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ABSTRACT: Study of fungal flora dynamics during natural and inoculated wine fermentation

PROVIDER: PRJNA939028 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23639779_1.fastq.gz	Fastqsanger.gz
	SRR23639779_2.fastq.gz	Fastqsanger.gz
	SRR23639780_1.fastq.gz	Fastqsanger.gz
	SRR23639780_2.fastq.gz	Fastqsanger.gz
	SRR23639781_1.fastq.gz	Fastqsanger.gz

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Project description:Gene expression analysis of time course experiment of [1] a synthetic must (nitrogen-rich) fermentation by a natural wine yeast; [2] a synthetic must (nitrogen-poor) fermentation by a natural wine yeast; and [3] a synthetic must (nitrogen-poor) fermentation by a natural wine yeast, supplemented at 72 hours with 200 mg/l of nitrogen. This SuperSeries is composed of the following subset Series: GSE5835: Normal Fermentation GSE5836: Sluggish Fermentation GSE5837: Recovered Fermentation Keywords: SuperSeries Refer to individual Series, and to genomic hybridization of the individual membranes used for normalizing single samples.

2010-07-01 | E-GEOD-5842 | biostudies-arrayexpress

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Project description:Transcriptomic analyses of fermenting yeast are increasingly being carried out under small scale simulated winemaking conditions. It is not known to what degree data generated from such experiments are a reflection of transcriptional processes in large-scale commercial fermentation tanks. In this experiment we set out to determine the effect of scale, or fermentation volume, on the transcriptional respone of wine yeast strains. Parallel fermentations were carried out in laboratory fermentation vials and commercial fermentation tanks using the same wine media and inoculated yeast strain. Comparative transcriptomic analyses were carried out at three time points during alcoholic fermentation. Fermentations were carried out in Chardonnay wine must in triplicate for both the lab-scale (80ml) and commercial scale (300L) fermentations. Sampling of yeast for RNA extractions were performed at day 2 of fermentation (during the exponential growth phase of the yeast cells), and again at day 5 (early stationary growth phase) and day 10 (late stationary growth phase) of fermentation.

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Expression data from yeast strain VIN13 in pure-culture fermentations and in mixed fermentations with co-inoculated Oenococcus oeni strain S6

Project description:The yeast Saccharomyces cerevisiae is an important component of the wine fermentation process and determines various attributes of the final product. However, lactic acid bacteria (LAB) are also an integral part of the microflora of any fermenting must. Various wine microorganism engineering projects have been endeavoured in the past in order to change certain wine characteristics, namely aroma compound composition, ethanol concentration, levels of toxic/ allergenic compounds etc. Most of these projects focus on a specific gene or pathway, whereas our approach aims to understand the genetically complex traits responsible for these phenotypes in a systematic manner by implementing a transcriptomic analysis of yeast in mixed fermentations with the LAB O. oeni. Our aim is to investigate interactions between yeast and LAB on a gene expression level to identify targets for modification of yeast and O. oeni in a directed manner. Our goal was to identify the impact that the common wine microorganism O. oeni (malolactic bacteria) has on fermenting yeast cells on a gene expression level. To this end we co-inoculated the yeast and bacteria at the start of fermentation in a synthetic wine must, using yeast-only fermentations witout O. oeni as a control. Fermentations were carried out in synthetic wine must in triplicate for both the control S. cerevisiae VIN13 strain and the mixed fermentation of VIN13 and O. oeni (strain S5). Sampling of yeast for RNA extractions were performed at day 3 of fermentation, during the exponential growth phase of the yeast cells, and again at day 7 of fermentation, during the early stationary growth phase.

2011-06-02 | E-GEOD-27085 | biostudies-arrayexpress

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