Abstract
Cv ‘Doña María’ table grape is a high-quality table grape variety included in the Protected Designation of Origin (PDO) of the European Union “The bagged grape of the Vinalopó”. The PDO stipulates that grape clusters must be protected with paper bags from inclement weather and insects, which helps enhance the final grape quality. However, ‘Doña María’ is a variety prone to high shattering in the late stages of ripening on the vine and during postharvest. Inorganic calcium treatments are one of the most commonly used tools to reduce this disorder, but the translocation of this mineral from veraison onward has been questioned. In this study, five applications were performed, from veraison to harvest, using sorbitol-chelated calcium (0.7% + 1.0%), Ca(NO3)2 (Ca) at 0.7% and sorbitol at 1%. It was observed that bagged grapes (not wetted with the solutions) only increased the concentration of total and bound calcium when treated with sorbitol–Ca. This resulted in reduced berry drop during cultivation and postharvest and improved fruit firmness. Additionally, it reduced grape metabolism indicators such as respiration rate, weight loss, malic acid degradation, prevented abscisic acid (ABA) and malondialdehyde (MDA) accumulation, and favored the accumulation of secondary metabolites such as total polyphenols, increased antioxidant activity, and sugar content. The application of sorbitol-chelated calcium is an effective and safe tool that enhances fruit quality and prevents losses due to shattering during postharvest.
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Claims 8
Claim · model-written summary
Sorbitol-calcium increased total and bound calcium in bagged grapes.
- Taxon
- grapese0
- Treatment
- sorbitol–Cae0
- Outcome
- concentration of total and bound calciume0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“bagged grapes (not wetted with the solutions) only increased the concentration of total and bound calcium when treated with sorbitol–Ca.”
Claim · model-written summary
Sorbitol-calcium reduced berry drop during cultivation and postharvest.
Not reportedComparator
Verbatim
e0“This resulted in reduced berry drop during cultivation and postharvest”
e1“bagged grapes (not wetted with the solutions) only increased the concentration of total and bound calcium when treated with sorbitol–Ca.”
Claim · model-written summary
Sorbitol-calcium improved fruit firmness.
Not reportedComparator
Verbatim
e0“improved fruit firmness.”
e1“bagged grapes (not wetted with the solutions) only increased the concentration of total and bound calcium when treated with sorbitol–Ca.”
Claim · model-written summary
Sorbitol-calcium reduced respiration rate, weight loss and malic acid degradation.
- Taxon
- grapee0
- Treatment
- sorbitol-chelated calciume1
- Outcome
- respiration rate, weight loss, malic acid degradatione0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“it reduced grape metabolism indicators such as respiration rate, weight loss, malic acid degradation”
e1“The application of sorbitol-chelated calcium”
Claim · model-written summary
Sorbitol-calcium prevented ABA and MDA accumulation.
- Taxon
- grapee2
- Treatment
- sorbitol-chelated calciume1
- Outcome
- abscisic acid (ABA) and malondialdehyde (MDA) accumulatione0
- Direction
- preventede0
Not reportedComparator
Verbatim
e0“prevented abscisic acid (ABA) and malondialdehyde (MDA) accumulation”
e1“The application of sorbitol-chelated calcium”
e2“grape metabolism indicators”
Claim · model-written summary
Sorbitol-calcium favored total polyphenol accumulation.
Not reportedComparator
Verbatim
e0“favored the accumulation of secondary metabolites such as total polyphenols”
e1“The application of sorbitol-chelated calcium”
e2“grape metabolism indicators”
Claim · model-written summary
Sorbitol-calcium increased antioxidant activity and sugar content.
- Taxon
- grapee2
- Treatment
- sorbitol-chelated calciume1
- Outcome
- antioxidant activity, and sugar contente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“increased antioxidant activity, and sugar content.”
e1“The application of sorbitol-chelated calcium”
e2“grape metabolism indicators”
Claim · model-written summary
Authors recommend sorbitol-chelated calcium to improve fruit quality and prevent postharvest shattering.
Verbatim
e0“The application of sorbitol-chelated calcium is an effective and safe tool that enhances fruit quality and prevents losses due to shattering during postharvest.”
t0“Table Grapes”
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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.