Abstract
Ten different gaseous treatments were evaluated for their efficacy in the keeping quality of cv. Napoleon table grapes during 38 days of storage at 0 degrees C followed by 6 days of shelf life at 15 degrees C in air. These storage methods included modified atmosphere packaging (MAP) with and without SO(2) or natural fungicides (hexanal and hexenal), two controlled atmospheres (CA), and intermittent and continuous applications of O(3). As a control, air atmosphere during cold storage was used. Most of the treatments applied kept the postharvest quality of the grapes, although the best results were obtained by the use of a MAP with 5 kPa of O(2) plus 15 kPa of CO(2) plus 80 kPa of N(2). The total anthocyanin content at harvest was 170 +/- 19 microg/g of fresh weight (fw) of grapes, which declined in most of the treatments applied and was reflected in the loss of red color. Peonidin 3-glucoside was detected at all sampling times as the major anthocyanin (always >50% from the total content). Treatments applied kept or decreased the total flavonol content from that measured at harvest (17 +/- 1.4 microg/g of fw of berries). However, an increase of up to 2-fold in total stilbenoid content after shelf life for CA and O(3) treatments was observed. At all sampling times for almost every treatment piceid concentration remained unaltered or slightly changed, whereas large increases were observed after shelf life for resveratrol (1.2 +/- 0.6 microg/g of fw of grapes sampled at harvest), even up to 3- and 4-fold for O(3)-treated grapes and 2-fold for CA-treated ones. Therefore, improved techniques for the keeping quality of cv. Napoleon table grapes during long-term storage seem to maintain or enhance their antioxidant compound content.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 13
Claim · model-written summary
Most gas treatments kept postharvest grape quality.
Verbatim
e0“Most of the treatments applied kept the postharvest quality of the grapes”
Claim · model-written summary
MAP with 5 kPa O2, 15 kPa CO2 and 80 kPa N2 gave the best quality results.
Verbatim
e0“the best results were obtained by the use of a MAP with 5 kPa of O(2) plus 15 kPa of CO(2) plus 80 kPa of N(2).”
t0“Table Grapes”
Claim · model-written summary
Harvest total anthocyanin content was 170 +/- 19 microg/g fresh weight.
Verbatim
e0“The total anthocyanin content at harvest was 170 +/- 19 microg/g of fresh weight (fw) of grapes”
Claim · model-written summary
Total anthocyanin declined under most treatments, with loss of red color.
Verbatim
e0“which declined in most of the treatments applied and was reflected in the loss of red color.”
t0“Table Grapes”
e1“The total anthocyanin content at harvest was 170 +/- 19 microg/g of fresh weight (fw) of grapes”
Claim · model-written summary
Peonidin 3-glucoside was the major anthocyanin at all times, over half the total.
Verbatim
e0“Peonidin 3-glucoside was detected at all sampling times as the major anthocyanin (always >50% from the total content).”
t0“Table Grapes”
Claim · model-written summary
Flavonol content stayed at or fell below the harvest level of 17 +/- 1.4 microg/g.
Verbatim
e0“Treatments applied kept or decreased the total flavonol content from that measured at harvest (17 +/- 1.4 microg/g of fw of berries).”
t0“Table Grapes”
Claim · model-written summary
CA treatment increased total stilbenoids up to twofold after shelf life.
- Taxon
- grapest0
- Treatment
- CAe0
- Outcome
- total stilbenoid contente0
- Direction
- increasee0
- Value
- 2-folde0
- Qualifier
- after shelf lifee0
Not reportedComparator
Verbatim
e0“an increase of up to 2-fold in total stilbenoid content after shelf life for CA and O(3) treatments was observed.”
t0“Table Grapes”
Claim · model-written summary
O3 treatment increased total stilbenoids up to twofold after shelf life.
- Taxon
- grapest0
- Treatment
- O(3)e0
- Outcome
- total stilbenoid contente0
- Direction
- increasee0
- Value
- 2-folde0
- Qualifier
- after shelf lifee0
Not reportedComparator
Verbatim
e0“an increase of up to 2-fold in total stilbenoid content after shelf life for CA and O(3) treatments was observed.”
t0“Table Grapes”
Claim · model-written summary
Piceid concentration was unaltered or slightly changed at nearly all times and treatments.
Verbatim
e0“At all sampling times for almost every treatment piceid concentration remained unaltered or slightly changed”
t0“Table Grapes”
Claim · model-written summary
Harvest resveratrol was 1.2 +/- 0.6 microg/g fresh weight.
Verbatim
e0“resveratrol (1.2 +/- 0.6 microg/g of fw of grapes sampled at harvest)”
Claim · model-written summary
O3 treatment increased resveratrol three- to fourfold after shelf life.
- Taxon
- grapese0
- Treatment
- O(3)-treatede0
- Outcome
- resveratrole0
- Direction
- increasese0
- Value
- 3- and 4-folde0
- Qualifier
- after shelf lifee0
Not reportedComparator
Verbatim
e0“large increases were observed after shelf life for resveratrol (1.2 +/- 0.6 microg/g of fw of grapes sampled at harvest), even up to 3- and 4-fold for O(3)-treated grapes and 2-fold for CA-treated ones.”
Claim · model-written summary
CA treatment increased resveratrol twofold after shelf life.
- Taxon
- grapese0
- Treatment
- CA-treatede0
- Outcome
- resveratrole0
- Direction
- increasese0
- Value
- 2-folde0
- Qualifier
- after shelf lifee0
Not reportedComparator
Verbatim
e0“large increases were observed after shelf life for resveratrol (1.2 +/- 0.6 microg/g of fw of grapes sampled at harvest), even up to 3- and 4-fold for O(3)-treated grapes and 2-fold for CA-treated ones.”
Claim · model-written summary
Improved storage techniques seem to maintain or enhance antioxidant compound content.
Verbatim
e0“improved techniques for the keeping quality of cv. Napoleon table grapes during long-term storage seem to maintain or enhance their antioxidant compound content.”
The same questions in other papers
ozone · molecular: metabolites · VitisPositive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- no effect
5 papers more in this group
See all 9 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.