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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Antarctic-derived yeasts: taxonomic identification and resistance to adverse conditions

Full text
Author(s):
GABRIELE S. FARIAS [1] ; JULIANA A. SANTOS [2] ; PATRICIA GIOVANELLA ; LARA D. SETTE
Total Authors: 4
Affiliation:
[1] Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP). Instituto de Biociências - Brasil
[2] Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP). Instituto de Biociências - Brasil
Total Affiliations: 4
Document type: Journal article
Source: Anais da Academia Brasileira de Ciências; v. 94, 2022-03-25.
Abstract

Abstract Antarctic harsh conditions favor the development of microbial adaptations. In this study, a molecular approach was applied to identify/refine the taxonomy of five yeasts isolated from different Antarctic samples, which were tested against ranges of temperature, UV radiations, salinity, and pH. Based on sequencing and phylogenetic analysis, strain CRM 1839 was confirmed as Naganishia sp., and strains CRM 1874, CRM 1565, CRM 2571, and CRM 2576 were identified as Goffeauzyma gilvescens, Goffeauzyma gastrica, Candida atlantica, and Camptobasidium sp., respectively, being this last one possibly a new species. Growth at different temperatures indicates that these yeasts are psychrotolerant, with the exception of Camptobasidium sp., which presents psychrophilic characteristics. G. gastrica recovered from marine sediment showed the best results of resistance to UV radiation, being able to grow even after the exposure to UVB dose of 9144 J/m² and UVC dose of 6102 J/m². C. atlantica isolated from glacier soil showed high cellular growth from 3 to 10% NaCl. The majority of the strains produced higher biomass at pH 7; nevertheless, G. gilvescens showed higher biomass production at pH 9. The studied Antarctic-derived yeasts have adaptations to extreme conditions, which makes them useful for biotechnological applications and studies of extremophiles. (AU)

FAPESP's process: 17/14216-6 - Diversity and UV radiation resistance of Antarctica glacier retreat soil yeasts
Grantee:Gabriele Santana de Farias
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 15/25170-1 - Soil fungi of Collins glacier (Antarctica): evaluation of biodiversity and resistance to UV radiation
Grantee:Juliana Aparecida dos Santos
Support Opportunities: Scholarships in Brazil - Doctorate