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Relief from nitrogen starvation entails quick unexpected down-regulation of glycolytic/lipid metabolism genes in enological Saccharomyces cerevisiae

View ORCID ProfileCatherine Tesnière, Chloé Bessière, Martine Pradal, Isabelle Sanchez, Bruno Blondin, View ORCID ProfileFrédéric Bigey
doi: https://doi.org/10.1101/428979
Catherine Tesnière
INRA;
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Chloé Bessière
INRA;
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Martine Pradal
INRA;
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Isabelle Sanchez
INRA;
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Bruno Blondin
Montpellier SupAgro
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Frédéric Bigey
INRA;
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  • For correspondence: frederic.bigey@inra.fr
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Abstract

Nitrogen composition of the grape must has an impact on yeast growth and fermentation kinetics as well as on the organoleptic properties of the final product. In some technological processes, such as white wine/rosé winemaking, the yeast-assimilable nitrogen content is sometimes insufficient to cover yeast requirements, which can lead to slow or sluggish fermentations. Growth is nevertheless quickly restored upon relief from nutrient starvation, e.g. through the addition of ammonium nitrogen, allowing fermentation completion. The aim of this study was to determine how nitrogen repletion affected the genomic cell response of a Saccharomyces cerevisiae wine yeast strain, in particular within the first hour after nitrogen addition. We found almost 4800 genes induced or repressed, sometimes within minutes after nutrient changes. Some of the transcriptional responses to nitrogen depended on the TOR pathway, which controls positively ribosomal protein genes, amino acid and purine biosynthesis or amino acid permease genes and negatively stress-response genes, RTG specific TCA cycle genes and NCR sensitive genes. Some unexpected transcriptional responses concerned all the glycolytic genes, the starch and glucose metabolism and citrate-cycle related genes that were down-regulated, as well as genes from the lipid metabolism.

Footnotes

  • The following sections were mistakenly deleted in the first version. Missing sections in Mat & Met: -Labelling and microarray processing -Statistical analysis Missing section in Results & Discussion: -Changes in fermentation kinetics

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted October 01, 2018.
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Relief from nitrogen starvation entails quick unexpected down-regulation of glycolytic/lipid metabolism genes in enological Saccharomyces cerevisiae
Catherine Tesnière, Chloé Bessière, Martine Pradal, Isabelle Sanchez, Bruno Blondin, Frédéric Bigey
bioRxiv 428979; doi: https://doi.org/10.1101/428979
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Relief from nitrogen starvation entails quick unexpected down-regulation of glycolytic/lipid metabolism genes in enological Saccharomyces cerevisiae
Catherine Tesnière, Chloé Bessière, Martine Pradal, Isabelle Sanchez, Bruno Blondin, Frédéric Bigey
bioRxiv 428979; doi: https://doi.org/10.1101/428979

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