Advertisement

Topics

Effects of melatonin and tryptophol addition on fermentations carried out by Saccharomyces cerevisiae and non-Saccharomyces yeast species under different nitrogen conditions.

08:00 EDT 17th September 2018 | BioPortfolio

Summary of "Effects of melatonin and tryptophol addition on fermentations carried out by Saccharomyces cerevisiae and non-Saccharomyces yeast species under different nitrogen conditions."

During wine fermentation, yeasts produce metabolites that are known growth regulators. The relationship between certain higher alcohols derived from aromatic amino acid metabolism and yeast signalling has previously been reported. In the present work, tryptophol (TrpOH) or melatonin (MEL), which are putative growth regulators, were added to alcoholic fermentations. Fermentations were performed with three different inocula, combining Saccharomyces cerevisiae and four non-Saccharomyces yeast species, under two nitrogen conditions. The combinations tested were: (i) only S. cerevisiae; (ii) the mixture of four non-Saccharomyces species; and (iii) the combination of all five species together. The results revealed that the TrpOH and MEL addition caused changes in fermentation kinetics, viability and species distribution during fermentation, but it was dependent on the nitrogen present in the media and the composition of the inocula. Low nitrogen condition seemed to favour the presence of non-Saccharomyces species until mid-fermentation, although at the end of fermentation the imposition of Saccharomyces was higher in this condition. The presence of high concentrations of TrpOH resulted in limited growth and a delay in fermentation, noticeably significant in fermentations performed with S. cerevisiae inocula. These effects were reversed by the presence of non-Saccharomyces yeast in the medium. Low TrpOH concentration allowed faster fermentation with mixed non-Saccharomyces and Saccharomyces inocula. Moreover, in the absence of S. cerevisiae, a low concentration of TrpOH increased the presence of Torulaspora delbrueckii during fermentation with high nitrogen availability but not under low nitrogen conditions, when the population of S. bacillaris was higher than that in the control. The effects of MEL were particularly evident at the beginning and end of the process, primarily favouring the growth of non-Saccharomyces strains, especially the first hours after inoculation.

Affiliation

Journal Details

This article was published in the following journal.

Name: International journal of food microbiology
ISSN: 1879-3460
Pages: 174-181

Links

DeepDyve research library

PubMed Articles [19457 Associated PubMed Articles listed on BioPortfolio]

Fermentation of Saccharomyces cerevisiae - combining kinetic modeling and optimization techniques points out avenues to effective process design.

A combined experimental/theoretical approach is presented, for improving the predictability of Saccharomyces cerevisiae fermentations. In particular, a mathematical model was developed explicitly taki...

Quantitative assessment of DNA damage in the industrial ethanol production strain Saccharomyces cerevisiae PE-2.

Lignocellulosic hydrolysates remain one of the most abundantly used substrates for the sustainable production of second generation fuels and chemicals with Saccharomyces cerevisiae. Nevertheless, ferm...

Cell-to-cell contact mechanism modulates Starmerella bacillaris death in mixed culture fermentations with Saccharomyces cerevisiae.

The use of mixed culture fermentations with selected Starmerella bacillaris and Saccharomyces cerevisiae strains is gaining winemaking attention, mainly due to their ability to enhance particular char...

Cigarette smoke condensate alters Saccharomyces cerevisiae efflux transporter mRNA and activity and increases caffeine toxicity.

In animals, cigarette smoke may alter pharmacokinetics by altering activity and expression of ABC drug transporters. We previously demonstrated that cigarette smoke condensate (CSC) impairs activity a...

Torulaspora delbrueckii produces high levels of C5 and C6 polyols during wine fermentations.

Non-Saccharomyces yeasts impact wine fermentations and can diversify the flavour profiles of wines. However, little information is available on the metabolic networks of most of these species. Here we...

Clinical Trials [3894 Associated Clinical Trials listed on BioPortfolio]

Effect of Oral Probiotic Yeast on the Composition of the Vaginal Microbiota in Healthy Women

This study is designed to evaluate the impact of oral consumption of the probiotic yeast CNCM I-3856 on healthy vaginal microbiota

Plasma Melatonin AND Mortality After Acute Myocardial Infarction

Pre-clinical and clinical studies have demonstrated that melatonin has cardio-protection effects. Melatonin has anti-inflammatory, antioxidant, antihypertensive, antithrombotic and antilip...

Melatonin Effects on Luteinizing Hormone

In many mammals, the duration of the nocturnal melatonin elevation regulates seasonal changes in reproductive hormones such as luteinizing hormone (LH). Melatonin's effects on human repro...

Blind Child Melatonin Treatment Study

The primary focus of this five-year study will be to optimize the melatonin dosing regimen for synchronizing the body clocks of blind children to the 24-hour day.

Melatonin in Patients With Multiple Sclerosis (MS).

To date, there are no published data on the role of melatonin supplementation or the appropriate dose for patients with multiple sclerosis. Because of the potential benefits of melatonin, ...

Medical and Biotech [MESH] Definitions

A member of the Rho family of MONOMERIC GTP-BINDING PROTEINS from SACCHAROMYCES CEREVISIAE. It is involved in morphological events related to the cell cycle. This enzyme was formerly listed as EC 3.6.1.47.

Proteins obtained from the species SACCHAROMYCES CEREVISIAE. The function of specific proteins from this organism are the subject of intense scientific interest and have been used to derive basic understanding of the functioning similar proteins in higher eukaryotes.

A species of the genus SACCHAROMYCES, family Saccharomycetaceae, order Saccharomycetales, known as "baker's" or "brewer's" yeast. The dried form is used as a dietary supplement.

A set of nuclear proteins in SACCHAROMYCES CEREVISIAE that are required for the transcriptional repression of the silent mating type loci. They mediate the formation of silenced CHROMATIN and repress both transcription and recombination at other loci as well. They are comprised of 4 non-homologous, interacting proteins, Sir1p, Sir2p, Sir3p, and Sir4p. Sir2p, an NAD-dependent HISTONE DEACETYLASE, is the founding member of the family of SIRTUINS.

A family of G-protein-coupled receptors that are specific for and mediate the effects of MELATONIN. Activation of melatonin receptors has been associated with decreased intracellular CYCLIC AMP and increased hydrolysis of PHOSPHOINOSITIDES.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article