<i>Occultifur externus</i> sp. nov., a new species of simple-pored auricularioid heterobasidiomycete from plant litter in Portugal

Sampaio, José Paulo; Bauer, Robert; Begerow, Dominik; Oberwinkler, Franz

doi:10.1080/00275514.1999.12061118

Cited by 12 publications

(17 citation statements)

References 17 publications

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“…The genus Occultifur was originally created to accommodate O. internus and later O. corticiorum, both mycoparasitic species of which cultures and sequence data are not available. Basidial and ultrastructural features of O. externus, a saprobe species found in decomposing plant materials, were remarkably similar to those of O. internus thus supporting a congeneric classification (Sampaio et al 1999;Sampaio and Oberwinkler 2011). Contrary to the other species O. externus is able to develop the sexual cycle on laboratory media.…”

Section: Screening For Extracellular Enzymatic Activitymentioning

confidence: 76%

“…nov. is proposed to accommodate these isolates. This new species differs by eight nucleotide substitutions in the D1/D2 domains and 20 substitutions in the ITS-5.8S region of the LSU rRNA gene from Occultifur externus, its closest described relative, which was isolated from plant litter (Sampaio et al 1999). The new species also differs by 29 and 25 nucleotide substitutions in these regions from two Occultifur species without formal descriptions (Fig.…”

Section: Screening For Extracellular Enzymatic Activitymentioning

confidence: 84%

“…nov., was the most frequently identified species in our study. It was isolated from 13 bromeliad individuals (maximum counts of 2.7 log CFU mL -1 ) and 10 bromeliad individuals (maximum counts of 2.8 log CFU mL -1 ) in the dry and rainy seasons, respectively ( (Sampaio et al 1999;Sampaio and Oberwinkler 2011). Several Cryptococcus species belonging to the Bulleromyces and Luteolus clades, including new species, were isolated with counts ranging from 1.0 to 2.6 log CFU mL -1 in the dry season and from 1.0 to 3.0 log CFU mL -1 in the rainy season (Table 2).…”

Section: Resultsmentioning

confidence: 99%

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The diversity and extracellular enzymatic activities of yeasts isolated from water tanks of Vriesea minarum, an endangered bromeliad species in Brazil, and the description of Occultifur brasiliensis f.a., sp. nov.

Gomes

Safar

Marques

et al. 2014

Antonie van Leeuwenhoek

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The diversity of yeast species collected from the bromeliad tanks of Vriesea minarum, an endangered bromeliad species, and their ability to produce extracellular enzymes were studied. Water samples were collected from 30 tanks of bromeliads living in a rupestrian field site located at Serrada Piedade, Minas Gerais state, Brazil, during both the dry and rainy seasons. Thirty-six species were isolated, representing 22 basidiomycetous and 14 ascomycetous species. Occultifur sp., Cryptococcus podzolicus and Cryptococcus sp. 1 were the prevalent basidiomycetous species. The yeast-like fungus from the order Myriangiales, Candida silvae and Aureobasidium pullulans were the most frequent ascomycetous species. The diversity of the yeast communities obtained between seasons was not significantly different, but the yeast composition per bromeliad was different between seasons. These results suggest that there is significant spatial heterogeneity in the composition of populations of the yeast communities within bromeliad tanks, independent of the season. Among the 352 yeast isolates tested, 282 showed at least one enzymatic activity. Protease activity was the most widely expressed extracellular enzymatic activity, followed by xylanase, amylase, pectinase and cellulase activities. These enzymes may increase the carbon and nitrogen availability for the microbial food web in the bromeliad tank of V. minarum. Sequence analyses revealed the existence of 10 new species, indicating that bromeliad tanks are important sources of new yeasts. The novel species Occultifur brasiliensis, f.a., sp. nov., is proposed to accommodate the most frequently isolated yeast associated with V. minarum. The type strain of O. brasiliensis, f.a., sp. nov. is UFMG-CM-Y375(T) (= CBS 12687(T)). The Mycobank number is MB 809816.

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Section: Screening For Extracellular Enzymatic Activitymentioning

confidence: 76%

Section: Screening For Extracellular Enzymatic Activitymentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

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The diversity and extracellular enzymatic activities of yeasts isolated from water tanks of Vriesea minarum, an endangered bromeliad species in Brazil, and the description of Occultifur brasiliensis f.a., sp. nov.

Gomes

Safar

Marques

et al. 2014

Antonie van Leeuwenhoek

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“…4a, 7a,b;Oberwinkler 1990;Sampaio et al 1999). In other words, within the Pucciniomycotina, poreassociated microbodies and tremelloid haustorial cells occur only in Classicula and Jaculispora.…”

Section: Classiculomycetesmentioning

confidence: 97%

“…Such cells are typical for the mycoparasitic Tremellales of the Agaricomycotina (Hymenomycetes) (Bandoni 1984;), but surprisingly, they also occur in mycoparasitic members of the Pucciniomycotina. Thus, tremelloid haustorial cells are known from species of the pucciniomycotinous genera Classicula, Cystobasidium, Jaculispora, Mycogloea, Occultifur, Spiculogloea and Zygogloea (Bauer 2004;Roberts 1994Roberts , 1996Roberts , 1997Sampaio et al 1999;Oberwinkler 1990; see also below). It is unclear whether the tremelloid haustorial cells occurring in the Tremellales and those of members of the Pucciniomycotina are homologous.…”

Section: Agaricostilbomycetes Spiculogloeales and Kondoaceaementioning

confidence: 97%

The simple-septate basidiomycetes: a synopsis

et al. 2006

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The simple-septate basidiomycetes comprise more than 8,000 species that show a high morphological and ecological heterogeneity. To gain insight in the phylogenetic relationships within this group, we compared several ultrastructural features such as septal pore apparatus, form and behavior of the spindle pole bodies, types of host-parasite interaction, presence or absence of colacosomes, symplechosomes, atractosomes and cystosomes as well as nuclear rDNA sequences coding for small-and large-subunit rRNA. Based on our integrated analysis, we propose a new classification system for the simple-septate basidiomycetes with the subphylum Pucciniomycotina and the

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Phylogenetic distribution of fungal mycosporines within the Pucciniomycotina (Basidiomycota)

Libkind¹,

Moliné²,

Sommaruga³

et al. 2011

Yeast

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The synthesis of the UV Absorbing compounds named mycosporines (MYCs) has been detected in a few basidiomycetous yeast groups. Conspicuous accumulation of mycosporine-glutaminol-glucoside (MGG) in yeasts requires photo-induction and its photoprotective function has been postulated. The distribution of the ability to produce MYCs appeared to be related to the yeast taxonomic affiliation. In view of the potential significance of MYCs in yeast taxonomy, we here studied the distribution of this trait among dimorphic basidiomycetes of the Pucciniomycotina. Of the 94 fungal species (377 strains and 33 genera) tested, almost half were MYC-positive and MGG was the main compound produced. MGG synthesis was observed for representatives of five of seven Pucciniomycotina classes, indicating that this trait is widely distributed in this group. MGG detection proved useful for the differentiation of species of the polyphyletic genera, such as Rhodotorula and Sporobolomyces, that are phylogenetically separated. MGG quantification and UV tolerance studies in Cystobasidiomycetes supported the idea that the habitat of origin of each strains is important in the level of MGG synthesis and that MYCs have a photoprotective function in yeasts. The taxonomic value of this trait in fungal systematics is discussed.

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Occultifur externus sp. nov., a new species of simple-pored auricularioid heterobasidiomycete from plant litter in Portugal

Cited by 12 publications

References 17 publications

The diversity and extracellular enzymatic activities of yeasts isolated from water tanks of Vriesea minarum, an endangered bromeliad species in Brazil, and the description of Occultifur brasiliensis f.a., sp. nov.

The diversity and extracellular enzymatic activities of yeasts isolated from water tanks of Vriesea minarum, an endangered bromeliad species in Brazil, and the description of Occultifur brasiliensis f.a., sp. nov.

The simple-septate basidiomycetes: a synopsis

Phylogenetic distribution of fungal mycosporines within the Pucciniomycotina (Basidiomycota)

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