Abstract
The coloration of grape berries depends on the anthocyanin synthesis during maturation. The quality of berries is often decreased due to the poor color development when berries are grown under unfavorable environments and/or inadequate internal factors are involved. It has been well-known that the level of ABA at ripening is closely associated with anthocyanin synthesis; thus, the external application of ABA results in the increase of anthocyanin content even in berries grown under favorable conditions. However, the agricultural use of natural ABA is not possible because of high prices. This experiment was conducted to study the potential of STC-4771 as a substitute for ABA. The effect of STC-4771 was studied in `Kyoho', `Pione', and `Delaware' grapes. Chemicals were applied when ≈10% of berries in a cluster were colored. In `Kyoho', anthocyanin synthesis was enhanced at a concentration of 100 mg/L and there was a trend in color enhancement in `Pione', regardless of treatment concentration, between 10 to 40 mg/L. However, no clear effect was found in `Delaware' at 50 to 100 mg/L. In an in vitro experiment, anthocyanin was only increased when an adequate amount of sucrose (0.6 m ) was added in the incubation medium under light. Natural ABA effectively increased the anthocyanin content of berry segments even under shading condition through four bagging materials, but no effect was confirmed in STC treatment.
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Claims 6
Claim · model-written summary
STC-4771 at 100 mg/L enhanced anthocyanin synthesis in Kyoho grapes.
Not reportedComparator
Verbatim
e0“In `Kyoho', anthocyanin synthesis was enhanced at a concentration of 100 mg/L”
e1“grapes”
Claim · model-written summary
Pione grapes showed a trend toward stronger color with STC-4771 at 10 to 40 mg/L.
- Taxon
- grapese1
- Material
- Pionee0
- Treatment
- STC-4771e2
- Outcome
- colore0
- Direction
- enhancemente0
- Qualifier
- between 10 to 40 mg/Le0
Not reportedComparator
Verbatim
e0“there was a trend in color enhancement in `Pione', regardless of treatment concentration, between 10 to 40 mg/L”
e1“grapes”
e2“The effect of STC-4771 was studied”
Claim · model-written summary
Delaware grapes showed no clear response to STC-4771 at 50 to 100 mg/L.
Not reportedComparatorDirection
Verbatim
e0“no clear effect was found in `Delaware' at 50 to 100 mg/L”
e1“grapes”
e2“The effect of STC-4771 was studied”
Claim · model-written summary
Berry anthocyanin rose in vitro only with adequate sucrose under light.
- Taxon
- grapese1
- Treatment
- sucrose (0.6 m )e0
- Outcome
- anthocyanine0
- Direction
- increasede0
- Qualifier
- under lighte0
- Setting
- in vitroe0
Not reportedComparator
Verbatim
e0“In an in vitro experiment, anthocyanin was only increased when an adequate amount of sucrose (0.6 m ) was added in the incubation medium under light”
e1“grapes”
Claim · model-written summary
Natural ABA increased berry-segment anthocyanin under shading.
- Taxon
- grapese1
- Organ / stage
- berry segmentse0
- Treatment
- Natural ABAe0
- Outcome
- anthocyanin contente0
- Direction
- increasede0
- Qualifier
- under shading condition through four bagging materialse0
Not reportedComparator
Verbatim
e0“Natural ABA effectively increased the anthocyanin content of berry segments even under shading condition through four bagging materials”
e1“grapes”
Claim · model-written summary
STC treatment showed no confirmed effect under shading.
- Taxon
- grapese2
- Treatment
- STC treatmente0
- Outcome
- effecte0
- Qualifier
- under shading condition through four bagging materialse1
Not reportedComparatorDirection
Verbatim
e0“no effect was confirmed in STC treatment”
e1“under shading condition through four bagging materials”
e2“grapes”
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