Yeasts in Polar and Subpolar Habitats

Buzzini, Pietro; Turk, Monika; Perini, Laura; Turchetti, Benedetta; Gunde‐Cimerman, Nina

doi:10.1007/978-3-319-62683-3_11

Cited by 47 publications

(39 citation statements)

References 170 publications

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“…It should be noted that various studies of psychrotolerant yeasts found in polar and subpolar environments, and even globally, showed that they can relatively easily adapt to growth across a wide range of temperatures, from slightly higher than 20°C to 37°C (Buzzini, Turk, Perini, Turchetti, & Gunde‐Cimerman, ). Over the past decades, it has become clear that these yeasts developed different evolutionary strategies to survive in various environmental conditions.…”

Section: Resultsmentioning

confidence: 99%

Anhydrobiosis in yeasts: Psychrotolerant yeasts are highly resistant to dehydration

Khroustalyova

Giovannitti

Severini

et al. 2019

Yeast

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Yeast cells are able to transition into a state of anhydrobiosis (temporary reversible suspension of metabolism) under conditions of desiccation. One of the most efficient approaches for understanding the mechanisms underlying resistance to dehydrationrehydration is to identify yeasts, which are stable under such treatments, and compare them with moderately resistant species and strains. In the current study, we investigated the resistance to dehydration-rehydration of six psychrotolerant yeast strains belonging to two species. All studied strains of Solicoccozyma terricola and Naganishia albida were found to be highly resistant to dehydration-rehydration. The viability of S. terricola strains was close to 100%. Such results have not been previously reported in studies of anhydrobiosis in yeasts. The plasma membrane changes, revealed by determining its permeability under various rehydration conditions, were also surprisingly minimal. Thus, the high level of resistance of psychrotolerant yeast strains might be related to the chemical composition and molecular organisation of their plasma membranes. Aside from plasma membrane characteristics, other important factors may also influence the maintenance of yeast cell viability under conditions of dehydration-rehydration.

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Section: Resultsmentioning

confidence: 99%

Anhydrobiosis in yeasts: Psychrotolerant yeasts are highly resistant to dehydration

Khroustalyova

Giovannitti

Severini

et al. 2019

Yeast

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“…The former genera Cryptococcus and Rhodotorula were the most commonly reported yeasts in early investigations carried out in cold habitats (reviewed by Buzzini et al, ). However, the taxonomic reorganization of both genera (Liu et al, ; Wang et al, ) has subsequently changed the use of yeasts names in more recent studies, so that members of genera Goffeauzyma , Naganishia , Papiliotrema , Solicoccozyma , Vishniacozyma and Phenoliferia , together with Cystobasidium , Rhodotorula , Dioszegia and Filobasidium appear among the most frequently found cold‐adapted species (Buzzini, Turk, et al, ; Sannino et al, ).…”

Section: Frequent Yeasts From Extreme Environments: Tough Survivorsmentioning

confidence: 99%

“…Yeasts with high temperature optima are significantly more common among the ascomycetes, although a strain-specific aptitude to thermotolerance has been often found: Buzzini et al, 2012). However, the taxonomic reorganization of both genera (Liu et al, 2016;Wang et al, 2015) has subsequently changed the use of yeasts names in more recent studies, so that members of genera Goffeauzyma, Naganishia, Papiliotrema, Solicoccozyma, Vishniacozyma and Phenoliferia, together with Cystobasidium, Rhodotorula, Dioszegia and Filobasidium appear among the most frequently found cold-adapted species (Buzzini, Turk, et al, 2017;Sannino et al, 2017). (Nguyen et al, 2001;Pitt & Hocking, 2009;Péter et al, 2017;Raspor & Zupan, 2006;Takashima et al, 2009;Russo et al, 2008;Gadanho et al, 2006).…”

Section: Frequent Yeasts From Extreme Environments: Tough Survivorsmentioning

confidence: 99%

Extremophilic yeasts: the toughest yeasts around?

Buzzini

Turchetti

Yurkov

2018

Yeast

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Microorganisms are widely distributed in a multitude of environments including ecosystems that show challenging features to most life forms. The combination of extreme physical and chemical factors contributes to the definition of extreme habitats although the definition of extreme environments changes depending on one's point of view: anthropocentric, microbial-centric or zymo-centric. Microorganisms that live under conditions that cause hard survival are called extremophiles. In particular organisms that require extreme conditions are called true extremophiles while organisms that tolerate them to some extent are termed extremotolerant. Deviation of temperature, pH, osmotic stress, pressure and radiation from the common range delineates extreme environments. Yeasts are versatile eukaryotic organisms that are not frequently considered the toughest microorganisms in comparison with prokaryotes. Nevertheless extremophilic or extremotolerant species are present also within this group. Here a brief description is provided of the main extreme habitats and the metabolic and physiological modifications adopted by yeasts depending on their adverse conditions. Additionally the main extremophilic and extremotolerant yeast species associated with a few extreme habitats are listed.

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“…Yeasts showed a wide distribution in terrestrial ecosystems: they were found from the upper levels of the atmosphere, to the phyllosphere, in hot and dry deserts, the deepest parts of the oceans, and in ancient glacial ice [3][4][5]. Cold habitats, representing over 80% of the Earth's total environments, were explored for yeasts occurrence since the 1960s [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…In the course of the past decades, a number of yeasts species were isolated from worldwide cold habitats and many new species were described [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

DNA Methylation Changes Induced by Cold in Psychrophilic and Psychrotolerant Naganishia Yeast Species

et al. 2020

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The involvement of DNA methylation in the response to cold stress of two different yeast species (Naganishia antarctica, psychrophilic, and Naganishia albida, psychrotolerant), exhibiting different temperature aptitudes, has been studied. Consecutive incubations at respective optimum temperatures, at 4 °C (cold stress) and at optimum temperatures again, were performed. After Methylation Sensitive Amplified Polymorphism (MSAP) fingerprints a total of 550 and 423 clear and reproducible fragments were amplified from N. antarctica and N. albida strains, respectively. The two Naganishia strains showed a different response in terms of level of DNA methylation during cold stress and recovery from cold stress. The percentage of total methylated fragments in psychrophilic N. antarctica did not show any significant change. On the contrary, the methylation of psychrotolerant N. albida exhibited a nonsignificant increase during the incubation at 4 °C and continued during the recovery step, showing a significant difference if compared with control condition, resembling an uncontrolled response to cold stress. A total of 12 polymorphic fragments were selected, cloned, and sequenced. Four fragments were associated to genes encoding for elongation factor G and for chitin synthase export chaperon. To the best of our knowledge, this is the first study on DNA methylation in the response to cold stress carried out by comparing a psychrophilic and a psychrotolerant yeast species.

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Yeasts in Polar and Subpolar Habitats

Cited by 47 publications

References 170 publications

Anhydrobiosis in yeasts: Psychrotolerant yeasts are highly resistant to dehydration

Anhydrobiosis in yeasts: Psychrotolerant yeasts are highly resistant to dehydration

Extremophilic yeasts: the toughest yeasts around?

DNA Methylation Changes Induced by Cold in Psychrophilic and Psychrotolerant Naganishia Yeast Species

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