Abstract
The Vitis vinifera cultivar Crimson Seedless primarily accumulates the anthocyanin peonidin-3-glucoside. The research undertook the study of two factors which could influence the accumulation of anthocyanin in grape berry skins: ethephon application and shade. Ethephon treatment at 200ppm applied one week post-vraison significantly increased the concentration of all anthocyanins in berry skins. Peonidin-3-glucoside was found to increase most significantly in response to ethephon application, and was increased 150% compared with an untreated control. The proportion of 3-monoglucoside anthocyanins increased in response to ethephon application. A shading treatment did not affect total anthocyanin concentration in berry skins, but the anthocyanin cyanidin-3-glucoside was decreased significantly by shade. Its content was 50% of a sun-exposed control. The observed effects were found to occur at two sites at which the experiment was performed in the Hex River and Paarl regions. Colour development in the Vitis vinifera cultivar Crimson Seedless does not appear to be influenced significantly by bunch shading. The use of commercial growth regulators like ethephon exert a strong influence on anthocyanin production in grape skins of this cultivar, and are therefore a more likely solution to overcome poor colour development in its production.
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Claims 7
Claim · model-written summary
Ethephon at 200ppm applied one week post-vraison significantly increased the concentration of all anthocyanins in Crimson Seedless berry skins.
- Taxon
- Vitis vinifera
Vitis viniferat0 - Material
- Crimson Seedlesst0
- Organ / stage
- berry skinse0
- Treatment
- Ethephon treatment at 200ppme0
- Outcome
- concentration of all anthocyaninse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera L. cv. Crimson Seedless”
e0“Ethephon treatment at 200ppm applied one week post-vraison significantly increased the concentration of all anthocyanins in berry skins”
Claim · model-written summary
Peonidin-3-glucoside increased most strongly with ethephon, by 150% compared with an untreated control.
- Taxon
- Vitis viniferaVitis viniferat0
- Material
- Crimson Seedlesst0
- Treatment
- ethephon applicatione0
- Outcome
- Peonidin-3-glucosidee0
- Direction
- increasede0
- Value
- 150%e0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera L. cv. Crimson Seedless”
e0“Peonidin-3-glucoside was found to increase most significantly in response to ethephon application, and was increased 150% compared with an untreated control”
Claim · model-written summary
The proportion of 3-monoglucoside anthocyanins increased with ethephon application.
- Taxon
- Vitis viniferaVitis viniferat0
- Material
- Crimson Seedlesst0
- Treatment
- ethephon applicatione0
- Outcome
- proportion of 3-monoglucoside anthocyaninse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera L. cv. Crimson Seedless”
e0“The proportion of 3-monoglucoside anthocyanins increased in response to ethephon application”
Claim · model-written summary
Shading did not affect total anthocyanin concentration in berry skins.
- Taxon
- Vitis viniferaVitis viniferat0
- Material
- Crimson Seedlesst0
- Organ / stage
- berry skinse0
- Treatment
- shading treatmente0
- Outcome
- total anthocyanin concentratione0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera L. cv. Crimson Seedless”
e0“A shading treatment did not affect total anthocyanin concentration in berry skins”
Claim · model-written summary
Shade significantly decreased cyanidin-3-glucoside, whose content was 50% of a sun-exposed control.
- Taxon
- Vitis viniferaVitis viniferat0
- Material
- Crimson Seedlesst0
- Treatment
- shadee0
- Outcome
- anthocyanin cyanidin-3-glucosidee0
- Direction
- decreasede0
- Value
- 50%e0
- Comparator
- sun-exposed controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera L. cv. Crimson Seedless”
e0“the anthocyanin cyanidin-3-glucoside was decreased significantly by shade. Its content was 50% of a sun-exposed control”
Claim · model-written summary
The observed effects occurred at both experimental sites, in the Hex River and Paarl regions.
- Taxon
- Vitis viniferaVitis viniferat0
- Material
- Crimson Seedlesst0
- Outcome
- observed effects were found to occur at two sitese0
- Setting
- Hex River and Paarl regionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera L. cv. Crimson Seedless”
e0“The observed effects were found to occur at two sites at which the experiment was performed in the Hex River and Paarl regions”
Claim · model-written summary
The authors conclude that commercial growth regulators like ethephon are a more likely solution than shading to overcome poor colour development in grape production.
Verbatim
e0“The use of commercial growth regulators like ethephon exert a strong influence on anthocyanin production in grape skins of this cultivar, and are therefore a more likely solution to overcome poor colour development in its production”
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See all 10 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.