Commentary on a new major reference work Yeasts: Characteristics and Identification, 3rd edn. By J. A. Barnett, R. W. Payne and D. Yarrow. Cambridge University Press: Cambridge. �200.00, ix+1139 pp., 1376 photomicrographs by Linda Barnett. ISBN 0 521 57396 3. Published 25 May 2000.

Barnett, James A.

doi:10.1002/1097-0061(200011)16:15<1445::aid-yea639>3.0.co;2-0

Cited by 144 publications

(236 citation statements)

References 4 publications

(4 reference statements)

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“…These strains deviated from strains of this species by forming creeping pellicles. The physiological data (Table II) agree with the description given by Kurtzman (1998) and Barnett et al (2000), but sequencing of 26S rDNA response. All strains of P. guillermondii studied by Barnett et al (2000) and the 3 strains isolated from rotting mushrooms had many characteristics in common: all assimilated D-glucose, D-galactose, sucrose, maltose, α,α´-trehalose, glycerol, citrate and n-hexadecane as the sole carbon source, and ethanamine, L-lysine and cadaverine as the sole nitrogen source, and tolerated 10 % NaCl, but none assimilated lactose, erythritol, myo-inositol, showed that they belong to different species.…”

Section: Resultssupporting

confidence: 87%

“…The strains were examined for morphological and physiological properties using standard yeast identification methods (Yarrow 1998;Barnett et al 2000). For identification, the BioloMICS programm provided by Dr. V. Robert (Centraalbureau voor Schimmelcultures (CBS), Utrecht, The Netherlands) was used; it is available on internet page: www.cbs.knaw.nl .…”

Section: Methodsmentioning

confidence: 99%

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The yeast flora of some decaying mushrooms on trunks of living trees

Middelhoven

2004

Folia Microbiol

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ABSTRACT. Several ascomycetous and basidiomycetous yeasts were isolated from rotten mushrooms on the trunks of beech and tamarisk trees. One strain, identified as the novel species Cryptococcus allantoinivorans, assimilated allantoin as the sole carbon source. Phylogenetically it belongs to the C. laurentii complex, Papiliotrema bandonii being the closest relative. Some ascomycetous strains could not be distinguished from Pichia guillermondii, but deviated considerably in rDNA sequences. In addition to these species, both decaying mushrooms were inhabited by more common species, viz. Candida albicans, C. saitoana, Rhodotorula mucilaginosa, Trichosporon asahii, T. multisporum and T. porosum. The basidiomycetous yeasts, except R. mucilaginosa, assimilated some polysaccharides of plant origin.Several yeast species assimilate a great variety of carbon sources in addition to those used for yeast identification and taxonomy (Middelhoven et al. 1985(Middelhoven et al. , 1991(Middelhoven et al. , 2001(Middelhoven et al. , 2004aMiddelhoven and Kurtzman 2003). Uric acid is one of these nonconventional substrates (Middelhoven et al. 1983). Like other aerobic microorganisms, ascomycetous and a basidiomycetous yeast species degrade uric acid by oxidation to allantoin that, in three successive hydrolytic steps, is converted into 1 mol glyoxylate and 2 mol urea (Middelhoven et al. 1983). Surprisingly, most yeast species assimilating uric acid as the sole carbon source failed to grow at the expense of allantoin, in spite of equal energetic value. Middelhoven et al. (1985) demonstrated that of 14 ascomycetous and basidiomycetous yeast species, growing on uric acid as the sole carbon source, only Stephanoascus ciferrii M.TH. SMITH et al. assimilated allantoin. It is wide-spread in nature and is a source of nitrogen for many yeast species. Nevertheless, several attempts to isolate yeasts from soil by enrichment culture on allantoin as the sole carbon source failed. In the present study such yeasts were looked for in another habitat, viz. decaying mushrooms. It has been known for a long time that mushrooms contain allantoin (Brunel 1931(Brunel , 1936. Mushrooms also contain chitin as a constituent of the fungal cell wall. Assimilation of this polysaccharide by yeasts has never been reported. Attempts were made to isolate such yeasts from decaying mushrooms.The present study was not restricted to isolation of yeasts with characteristic biochemical abilities. In addition, several yeast species present in decaying mushrooms were identified as representatives of wellknown species. However, some very rare species and some strains physiologically similar to Pichia guillermondii but belonging to undescribed species were also isolated. The basidiomycetous yeasts were tested for growth on several polysaccharides of plant origin. MATERIALS AND METHODSIsolation of the strains. The rotting mushrooms sampled were Hericium erinaceus (BULL.:FR.)PERS. on the trunk of a beech tree (Fagus sylvatica L.) in Wageningen (The Netherlands) September 2000,...

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Section: Resultssupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

The yeast flora of some decaying mushrooms on trunks of living trees

Middelhoven

2004

Folia Microbiol

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“…For most pathogenic Cryptococcus species, sexual spores are only known to be produced in the laboratory and have not been found in nature or in clinical samples (Velagapudi et al 2009); however, Nielsen et al (2007) found that Cryptococcus neoformans can mate on pigeon guano. To our knowledge, no extremophilic members of the genus Naganishia are known to have a sexual stage (Barnett et al 2000), but this could just be because the source habitat (reservoir) for this group has not yet been discovered. There is a chance that the extremophilic members of the genus Naganishia are being dispersed from some as yet undiscovered source habitat where sexual reproduction can occur.…”

Section: Global Aerial Dispersal Of Naganishia Speciesmentioning

confidence: 99%

“…While these values are respectable, they do not indicate that they are halophilic and put these strains at the lower range of halotolerant yeasts. For example, Corte et al (2006) screened 27 halotolerant yeast species that can tolerate 10% NaCl and found that growth ceased at concentrations of between 1.7 and 3.8 M, with an average of 2.5 M. In addition, none of the Antarctic Naganishia species can grow in the presence of 10% NaCl, whereas about 30% of the non-Antarctic species listed in Barnett et al (2000) could grow in the presence of 10% NaCl.…”

Section: Ecological Tolerances Of Naganishiamentioning

confidence: 99%

“…Of particular interest is the work of Vimercati et al (2016) who showed that the N. friedmannii isolate from Volcán Llullaillaco could metabolise 74% of 27 organic compounds commonly used for classifying yeast. In contrast, N. friedmannii and N. consortionis from Antarctica used 48 and 30% of the same 27 organic compounds, respectively (Barnett et al 2000), perhaps indicating that the Antarctic isolates have a narrower metabolic niche than the Llullaillaco isolate. The metabolic versatility of the Llullaillaco isolate may indicate that this organism is an opportunitroph as defined by Polz et al (2006), that is, an organism capable of “exploiting spatially and temporally variable resources”.…”

Section: Ecological Tolerances Of Naganishiamentioning

confidence: 99%

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ANaganishiain high places: functioning populations or dormant cells from the atmosphere?

et al. 2017

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Here, we review the current state of knowledge concerning high-elevation members of the extremophilic Cryptococcus albidus clade (now classified as the genus Naganishia). These fungi dominate eukaryotic microbial communities across the highest elevation, soil-like material (tephra) on volcanoes such as Llullaillaco, Socompa, and Saírecabur in the Atacama region of Chile, Argentina, and Bolivia. Recent studies indicate that Naganishia species are among the most resistant organisms to UV radiation, and a strain of N. friedmannii from Volcán Llullaillaco is the first organism that is known to grow during the extreme, diurnal freeze-thaw cycles that occur on a continuous basis at elevations above 6000 m.a.s.l. in the Atacama region. These and other extremophilic traits discussed in this review may serve a dual purpose of allowing Naganishia species to survive long-distance transport through the atmosphere and to survive the extreme conditions found at high elevations. Current evidence indicates that there are frequent dispersal events between high-elevation volcanoes of Atacama region and the Dry Valleys of Antarctica via “Rossby Wave” merging of the polar and sub-tropical jet streams. This dispersal hypothesis needs further verification, as does the hypothesis that Naganishia species are flexible “opportunitrophs” that can grow during rare periods of water (from melting snow) and nutrient availability (from Aeolian inputs) in one of the most extreme terrestrial habitats on Earth.

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Genome‐scale metabolic model of methylotrophic yeast Pichia pastoris and its use for in silico analysis of heterologous protein production

Sohn

Graf

Kim

et al. 2010

Biotechnology Journal

114

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The methylotrophic yeast Pichia pastoris has gained much attention during the last decade as a platform for producing heterologous recombinant proteins of pharmaceutical importance, due to its ability to reproduce post-translational modification similar to higher eukaryotes. With the recent release of the full genome sequence for P. pastoris, in-depth study of its functions has become feasible. Here we present the first reconstruction of the genome-scale metabolic model of the eukaryote P. pastoris type strain DSMZ 70382, PpaMBEL1254, consisting of 1254 metabolic reactions and 1147 metabolites compartmentalized into eight different regions to represent organelles. Additionally, equations describing the production of two heterologous proteins, human serum albumin and human superoxide dismutase, were incorporated. The protein-producing model versions of PpaMBEL1254 were then analyzed to examine the impact on oxygen limitation on protein production.

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Commentary on a new major reference work Yeasts: Characteristics and Identification, 3rd edn. By J. A. Barnett, R. W. Payne and D. Yarrow. Cambridge University Press: Cambridge. �200.00, ix+1139 pp., 1376 photomicrographs by Linda Barnett. ISBN 0 521 57396 3. Published 25 May 2000.

Cited by 144 publications

References 4 publications

The yeast flora of some decaying mushrooms on trunks of living trees

The yeast flora of some decaying mushrooms on trunks of living trees

ANaganishiain high places: functioning populations or dormant cells from the atmosphere?

Genome‐scale metabolic model of methylotrophic yeast Pichia pastoris and its use for in silico analysis of heterologous protein production

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