Abstract
Vine nitrogen status influence on S-cysteine conjugate precursors of volatile thiols, glutathione and phenolic content of the berries of Vitis vinifera L. cv. Sauvignon blanc have been assessed. Despite an increase in berry weight, the increase in nitrogen supply in the vine leads to higher cysteine precursor levels in grape juice. We also show that a late addition of nitrogen at berry set leads to a lower level of phenolic compounds in white grapes and to higher glutathione levels. Therefore, in white varieties, and particularly Sauvignon blanc, improving the nitrogen supply of the vine clearly increases its aromatic potential. However, an excess of nitrogen supply would increase the grape sensitivity to Botrytis cinerea and therefore decrease its quality.
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Claims 7
Claim · model-written summary
Increased vine nitrogen supply raised cysteine precursor levels in grape juice
- Taxon
- Vitis vinifera L.
Vitis viniferae0 - Material
- Sauvignon blance0
- Treatment
- increase in nitrogen supply in the vinee1
- Outcome
- cysteine precursor levelse1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the berries of Vitis vinifera L. cv. Sauvignon blanc have been assessed”
e1“Despite an increase in berry weight, the increase in nitrogen supply in the vine leads to higher cysteine precursor levels in grape juice”
Claim · model-written summary
Increased vine nitrogen supply increased berry weight
- Taxon
- Vitis vinifera L.Vitis viniferae0
- Treatment
- increase in nitrogen supply in the vinee1
- Outcome
- berry weighte1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the berries of Vitis vinifera L. cv. Sauvignon blanc have been assessed”
e1“Despite an increase in berry weight, the increase in nitrogen supply in the vine leads to higher cysteine precursor levels in grape juice”
Claim · model-written summary
Late nitrogen addition at berry set lowered phenolic compounds in white grapes
- Taxon
- white grapese2
- Treatment
- a late addition of nitrogen at berry sete2
- Outcome
- phenolic compoundse2
- Direction
- lowere2
Not reportedComparator
Verbatim
e0“the berries of Vitis vinifera L. cv. Sauvignon blanc have been assessed”
e2“a late addition of nitrogen at berry set leads to a lower level of phenolic compounds in white grapes and to higher glutathione levels”
Claim · model-written summary
Late nitrogen addition at berry set raised glutathione levels in white grapes
- Taxon
- white grapese2
- Treatment
- a late addition of nitrogen at berry sete2
- Outcome
- glutathione levelse2
- Direction
- highere2
Not reportedComparator
Verbatim
e0“the berries of Vitis vinifera L. cv. Sauvignon blanc have been assessed”
e2“a late addition of nitrogen at berry set leads to a lower level of phenolic compounds in white grapes and to higher glutathione levels”
Claim · model-written summary
Improving vine nitrogen supply clearly increases the aromatic potential of white varieties
- Taxon
- Vitis vinifera L.Vitis viniferae0
- Treatment
- improving the nitrogen supply of the vinee3
- Outcome
- aromatic potentiale3
- Direction
- increasese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the berries of Vitis vinifera L. cv. Sauvignon blanc have been assessed”
e3“improving the nitrogen supply of the vine clearly increases its aromatic potential”
Claim · model-written summary
An excess of vine nitrogen supply would increase grape sensitivity to Botrytis cinerea
- Taxon
- Vitis vinifera L.Vitis viniferae0
- Treatment
- an excess of nitrogen supplye4
- Interactor
- Botrytis cinerea
Botrytis cinereae4pathogen - Outcome
- grape sensitivity to Botrytis cinereae4
- Direction
- increasee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the berries of Vitis vinifera L. cv. Sauvignon blanc have been assessed”
e4“an excess of nitrogen supply would increase the grape sensitivity to Botrytis cinerea and therefore decrease its quality”
Claim · model-written summary
An excess of vine nitrogen supply would decrease grape quality
- Taxon
- Vitis vinifera L.Vitis viniferae0
- Treatment
- an excess of nitrogen supplye4
- Outcome
- qualitye4
- Direction
- decreasee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the berries of Vitis vinifera L. cv. Sauvignon blanc have been assessed”
e4“an excess of nitrogen supply would increase the grape sensitivity to Botrytis cinerea and therefore decrease its quality”
The same questions in other papers
nitrogen · quality: general · Vitis vinifera (wine grape)Positive and negative results
2 in the opposite direction
- positive
- positive
nitrogen · molecular: metabolites · Vitis vinifera (wine grape)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- no effect
3 papers more in this group
See all 7 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.