Yeasts from sub-Antarctic region : biodiversity, enzymatic activities and their potential as oleaginous microorganisms

Dublin Core

Title

Yeasts from sub-Antarctic region : biodiversity, enzymatic activities and their potential as oleaginous microorganisms

Subject

LEVADURAS
ENZIMAS
BIODIVERSIDAD
MICROORGANISMOS OLEAGINOSOS
BIBLIOGRAFIA NACIONAL
2016

Abstract

Various microbial groups are well known to produce a range of extracellular enzymes and other secondary metabolites. However, the occurrence and importance of investment in such activities have received relatively limited attention in studies of Antarctic soil microbiota. Sixty-one yeasts strains were isolated from King George Island, Antarctica which were characterized physiologically and identified at the molecular level using the D1/D2 region of rDNA. Fifty-eight yeasts (belonging to the genera Cryptococcus, Leucosporidiella, Rhodotorula, Guehomyces, Candida, Metschnikowia and Debaryomyces) were screened for extracellular amylolytic, proteolytic, esterasic, pectinolytic, inulolytic xylanolytic and cellulolytic activities at low and moderate temperatures. Esterase activity was the most common enzymatic activity expressed by the yeast isolates regardless the assay temperature and inulinase was the second most common enzymatic activity. No cellulolytic activity was detected. One yeast identified as Guehomyces pullulans (8E) showed significant activity across six of seven enzymes types tested. Twenty-eight yeast isolates were classified as oleaginous, being the isolate 8E the strain that accumulated the highest levels of saponifiable lipids (42 %).

Creator

Martínez, A.
Cavello, I.
Garmendia, G.
Rufo, Caterina
Cavallito, S.

Source

Extremophiles v. 20, 2016. -- p. 759-769

Publisher

Springer

Date

2016

Rights

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Format

PDF

Language

Inglés

Type

Artículo

Identifier

DOI: 10.1007/s00792-016-0865-3

Document Item Type Metadata

Original Format

PDF
Date Added
September 28, 2016
Collection
Bibliografía Nacional Química
Item Type
Document
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Citation
Martínez, A. et al., “Yeasts from sub-Antarctic region : biodiversity, enzymatic activities and their potential as oleaginous microorganisms,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed November 17, 2025, https://riquim.fq.edu.uy/items/show/4387.