Chapter 12. Yeasts in the Genus Rhodotorula Recovered from the Greenland Ice Sheet

Starmer, William T.; Fell, Jack W.; Catranis, Catherine M.; Aberdeen, Virginia; Ma, Li; Zhou, Shuang; Rogers, Scott O.; Castello, John D.

doi:10.1515/9781400880188-016

Cited by 21 publications

(19 citation statements)

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“…The taxon that was most often isolated was the genus Rhodotorula (Table 1, Figure 8), as was the case in our previous studies of Greenland and Antarctic ice core sections [5,12]. Members of this genus are hardy and adaptable, and have been isolated frequently from polar regions [12]. All of the Rhodotorula isolates were pigmented (shades of yellow, orange, pink and red), which might be important to survival in cold environments, and might explain their abundance in the cores analyzed [38].…”

Section: Resultssupporting

confidence: 54%

“…However, in all cases, the species, as indicated by the rRNA sequences, differed from one pole to the other (Table 1, Figure 6, Figure 7, Figure 8). The taxon that was most often isolated was the genus Rhodotorula (Table 1, Figure 8), as was the case in our previous studies of Greenland and Antarctic ice core sections [5,12]. Members of this genus are hardy and adaptable, and have been isolated frequently from polar regions [12].…”

Section: Resultsmentioning

confidence: 62%

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Microbial Analyses of Ancient Ice Core Sections from Greenland and Antarctica

Knowlton

Veerapaneni

D’Elia

et al. 2013

Biology

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Ice deposited in Greenland and Antarctica entraps viable and nonviable microbes, as well as biomolecules, that become temporal atmospheric records. Five sections (estimated to be 500, 10,500, 57,000, 105,000 and 157,000 years before present, ybp) from the GISP2D (Greenland) ice core, three sections (500, 30,000 and 70,000 ybp) from the Byrd ice core, and four sections from the Vostok 5G (Antarctica) ice core (10,500, 57,000, 105,000 and 105,000 ybp) were studied by scanning electron microscopy, cultivation and rRNA gene sequencing. Bacterial and fungal isolates were recovered from 10 of the 12 sections. The highest numbers of isolates were found in ice core sections that were deposited during times of low atmospheric CO2, low global temperatures and low levels of atmospheric dust. Two of the sections (GISP2D at 10,500 and 157,000 ybp) also were examined using metagenomic/metatranscriptomic methods. These results indicated that sequences from microbes common to arid and saline soils were deposited in the ice during a time of low temperature, low atmospheric CO2 and high dust levels. Members of Firmicutes and Cyanobacteria were the most prevalent bacteria, while Rhodotorula species were the most common eukaryotic representatives. Isolates of Bacillus, Rhodotorula, Alternaria and members of the Davidiellaceae were isolated from both Greenland and Antarctica sections of the same age, although the sequences differed between the two polar regions.

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Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 62%

Microbial Analyses of Ancient Ice Core Sections from Greenland and Antarctica

Knowlton

Veerapaneni

D’Elia

et al. 2013

Biology

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“…However, their nutritional versatility combined with a simplified lifestyle and the evolution of different physiological adaptations have allowed the colonization of a wide range of habitats, either terrestrial or aquatic. The versatility and resilience of yeasts even allows the colonization of extreme environments like, for example, cold habitats (Starmer et al 2005), the deep sea (Bass et al 2007;Nagahama et al 2001), and marine hydrothermal vents (Gadanho and Sampaio 2005).…”

Section: Introductionmentioning

confidence: 99%

The dynamics of the yeast community of the Tagus river estuary: testing the hypothesis of the multiple origins of estuarine yeasts

Coelho

Almeida

Martins

et al. 2010

Antonie van Leeuwenhoek

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Yeasts are common inhabitants of different types of aquatic habitats, including marine and estuarine waters and rivers. Although numerous studies have surveyed yeast occurrence in these habitats, the identification of autochthonous populations has been problematic because several yeast species seem to be very versatile and therefore mere presence is not sufficient to establish an ecological association. In the present study we investigated the dynamics of the yeast community in the Tagus river estuary (Portugal) by combining a microbiological study involving isolation, quantification, and molecular identification of dominant yeast populations with the analysis of hydrological and hydrographical data. We set out to test the hypothesis of the multiple origins of estuarine yeast populations in a transect of the Tagus estuary and we postulate four possible sources: open sea, terrestrial, gastrointestinal and the estuary itself in the case of populations that have become resident. Candida parapsilosis and Pichia guilliermondii were correlated with Escherichia coli, which indicated an intestinal origin. Other cream-colored yeasts like Debaryomyces hansenii and Candida zeylanoides had similar dynamics, but no association with E. coli and quite distinct ecological preferences. They might represent a group of resident estuarine populations whose primary origin is diverse and can include marine, terrestrial, and gastrointestinal habitats. Another major yeast population was represented by Rhodotorula mucilaginosa. The cosmopolitan nature of that species and its moderate association with E. coli point to terrestrial sources as primary habitats.

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“…In 1999, Willerslev et al reported a diverse clone library of eukaryotic 18S rDNA in a North Greenland glacier and Castello et al (1999) detected plant and bacterial viruses in Dye3 and GISP2 ice core samples. Fungi and algae were also cultivated from these ice cores (Catranis & Starmer 1991;Christner et al 2000;Starmer et al 2005). Over 10% of viable bacterial spores were enumerated in GISP2 ice (Yung et al 2007).…”

mentioning

confidence: 99%