Seasonal and plant‐dependent variations in diversity, abundance and stress tolerance of epiphytic yeasts in desert habitats

Abu‐Ghosh, Said; Droby, Samir; Korine, Carmi

doi:10.1111/1758-2229.12161

Cited by 9 publications

(3 citation statements)

References 63 publications

(64 reference statements)

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“…Filobasidium magnum was also detected in our study at a higher abundance and frequency ( Table S2 ). Filobasidium magnum , which has been reported from Arctic glaciers [ 34 , 63 ] and plants inhabiting the Negev Desert and the Dead Sea region [ 64 ], was observed in our sampling sites in the Qaidam Basin that is characterized by hyper-arid, alkaline, and hypersaline environments. Similarly, strains of F. magnum were also plant-related with frequent isolation from plants in our study, implying this species may help plants to survive in dry areas.…”

Section: Discussionmentioning

confidence: 66%

Yeast Diversity in the Qaidam Basin Desert in China with the Description of Five New Yeast Species

Wei

Zhu

Liu

et al. 2022

JoF

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The Qaidam Basin is the highest and one of the largest and driest deserts on Earth. It is considered a mars analog area in China. In contrast to numerous studies concerning its geology, geophysical, and chemistry, relatively few studies have reported microbial diversity and distribution in this area. Here, we investigated culturable yeast diversity in the northeast Qaidam Basin. A total of 194 yeast strains were isolated, and 12 genera and 21 species were identified, among which 19 were basidiomycetous yeasts. Naganishia albida, N. adeliensis, and Filobasidium magnum were the three most dominant species and were distributed in thirteen samples from eight locations. Five new species (Filobasidium chaidanensis, Kondoa globosum, Symmetrospora salmoneus, Teunia nitrariae, and Vishniacozyma pseudodimennae) were found and described based on ITS and D1D2 gene loci together with phenotypic characteristics and physiochemical analysis. Representative strains from each species were chosen for the salt-tolerant test, in which species showed different responses to different levels of NaCl concentrations. Further, the strain from soil can adapt well to the higher salt stress compared to those from plants or lichens. Our study represents the first report of the yeast diversity in the Qaidam Basin, including five new species, and also provides further information on the halotolerance of yeasts from the saline environment in mars analog.

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Section: Discussionmentioning

confidence: 66%

Yeast Diversity in the Qaidam Basin Desert in China with the Description of Five New Yeast Species

Wei

Zhu

Liu

et al. 2022

JoF

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“…Further explanation of the co-occurrence of Mrakia and Glaciozyma -related taxon will be possible once the metabolic and other characteristics of the latter have been characterised further. Filobasidium species are widely spread, from very arid environments 99 to Italian glacial meltwaters 100 and basal ice of the High Arctic 4 . Species of the genus Naganishia are among the most resistant organisms to UV radiation 101 : they are found in many extreme environments such as high elevation soil of the Atacama Desert 101,102 , of the Antarctic Dry Valleys 81 , and of subglacial ice in Svalbard 4 .…”

Section: Discussionmentioning

confidence: 99%

Fungal and bacterial diversity of Svalbard subglacial ice

Perini

Gostinčar

Gunde‐Cimerman

2019

Sci Rep

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The composition of fungal and bacterial communities in three polythermal glaciers and associated aquatic environments in Kongsfjorden, Svalbard was analysed using a combination of cultivation and amplicon sequencing. 109 fungal strains belonging to 30 mostly basidiomycetous species were isolated from glacial samples with counts up to 103 CFU/100 ml. Glaciozyma-related taxon and Phenoliferia psychrophenolica were the dominant species. Unexpectedly, amplicon sequencing uncovered sequences of Chytridiomycota in all samples and Rozellomycota in sea water, lake water, and tap water. Sequences of Malassezia restricta and of the extremely halotolerant Hortaea werneckii were also found in subglacial habitats for the first time. Overall, the fungal communities within a glacier and among glaciers were diverse and spatially heterogenous. Contrary to this, there was a large overlap between the bacterial communities of different glaciers, with Flavobacterium sp. being the most frequently isolated. In amplicon sequencing Actinobacteria and Proteobacteria sequences were the most abundant.

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“…This suggested that A. melanogenium P5 strain isolated from the mangrove ecosystem was more thermotolerant than the yeast strain XJ5-1. In contrast, the epiphytic yeast strains isolated from the plants of the Negev Desert and the Dead Sea region, Israel, showed an unusual tolerance to extreme growth conditions, such as high temperatures (up to 72 % viability at 50 °C), lethal hydrogen peroxide and NaCl concentrations (Abu-Ghosh et al 2014). …”

Section: Response To Heat Treatmentmentioning

confidence: 98%

Melanin production by a yeast strain XJ5-1 of Aureobasidium melanogenum isolated from the Taklimakan desert and its role in the yeast survival in stress environments

Jiang

Liu

et al. 2016

Extremophiles

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The yeast strain XJ5-1 isolated from the Taklimakan desert soil was identified to be a strain of Aureobasdium melanogenum and could produce a large amount of melanin when it was grown in the PDA medium, but its melanin biosynthesis and expression of the PKS gene responsible for the melanin biosynthesis was significantly repressed in the presence of (NH4)2SO4. However, A. melanogenum P5 strain isolated from a mangrove ecosystem grown in both the presence and the absence of (NH4)2SO4 did not produce any melanin. The cell size of A. melanogenum XJ5-1 strain was much higher than that of A. melanogenum P5 strain. The melanized cells of the yeast strain XJ5-1 had higher tolerance to UV radiation, oxidation (200.0 mM H2O2), heat treatment (40 °C), salt shock (200.0 g/L NaCl), desiccation and strong acid hydrolysis (6.0 M HCl) at high temperature (80 °C) than the non-melanized cells of the same yeast strain XJ5-1. At the same time, the melanized cells of the yeast strain XJ5-1 also had higher tolerance to UV radiation, oxidation (200.0 mM H2O2), desiccation and strong acid hydrolysis (6.0 M HCl) at high temperature (80 °C) than A. melanogenum P5 strain, but had similar resistance to heat treatment (40 °C) and salt shock (200.0 g/L NaCl) compared to those of A. melanogenum P5 strain. All the results revealed that many characteristics of A. melanogenum XJ5-1 isolated from the Taklimakan desert soil was different from those of A. melanogenum P5 strain isolated from the mangrove ecosystem.

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Seasonal and plant‐dependent variations in diversity, abundance and stress tolerance of epiphytic yeasts in desert habitats

Cited by 9 publications

References 63 publications

Yeast Diversity in the Qaidam Basin Desert in China with the Description of Five New Yeast Species

Yeast Diversity in the Qaidam Basin Desert in China with the Description of Five New Yeast Species

Fungal and bacterial diversity of Svalbard subglacial ice

Melanin production by a yeast strain XJ5-1 of Aureobasidium melanogenum isolated from the Taklimakan desert and its role in the yeast survival in stress environments

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