Abstract
Thiols are a group of highly potent aroma compounds found in many Vitis vinifera wines. In berries, thiols occur as precursors formed from a thiol attached to an amino moiety (e.g., cysteine and glutathione). Foliar sulfur and urea supplementation has been found to increase thiol precursors in V. vinifera berries. However, such data are still scarce for interspecific hybrid Vitis varieties, despite a growing interest in these cultivars. In this study, eight thiol precursors, 21 amino acids and glutathione (GSH) of seven white hybrid Vitis varieties collected in Quebec, Canada, were quantified by liquid chromatography with tandem mass spectrometry. Then, the impact of foliar sulfur and urea supplementation on thiol precursors of fully mature berries was tested on the Vitis sp. Vidal, using a complete randomised block design. Among the analysed thiol precursors, only the precursors of 3-mercaptohexan-1-ol (3MH) were detected, with glutathione-3MH (20-711 μg/kg berry fresh weight) as the main precursor in most studied varieties. Vidal samples had the highest concentrations of glutathione-3MH (313 μg/kg berry fresh weight) and GSH (17 mg/L in juice), but a large variability was found among the biological replicates. The amino acids proline, arginine, glutamine and alanine were the main amino acids found in Vidal, Frontenac blanc, Seyval blanc and Saint-Pepin respectively. Correlation analysis showed no significant relationship between thiol precursor and glutathione/amino acid content in berries. Foliar urea and sulfur supplementation had no impact on thiol precursor concentration in Vidal. However, a trend in a higher content of thiol precursors in berries treated with urea and sulfur compared to the control was observed on one of the two experimental sites.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Only precursors of 3-mercaptohexan-1-ol were detected among analyzed thiol precursors.
- Outcome
- precursors of 3-mercaptohexan-1-ol (3MH) were detectede0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only the precursors of 3-mercaptohexan-1-ol (3MH) were detected”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
Glutathione-3MH was the main precursor in most varieties, at 20-711 μg/kg berry fresh weight.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glutathione-3MH (20-711 μg/kg berry fresh weight) as the main precursor in most studied varieties”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
Vidal had the highest glutathione-3MH concentration, 313 μg/kg berry fresh weight.
- Material
- Vidale0
- Outcome
- concentrations of glutathione-3MHe0
- Direction
- higheste0
- Value
- 313 μg/kg berry fresh weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vidal samples had the highest concentrations of glutathione-3MH (313 μg/kg berry fresh weight)”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
Vidal had the highest GSH concentration, 17 mg/L in juice.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vidal samples had the highest concentrations of glutathione-3MH (313 μg/kg berry fresh weight) and GSH (17 mg/L in juice)”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
The principal amino acid was proline in Vidal.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline, arginine, glutamine and alanine were the main amino acids found in Vidal, Frontenac blanc, Seyval blanc and Saint-Pepin respectively”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
The principal amino acid was arginine in Frontenac blanc.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline, arginine, glutamine and alanine were the main amino acids found in Vidal, Frontenac blanc, Seyval blanc and Saint-Pepin respectively”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
The principal amino acid was glutamine in Seyval blanc.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline, arginine, glutamine and alanine were the main amino acids found in Vidal, Frontenac blanc, Seyval blanc and Saint-Pepin respectively”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
The principal amino acid was alanine in Saint-Pepin.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline, arginine, glutamine and alanine were the main amino acids found in Vidal, Frontenac blanc, Seyval blanc and Saint-Pepin respectively”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
Thiol precursor content was not significantly related to glutathione or amino acid content in berries.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant relationship between thiol precursor and glutathione/amino acid content in berries”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
Foliar urea and sulfur supplementation had no impact on thiol precursor concentration in Vidal.
- Material
- Vidale0
- Treatment
- Foliar urea and sulfur supplementatione0
- Outcome
- thiol precursor concentratione0
- Direction
- no impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar urea and sulfur supplementation had no impact on thiol precursor concentration in Vidal”
t0“Vitis sp. Vidal berries”
Claim · model-written summary
At one of two sites, berries treated with urea and sulfur tended toward higher thiol precursor content than controls.
- Treatment
- urea and sulfure0
- Outcome
- content of thiol precursorse0
- Direction
- highere0
- Qualifier
- one of the two experimental sitese0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a trend in a higher content of thiol precursors in berries treated with urea and sulfur compared to the control was observed on one of the two experimental sites”
t0“Vitis sp. Vidal berries”
The same questions in other papers
sulfur atom · molecular: metabolites · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
nitrogen · molecular: metabolites · VitisPositive and negative results
15 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- negative
16 papers more in this group
See all 20 papers →application · molecular: metabolites · VitisPositive and negative results
4 papers in the same direction as this paper · 46 in the opposite direction
- positive
- positive
- positive
47 papers more in this group
See all 51 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.