6533b820fe1ef96bd127a53b
RESEARCH PRODUCT
Viable But Not Culturable (VBNC) state of Brettanomyces bruxellensis in wine: New insights on molecular basis of VBNC behaviour using a transcriptomic approach
Giuseppe SpanoFrancesco GriecoAntonella LamontanaraPasquale RussoLuigi OrrùVania MichelottiVittorio CapozziMaria Rosaria Di ToroHervé AlexandreMohammad Salmasubject
0301 basic medicine[ SDV.AEN ] Life Sciences [q-bio]/Food and NutritionColony Count MicrobialExpressionSaccharomyces-cerevisiaeTranscriptometranscriptomicsHomeostasisSulfur DioxideHeat-Shock Proteinsmedicine.diagnostic_testViabilityCarbohydrate MetabolismOxidation-ReductionVolatile phenol production030106 microbiologyBrettanomyces bruxellensisBrettanomycesBiologyFlow cytometryMicrobiology03 medical and health sciencesPhenolsHeat shock proteinsulphitemedicineSulfiteswineGeneRna-seqBrettanomyces; spoilage; sulphite; transcriptomics; Viable But Not Culturable (VBNC); wine; food science; microbiologyWineMicrobial ViabilityGene Expression ProfilingspoilagemicrobiologyDNA replicationNonculturable bacteriabiology.organism_classificationCampylobacter-jejuniSulfur-dioxideYeastYeastCulture MediaOxidative StressFood MicrobiologyViable But Not Culturable (VBNC)food science[SDV.AEN]Life Sciences [q-bio]/Food and NutritionSettore AGR/16 - Microbiologia Agrariadescription
International audience; The spoilage potential of Brettanomyces bruxellensis in wine is strongly connected with the aptitude of this yeast to enter in a Viable But Non Culturable (VBNC) state when exposed to the harsh wine conditions. In this work, we characterized the VBNC behaviour of seven strains of B. bruxellensis representing a regional intraspecific biodiversity, reporting conclusive evidence for the assessment of VBNC as a strain-dependent character. The VBNC behaviour was monitored by fluorescein diacetate staining/flow cytometry for eleven days after addition of 0.4, 0.6, 0.8, 1 and 1.2 mg/L of molecular SO2 (entrance in the VBNC state) and after SO2 removal (exit from the VBNC state). Furthermore, one representative strain was selected and RNA-seq analysis performed after exposure to 1.2 mg/L SO2 and during the recovery phase. 30 and 1634 genes were identified as differentially expressed following VBNC entrance and 'resuscitation', respectively. The results reported strongly suggested that the entrance in the SO2-induced VBNC state in B. bruxellensis is associated with both, sulfite toxicity and oxidative stress response, confirming the crucial role of genes/proteins involved in redox cell homeostasis. Among the genes induced during recovery, the expression of genes involved in carbohydrate metabolism and encoding heat shock proteins, as well as enriched categories including amino acid transport and transporter activity was observed. The evidences of a general repression of genes involved in DNA replication suggest the occurrence of a true resuscitation of cell rather than a simple regrowth
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-10-01 |