Data di Pubblicazione:
2008
Citazione:
Psychrophilic yeasts in glacial environments of Alpine glaciers / B. Turchetti, P. Buzzini, M. Goretti, E. Branda, G. A. Diolaiuti, C. D'Agata, C. Smiraglia, A. Vaughan-Martini. - In: FEMS MICROBIOLOGY ECOLOGY. - ISSN 0168-6496. - 63:1(2008 Jan), pp. 73-83.
Abstract:
The presence of psychrophilic yeasts in supra- and subglacial sediments, ice and
meltwater collected from two glaciers of the Italian Alps (Forni and Sforzellina – Ortles-Cevedale group) was investigated. After incubation at 4°C, subglacial sediments contained from 1.3 x 10^3 to 9.6 x 10^3 CFU of yeasts g^(-1). The number of yeast cells in supraglacial sediments was c. 10–100-fold lower. A significant
proportion of isolated yeasts exhibited one or more extracellular enzymatic
activities (starch-degrading, lipolytic, esterolytic, proteolytic and pectinolytic activity) at 4°C. Selected isolates were able to grow at 2°C under laboratorysimulated in situ conditions. In all, 106 isolated yeasts were identified by MSP-PCR fingerprinting and 26S rRNA gene sequencing of the D1/D2 region as belonging to 10 species: Aureobasidium pullulans, Cryptococcus gilvescens (over 50% of the
total), Cryptococcus terricolus, Mrakia gelida, Naganishia globosa, Rhodotorula
glacialis, Rhodotorula psychrophenolica, Rhodotorula bacarum, Rhodotorula creatinivora and Rhodotorula laryngis. Four strains, all belonging to a new yeast species, yet to be described, were also isolated.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Alpine glaciers; Glacial environments; Psychrophilic yeasts
Elenco autori:
B. Turchetti, P. Buzzini, M. Goretti, E. Branda, G. A. Diolaiuti, C. D'Agata, C. Smiraglia, A. Vaughan-Martini
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