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Jianlong Jim Zhou – One of the best experts on this subject based on the ideXlab platform.

  • Characterization of oleaginous yeasts revealed two novel species: Trichosporon cacaoliposimilis sp. nov. and Trichosporon oleaginosus sp. nov.
    Mycologia, 2011
    Co-Authors: Pushpa Gujjari, Kendra Coumes, Jianlong Jim Zhou
    Abstract:

    Two new species in the anamorphic basidiomycetous genus Trichosporon (Tremellomycetes, Agaricomycotina) were uncovered in a DNA sequence-based molecular analysis of oleaginous yeasts maintained in the ATCC Mycology Collection. One yeast is named as Trichosporon cacaoliposimilis sp. nov. for its capability of synthesizing and accumulating a large amount of lipids having a composition equivalent to that of natural cacao butter. The type strain is ATCC 20505T, originally deposited as Trichosporon sp. The other can use food industry wastes and agricultural byproducts as the substrate for growth and accumulation of a high level of oil and accordingly is named Trichosporon oleaginosus sp. nov. The type strain is ATCC 20509T, previously identified as Cryptococcus curvatus. Molecular phylogenetic analyses indicate that T. cacaoliposimilis is a novel taxon in the Gracile clade of the genus, close to T. gracile and T. dulcitum, and that T. oleaginosus belongs to the Cutaneum clade, with T. jirovecii as the closest …

  • Characterization of oleaginous yeasts revealed two novel species: Trichosporon cacaoliposimilis sp. nov. and Trichosporon oleaginosus sp. nov.
    Mycologia, 2011
    Co-Authors: Pushpa Gujjari, Kendra Coumes, Sung-oui Suh, Jianlong Jim Zhou
    Abstract:

    Two new species in the anamorphic basidiomycetous genus Trichosporon (Tremellomycetes, Agaricomycotina) were uncovered in a DNA sequence-based molecular analysis of oleaginous yeasts maintained in …

Melissa Fontes Landell – One of the best experts on this subject based on the ideXlab platform.

  • Vishniacozyma alagoana sp. nov. a tremellomycetes yeast associated with plants from dry and rainfall tropical forests.
    International journal of systematic and evolutionary microbiology, 2020
    Co-Authors: Ciro R. Félix, Dayse Alessandra Andrade, James Henrique Almeida, Hector Mauricio Casanova Navarro, Jack W. Fell, Melissa Fontes Landell
    Abstract:

    Plants are important reservoirs of described and undescribed species of yeast. During a study of yeasts associated with bromeliads from the Northeast region of Brazil (collected in 2013-2017), analysis of the D1/D2 domain of the LSU rRNA and internal transcribed spacer (ITS) region identified eleven strains of yeasts as representing an unknown species of the genus Vishniacozyma. The species may have a diverse habitat in Brazil as a strain was collected from a flowering plant (Acanthaceae) in 1994. As a consequence, we propose Vishniacozyma alagoana sp. nov. as a member of the tremellomycetes yeasts (Agaricomycotina, Basidiomycota). Vishniacozyma alagoana sp. nov. was found in Atlantic Forest (a tropical rainforest) and the Caatinga (a seasonally dry tropical forest) associated with bromeliads in northeast and southeastern Brazil. The proposed novel species is related to Vishniacozyma taibaiensis and distinguished by eight nucleotide substitutions in the D1/D2 domain and seventeen in the ITS region. In addition, Vishniacozyma alagoana sp. nov. differs from V. taibaiensis by the ability to assimilate ribitol. The holotype is CBS 15966T.

  • Carlosrosaea hohenbergiae sp. nov. and Carlosrosaea aechmeae sp. nov., two tremellaceous yeasts isolated from bromeliads in north-eastern Brazil.
    International journal of systematic and evolutionary microbiology, 2017
    Co-Authors: Ciro R. Félix, Leonardo Broetto, Hector Mauricio Casanova Navarro, Gustavo Vasconcelos Bastos Paulino, Melissa Fontes Landell
    Abstract:

    Yeast surveys associated with different bromeliads in north-eastern Brazil led to the proposal of two novel yeast species, Carlosrosaea hohenbergiae sp. nov. and Carlosrosaea aechmeae sp. nov., belonging to the Tremellales clade (Agaricomycotina, Basidiomycota). Analysis of the sequences of the internal transcribed spacer (ITS) region and D1/D2 domain of the LSU rRNA gene suggested an affinity with a phylogenetic lineage that includes recently reclassified Carlosrosaeavrieseae. Six isolates of the novel species were obtained from different bromeliad species collected in three Atlantic Forest fragments in Alagoas state, Brazil. Ca. hohenbergiae sp. nov. differs by 69 and 12 nucleotide substitutions in the ITS and D1/D2 domain, respectively, from Ca. vrieseae. The type strain is UFMG-CM-Y405T (=BSB 34T=CBS 14563T), Mycobank 819227. Ca. aechmeae sp. nov. is represented by one strain isolated from Aechmea constantinii leaves. Ca. aechmeae sp. nov. differs from the related species Ca. hohenbergiae and Ca. vrieseae by 36 and 65 nucleotide substitutions, respectively, in the ITS region and by 12 and 15 nucleotide substitutions in the D1/D2 domain, respectively. The type strain of Ca. aechmeae sp. nov. is UFMG-CM-Y6095T (=BM 94T=CBS 14578), Mycobank 819228.

  • Bullera vrieseae sp. nov., a tremellaceous yeast species isolated from bromeliads.
    International journal of systematic and evolutionary microbiology, 2015
    Co-Authors: Melissa Fontes Landell, Luciana R. Brandão, Jesus P. Ramos, Silvana V. B. Safar, Leonardo Broetto, Ciro R. Félix, Fátima De Cássia Oliveira Gomes, Ana Raquel O. Santos, Danielle Machado Pagani, Tamí Mott
    Abstract:

    Two independent surveys of yeasts associated with different bromeliads in different Brazilian regions led to the proposal of a novel yeast species, Bullera vrieseae sp. nov., belonging to the Tremellales clade (Agaricomycotina, Basidiomycota). Analysis of the sequences in the internal transcribed spacer (ITS) region and D1/D2 domain of the LSU rRNA gene suggested affinity to a phylogenetic lineage that includes Bullera miyagiana and Bullera sakaeratica. Six isolates of the novel species were obtained from different bromeliads and regions in Brazil. Sequence analysis of the D1/D2 domains of the large subunit of the rRNA gene showed that the novel species differs from B. miyagiana and B. sakaeratica by 85 and 64 nt substitutions, respectively and by more than 75 nt substitutions in the ITS region. Phenotypically, Bullera vrieseae sp. nov. can be distinguished from both species based on the assimilation of meso-erythritol, which was negative for B. vrieseae sp. nov. but positive for the others, assimilation of d-glucosamine, which was positive for B. vrieseae sp. nov. but negative for B. miyagiana and of l-sorbose, which was negative for B. vrieseae sp. nov. but positive for B. sakaeratica. The novel species Bullera vrieseae sp. nov. is proposed to accommodate these isolates. The type strain of Bullera vrieseae sp. nov. is UFMG-CM-Y379T (BRO443T; ex-type CBS 13870T).

Pushpa Gujjari – One of the best experts on this subject based on the ideXlab platform.

  • Characterization of oleaginous yeasts revealed two novel species: Trichosporon cacaoliposimilis sp. nov. and Trichosporon oleaginosus sp. nov.
    Mycologia, 2011
    Co-Authors: Pushpa Gujjari, Kendra Coumes, Jianlong Jim Zhou
    Abstract:

    Two new species in the anamorphic basidiomycetous genus Trichosporon (Tremellomycetes, Agaricomycotina) were uncovered in a DNA sequence-based molecular analysis of oleaginous yeasts maintained in the ATCC Mycology Collection. One yeast is named as Trichosporon cacaoliposimilis sp. nov. for its capability of synthesizing and accumulating a large amount of lipids having a composition equivalent to that of natural cacao butter. The type strain is ATCC 20505T, originally deposited as Trichosporon sp. The other can use food industry wastes and agricultural byproducts as the substrate for growth and accumulation of a high level of oil and accordingly is named Trichosporon oleaginosus sp. nov. The type strain is ATCC 20509T, previously identified as Cryptococcus curvatus. Molecular phylogenetic analyses indicate that T. cacaoliposimilis is a novel taxon in the Gracile clade of the genus, close to T. gracile and T. dulcitum, and that T. oleaginosus belongs to the Cutaneum clade, with T. jirovecii as the closest …

  • Characterization of oleaginous yeasts revealed two novel species: Trichosporon cacaoliposimilis sp. nov. and Trichosporon oleaginosus sp. nov.
    Mycologia, 2011
    Co-Authors: Pushpa Gujjari, Kendra Coumes, Sung-oui Suh, Jianlong Jim Zhou
    Abstract:

    Two new species in the anamorphic basidiomycetous genus Trichosporon (Tremellomycetes, Agaricomycotina) were uncovered in a DNA sequence-based molecular analysis of oleaginous yeasts maintained in …

Kendra Coumes – One of the best experts on this subject based on the ideXlab platform.

  • Characterization of oleaginous yeasts revealed two novel species: Trichosporon cacaoliposimilis sp. nov. and Trichosporon oleaginosus sp. nov.
    Mycologia, 2011
    Co-Authors: Pushpa Gujjari, Kendra Coumes, Jianlong Jim Zhou
    Abstract:

    Two new species in the anamorphic basidiomycetous genus Trichosporon (Tremellomycetes, Agaricomycotina) were uncovered in a DNA sequence-based molecular analysis of oleaginous yeasts maintained in the ATCC Mycology Collection. One yeast is named as Trichosporon cacaoliposimilis sp. nov. for its capability of synthesizing and accumulating a large amount of lipids having a composition equivalent to that of natural cacao butter. The type strain is ATCC 20505T, originally deposited as Trichosporon sp. The other can use food industry wastes and agricultural byproducts as the substrate for growth and accumulation of a high level of oil and accordingly is named Trichosporon oleaginosus sp. nov. The type strain is ATCC 20509T, previously identified as Cryptococcus curvatus. Molecular phylogenetic analyses indicate that T. cacaoliposimilis is a novel taxon in the Gracile clade of the genus, close to T. gracile and T. dulcitum, and that T. oleaginosus belongs to the Cutaneum clade, with T. jirovecii as the closest …

  • Characterization of oleaginous yeasts revealed two novel species: Trichosporon cacaoliposimilis sp. nov. and Trichosporon oleaginosus sp. nov.
    Mycologia, 2011
    Co-Authors: Pushpa Gujjari, Kendra Coumes, Sung-oui Suh, Jianlong Jim Zhou
    Abstract:

    Two new species in the anamorphic basidiomycetous genus Trichosporon (Tremellomycetes, Agaricomycotina) were uncovered in a DNA sequence-based molecular analysis of oleaginous yeasts maintained in …

Alvaro Fonseca – One of the best experts on this subject based on the ideXlab platform.

  • dioszegia antarctica sp nov and dioszegia cryoxerica sp nov psychrophilic basidiomycetous yeasts from polar desert soils in antarctica
    International Journal of Systematic and Evolutionary Microbiology, 2010
    Co-Authors: Laurie B Connell, Regina S Redman, Russel Rodriguez, Anne Barrett, Melissa Iszard, Alvaro Fonseca
    Abstract:

    During a survey of the culturable soil fungal population in samples collected in Taylor Valley, South Victoria Land, Antarctica, 13 basidiomycetous yeast strains with orange-coloured colonies were isolated. Phylogenetic analyses of internal transcribed spacer (ITS) and partial LSU rRNA gene sequences showed that the strains belong to the Dioszegia clade of the Tremellales (Tremellomycetes, Agaricomycotina), but did not correspond to any of the hitherto recognized species. Two novel species, Dioszegia antarctica sp. nov. (type strain ANT-03-116T =CBS 10920T =PYCC 5970T) and Dioszegia cryoxerica sp. nov. (type strain ANT-03-071T =CBS 10919T =PYCC 5967T), are described to accommodate ten and three of these strains, respectively. Analysis of ITS sequences demonstrated intrastrain sequence heterogeneity in D. cryoxerica. The latter species is also notable for producing true hyphae with clamp connections and haustoria. However, no sexual structures were observed. The two novel species can be considered obligate psychrophiles, since they failed to grow above 20 °C and grew best between 10 and 15 °C.

  • Dioszegia antarctica sp. nov. and Dioszegia cryoxerica sp. nov., psychrophilic basidiomycetous yeasts from polar desert soils in Antarctica.
    International journal of systematic and evolutionary microbiology, 2009
    Co-Authors: Laurie B Connell, Russel Rodriguez, Anne Barrett, Melissa Iszard, Regina Redman, Alvaro Fonseca
    Abstract:

    During a survey of the culturable soil fungal population in samples collected in Taylor Valley, South Victoria Land, Antarctica, 13 basidiomycetous yeast strains with orange-coloured colonies were isolated. Phylogenetic analyses of internal transcribed spacer (ITS) and partial LSU rRNA gene sequences showed that the strains belong to the Dioszegia clade of the Tremellales (Tremellomycetes, Agaricomycotina), but did not correspond to any of the hitherto recognized species. Two novel species, Dioszegia antarctica sp. nov. (type strain ANT-03-116(T) =CBS 10920(T) =PYCC 5970(T)) and Dioszegia cryoxerica sp. nov. (type strain ANT-03-071(T) =CBS 10919(T) =PYCC 5967(T)), are described to accommodate ten and three of these strains, respectively. Analysis of ITS sequences demonstrated intrastrain sequence heterogeneity in D. cryoxerica. The latter species is also notable for producing true hyphae with clamp connections and haustoria. However, no sexual structures were observed. The two novel species can be considered obligate psychrophiles, since they failed to grow above 20 degrees C and grew best between 10 and 15 degrees C.

  • Cryptococcus bromeliarum sp. nov., an orange-coloured basidiomycetous yeast isolated from bromeliads in Brazil.
    INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY, 2009
    Co-Authors: Melissa Fontes Landell, Marilene Henning Vainstein, Alvaro Fonseca, João Inácio, Patricia Valente
    Abstract:

    During a survey of yeasts associated with the phylloplane of several bromeliad species in Itapua Park in southern Brazil, we isolated four orange-coloured strains which were found to represent a novel anamorphic tremellaceous (Tremellales, Agaricomycotina, Basidiomycota) yeast species, Cryptococcus bromeliarum sp. nov. (type strain BI20T =CBS 10424T =NRRL Y-48112T). PCR-fingerprinting profiles of the four strains with primers M13 and (GTG)5 were almost identical, which suggested conspecificity among the isolates. On the basis of D1/D2 26S rDNA sequence analysis, C. bromeliarum is phylogenetically closely related to other orange-coloured Cryptococcus species, namely Cryptococcus armeniacus, C. amylolyticus, C. tibetensis and C. cistialbidi, but differed from these species by at least six nucleotide substitutions and was thus considered a separate species. Physiological differences from C. armeniacus, C. amylolyticus and C. cistialbidi included the inability of C. bromeliarum to assimilate citrate and to form starch-like compounds. Differentiation from C. tibetensis can be achieved by the ability of the latter to assimilate ethylamine.