The diversity, extracellular enzymatic activities and photoprotective compounds of yeasts isolated in Antarctica

Vaz, Aline B. M.; Rosa, Luiz Henrique; Vieira, Mariana L.A.; García, Virginia de; Brandão, Luciana R.; Teixeira, Lia Cardoso Rocha Saraiva; Moliné, Martín; Libkind, Diego; Broock, María van; Rosa, Carlos A.

doi:10.1590/s1517-83822011000300012

Cited by 146 publications

(70 citation statements)

References 38 publications

(22 reference statements)

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“…In addition, M. australis has been found in marine sediment and freshwater in Antarctica (Vaz et al, 2011). The recovery of M. australis in association with the macroalgae A. arcta and D. menziesii reinforces the notion that this yeast may exhibit a specific association with Antarctic macroalgae.…”

Section: Discussionmentioning

confidence: 59%

Diversity and bioprospecting of fungal communities associated with endemic and cold-adapted macroalgae in Antarctica

et al. 2013

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We surveyed the distribution and diversity of fungi associated with eight macroalgae from Antarctica and their capability to produce bioactive compounds. The collections yielded 148 fungal isolates, which were identified using molecular methods as belonging to 21 genera and 50 taxa. The most frequent taxa were Geomyces species (sp.), Penicillium sp. and Metschnikowia australis. Seven fungal isolates associated with the endemic Antarctic macroalgae Monostroma hariotii (Chlorophyte) displayed high internal transcribed spacer sequences similarities with the psychrophilic pathogenic fungus Geomyces destructans. Thirty-three fungal singletons (66%) were identified, representing rare components of the fungal communities. The fungal communities displayed high diversity, richness and dominance indices; however, rarefaction curves indicated that not all of the fungal diversity present was recovered. Penicillium sp. UFMGCB 6034 and Penicillium sp. UFMGCB 6120, recovered from the endemic species Palmaria decipiens (Rhodophyte) and M. hariotii, respectively, yielded extracts with high and selective antifungal and/or trypanocidal activities, in which a preliminary spectral analysis using proton nuclear magnetic resonance spectroscopy indicated the presence of highly functionalised aromatic compounds. These results suggest that the endemic and cold-adapted macroalgae of Antarctica shelter a rich, diversity and complex fungal communities consisting of a few dominant indigenous or mesophilic cold-adapted species, and a large number of rare and/or endemic taxa, which may provide an interesting model of algal-fungal interactions under extreme conditions as well as a potential source of bioactive compounds.

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Section: Discussionmentioning

confidence: 59%

Diversity and bioprospecting of fungal communities associated with endemic and cold-adapted macroalgae in Antarctica

et al. 2013

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“…1). These species occur in Arctic or Antarctic seawater, algae, and glacial environments Vaz et al 2011;Buzzini et al 2012). However, most of them have also been reported from soil (Maksimova and Chernov 2004;Lim et al 2010) or associated with animals (Bruce and Morris 1973;Kobatake et al 1992;Zacchi and Vaughan-Martini 2002), including deep-sea corals and mussels (Burgaud et al 2010;Galkiewicz et al 2012).…”

Section: Yeast Community At Helgoland Roadsmentioning

confidence: 99%

Study on the effects of near-future ocean acidification on marine yeasts: a microcosm approach

et al. 2013

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Marine yeasts play an important role in biodegradation and nutrient cycling and are often associated with marine flora and fauna. They show maximum growth at pH levels lower than present-day seawater pH. Thus, contrary to many other marine organisms, they may actually profit from ocean acidification. Hence, we conducted a microcosm study, incubating natural seawater from the North Sea at present-day pH (8.10) and two near-future pH levels (7.81 and 7.67). Yeasts were isolated from the initial seawater sample and after 2 and 4 weeks of incubation. Isolates were classified by matrix-assisted laser desorption/ ionization time-of-flight mass spectrometry (MALDI-TOF MS) and representative isolates were identified by partial sequencing of the large subunit rRNA gene. From the initial seawater sample, we predominantly isolated a yeast-like filamentous fungus related to Aureobasidium pullulans, Cryptococcus sp., Candida sake, and various cold-adapted yeasts. After incubation, we found more different yeast species at near-future pH levels than at present-day pH. Yeasts reacting to low pH were related to Leucosporidium scottii, Rhodotorula mucilaginosa, Cryptococcus sp., and Debaryomyces hansenii. Our results suggest that these yeasts will benefit from seawater pH reductions and give a first indication that the importance of yeasts will increase in a more acidic ocean.

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“…Cold active lipase produced by Cryptococcus spp. (Carrasco et al, 2012;Hatha et al, 2013;Vaz et al, 2011) were also reported from various sources but all of them reported lipase in qualitative method only. There are reports of lipase producing Rhodococcus from cold habitats (De Santi et al, 2014).…”

Section: Effects Of Production Parameters On Lipase By N149 and Y-32mentioning

confidence: 98%

“…able to produce cold active lipase using olive oil (Rapp and Backhaus, 1992;Divya and Padma, 2015). There are many reports of getting cold active lipase by bacteria and fungi isolated from various regions like Antarctica (Vaz et al, 2011;Carrasco et al, 2012;Antony et al, 2016), Arctic (Hatha et al, 2013;Singh et al, 2012bSingh et al, , 2014aSingh et al, , b, 2015 and other deep sea and temperate regions (Buzzini and Martini, 2002;Jeon et al, 2009;Joseph et al, 2012;Ray, 2014a, b, 2015b).…”

Section: Effects Of Production Parameters On Lipase By N149 and Y-32mentioning

confidence: 99%

“…Previous reports suggest of getting more psychrotolerants from cold habitats like Antarctica than true obligate psychrophiles (Antony et al, 2016;Hatha et al, 2013;Vaz et al, 2011). Over the last decades the Antarctic examined mainly for the presence of psychrophilic bacteria and archea, and more rarely for fungi (Gunde-Cimerman et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Cold Active Lipases Produced by Cryptococcus sp. Y-32 and Rhodococcus erythropolis N149 Isolated from Nella Lake, Antarctica

Maharana¹,

Singh²

2018

Int.J.Curr.Microbiol.App.Sci

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The diversity, extracellular enzymatic activities and photoprotective compounds of yeasts isolated in Antarctica

Abstract: The diversity of yeasts collected from different sites in Antarctica (Admiralty Bay, King George Island and Port Foster Bay and Deception Island) and their ability to produce extracellular enzymes and mycosporines were studied.

Cited by 146 publications

References 38 publications

Diversity and bioprospecting of fungal communities associated with endemic and cold-adapted macroalgae in Antarctica

Diversity and bioprospecting of fungal communities associated with endemic and cold-adapted macroalgae in Antarctica

Study on the effects of near-future ocean acidification on marine yeasts: a microcosm approach

Cold Active Lipases Produced by Cryptococcus sp. Y-32 and Rhodococcus erythropolis N149 Isolated from Nella Lake, Antarctica

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