Surviving in hot and cold: psychrophiles and thermophiles from Deception Island volcano, Antarctica

Autor(es)

Bendia, Amanda G. ^[1] ; Araujo, Gabriel G. ^[2] ; Pulschen, Andre A. ^[3] ; Contro, Bruna ^[4] ; Duarte, Rubens T. D. ^[1] ; Rodrigues, Fabio ^[3] ; Galante, Douglas ^[5] ; Pellizari, Vivian H. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Oceanog, Dept Oceanog Biol, Praca Oceanog 191, BR-05508900 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Interunities Grad Program Biotechnol, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Inst Chem, Sao Paulo - Brazil

^[4] Univ Estadual Paulista Julio de Mesquisa Filho, Undergrad Program Biol, Sao Paulo - Brazil

^[5] Brazilian Ctr Res Energy & Mat, Brazilian Synchrotron Light Lab, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EXTREMOPHILES; v. 22, n. 6, p. 917-929, NOV 2018.
• Citações Web of Science: 4

Resumo

Polar volcanoes harbor unique conditions of extreme temperature gradients capable of selecting different types of extremophiles. Deception Island is a marine stratovolcano located at Maritime Antarctica that is notable for its pronounced temperature gradients over very short distances, reaching values up to 100 degrees C in the fumaroles, and subzero temperatures next to the glaciers. Due to these characteristics, Deception can be considered an interesting analogue of extraterrestrial environments. Our main goal in this study was to isolate thermophilic and psychrophilic bacteria from sediments associated with fumaroles and glaciers from two geothermal sites in Deception Island, comprising temperatures between 0 and 98 degrees C, and to evaluate their survivability to desiccation and UV-C radiation. Our results revealed that culturable thermophiles and psychrophiles were recovered among the extreme temperature gradient in Deception volcano, which indicates that these extremophiles remain alive even when the conditions do not comprise their growth range. The viability of culturable psychrophiles in hyperthermophilic environments is still poorly understood and our work showed the importance of future studies about their survival strategies in high temperatures. Finally, the spore-forming thermophilic isolates which we found have displayed good survival to desiccation and UV-C irradiation, which suggests their potential to be further explored in astrobiological studies. (AU)

• Processo FAPESP: 12/11037-0 - Indicadores microbianos de mudanças climáticas em amostras de ambientes extremos da Antártica marítima
• Beneficiário: Rubens Tadeu Delgado Duarte
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 12/23241-0 - Metagenoma de comunidades microbianas de ambientes com atividade geotermal na Ilha Vulcânica Deception, Antártica
• Beneficiário: Amanda Gonçalves Bendia
• Modalidade de apoio: Bolsas no Brasil - Doutorado