Effects of hydrostatic pressure on yeasts isolated from deep-sea hydrothermal vents

Gaétan Burgaud 1 Nguyen Thi Minh Hué 2 Danielle Arzur 1 Monika Coton 1 Jean-Marie Perrier-Cornet 2 Mohamed Jebbar 3 Georges Barbier 1
1 LUBEM - Laboratoire Universitaire de Biodiversité et Ecologie Microbienne
2 DImaCell - Dispositif Inter-régional d'Imagerie Cellulaire [Dijon]
PAM - Procédés Alimentaires et Microbiologiques, IBCT (ex IFR133) - Ingénierie et biologie cellulaire et tissulaire
3 LM2E - Laboratoire de microbiologie des environnements extrêmophiles
Abstract : Hydrostatic pressure plays a significant role in the distribution of life in the biosphere. Knowledge of deep-sea piezotolerant and (hyper)piezophilic bacteria and archaea diversity has been well documented, along with their specific adaptations to cope with high hydrostatic pressure (HHP). Recent investigations of deep-sea microbial community compositions have shown unexpected micro-eukaryotic communities, mainly dominated by fungi. Molecular methods such as next-generation sequencing have been used for SSU rRNA gene sequencing to reveal fungal taxa. Currently, a difficult but fascinating challenge for marine mycologists is to create deep-sea marine fungus culture collections and assess their ability to cope with pressure. Indeed, although there is no universal genetic marker for piezoresistance, physiological analyses provide concrete relevant data for estimating their adaptations and understanding the role of fungal communities in the abyss. The present study investigated morphological and physiological responses of fungi to HHP using a collection of deep-sea yeasts as a model. The aim was to determine whether deep-sea yeasts were able to tolerate different HHP and if they were metabolically active. Here we report an unexpected taxonomic-based dichotomic response to pressure with piezosensitve ascomycetes and piezotolerant basidiomycetes, and distinct morphological switches triggered by pressure for certain strains.
Keywords : Marine Piezotolerance Yeasts Dimorphism Filamentation Hydrostatic pressure
Document type :
Journal articles
Complete list of metadatas
https://hal-agrosup-dijon.archives-ouvertes.fr/hal-02321309
Contributor : Administrateur Agrosupdijon <>
Submitted on : Monday, October 21, 2019 - 10:00:21 AM
Last modification on : Tuesday, October 22, 2019 - 1:39:42 AM

Identifiers

Collections

AGROSUP-DIJON | AGROSUP-PAM | UNIV-BOURGOGNE | UNIV-BREST | UNIV-FCOMTE | LM2E_UBO | LUBEM | CNRS | PAM | IBSAM

Citation

Gaétan Burgaud, Nguyen Thi Minh Hué, Danielle Arzur, Monika Coton, Jean-Marie Perrier-Cornet, et al.. Effects of hydrostatic pressure on yeasts isolated from deep-sea hydrothermal vents. Research in Microbiology, Elsevier, 2015, 166 (9), pp.700-709. ⟨10.1016/j.resmic.2015.07.005⟩. ⟨hal-02321309⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

17

Contact

CCSD