 28S, Almeida et al (2014) showed that the species formerly included in the asexual genus Epulorhiza, namely T. amonilioides , T. epiphytica , T. albertaensis and T. anaticula, do not form their own distinct clade, but are distributed across Tulasnella . In their phylogenetic analysis, strains identified as the type species of Epulorhiza , E. repens or its sexual morph T. calospora, are polyphyletic, and most of the clades represent unnamed endophytes isolated from orchid roots.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Taxonomy and phylogeny of the basidiomycetous hyphomycete genus Hormomyces

Mack

Assabgui

Seifert

2021

Fungal Systematics and Evolution

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The taxonomy of the genus Hormomyces, typified by Hormomyces aurantiacus, which based on circumstantial evidence was long assumed to be the hyphomycetous asexual morph of Tremella mesenterica (Tremellales, Tremellomycetes) or occasionally Dacrymyces (Dacrymycetales, Dacrymycetes), is revised. Phylogenies based on the three nuc rDNA markers [internal transcribed spacers (ITS), 28S large ribosomal subunit nrDNA (28S) and 18S small ribosomal subunit nrDNA (18S)], based on cultures from Canada and the United States, suggest that the genus is synonymous with Tulasnella (Cantharellales, Agaricomycetes) rather than Tremella or Dacrymyces. Morphological studies of 38 fungarium specimens of Hormomyces, including the type specimens of H. callorioides, H. fragiformis, H. paridiphilus and H. peniophorae and examination of the protologues of H. abieticola, H. aurantiacus and H. pezizoideus suggest that H. callorioides and H. fragiformis are conspecific with H. aurantiacus while the remaining species are unlikely to be related to Tulasnella. The conidial chains produced by H. aurantiacus are similar to monilioid cells of asexual morphs of Tulasnella species formerly referred to the genus Epulorhiza. The new combination Tulasnella aurantiaca is proposed and the species is redescribed, illustrated and compared with similar fungi. The ecological niche of T. aurantiaca and its possible relationship to orchid root endophytes is discussed. A key to asexual genera with similar conidium ontogeny to T. aurantiaca is provided.

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Epulorhiza amonilioides sp. nov.: a new anamorphic species of orchid mycorrhiza from Brazil

Cited by 10 publications

References 10 publications

Orchid mycorrhizal fungi and ascomycetous fungi in epiphytic Vanda falcata roots occupy different niches during growth and development

Orchid mycorrhizal fungi and ascomycetous fungi in epiphytic Vanda falcata roots occupy different niches during growth and development

Regulation of balanced root fungal community of Vanda falcata (Orchidaceae) by partitioning its mycorrhizal fungi and ascomycetous fungi across growth and development

Taxonomy and phylogeny of the basidiomycetous hyphomycete genus Hormomyces

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