Abstract
Yan-73 (Vitis vinifera) is a teinturier grape cultivar, which accumulates anthocyanins in skin, pulp, pedicels, and rachis. The effects of sunlight on anthocyanin biosynthesis and regulation in various tissues of this teinturier cultivar were investigated. Light transmission measurements showed that covering with opaque boxes substantially reduced light intensity around clusters; ≤0.25% of incident light reached the berry skin and <0.05% reached the pulp. The pulp naturally experiences increasing sunlight exclusion by skin during ripening. Sunlight exclusion reduced and delayed anthocyanin biosynthesis in skin and pulp during berry development, while both tissues nevertheless accumulated enough anthocyanins to turn dark red. No strong reduction of anthocyanin concentration was observed in pedicels or rachis. Sunlight exclusion decreased transcript abundance of VvUFGT, VvMybA1, VvMybA2, and VvMyc1 in both skin and pulp and also decreased transcript abundance of VvMycA1 in pulp. Sunlight exclusion differently influenced the anthocyanin components: it decreased the relative proportion of 3′,4′,5′-hydroxylated anthocyanins and increased that of 3′,4′-hydroxylated anthocyanins in berry skin and pulp, which corresponded to the change in the ratio of VvF3′H to VvF3′5′H. These results allow for insight on anthocyanin biosynthesis in various grape tissues in absence of sunlight.
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 10
Claim · model-written summary
Opaque boxes reduced light reaching berry skin to at most 0.25% and pulp to less than 0.05% of incident light.
Verbatim
t0“Grape Cultivar”
e0“covering with opaque boxes substantially reduced light intensity around clusters; ≤0.25% of incident light reached the berry skin and <0.05% reached the pulp”
Claim · model-written summary
The grape pulp experiences increasing exclusion of sunlight by the skin during ripening.
Verbatim
t0“Grape Cultivar”
e0“The pulp naturally experiences increasing sunlight exclusion by skin during ripening”
Claim · model-written summary
Sunlight exclusion reduced and delayed anthocyanin biosynthesis in grape skin and pulp during berry development.
- Taxon
- Grapet0
- Organ / stage
- skin and pulpe0
- Treatment
- Sunlight exclusione0
- Outcome
- anthocyanin biosynthesise0
- Direction
- reduced and delayede0
Not reportedComparator
Verbatim
t0“Grape Cultivar”
e0“Sunlight exclusion reduced and delayed anthocyanin biosynthesis in skin and pulp during berry development”
Claim · model-written summary
Despite sunlight exclusion, grape skin and pulp accumulated enough anthocyanins to turn dark red.
Not reportedDirection
Verbatim
t0“Grape Cultivar”
e0“both tissues nevertheless accumulated enough anthocyanins to turn dark red”
Claim · model-written summary
Sunlight exclusion caused no strong reduction in anthocyanin concentration in grape pedicels or rachis.
- Taxon
- Grapet0
- Organ / stage
- pedicels or rachise0
- Outcome
- anthocyanin concentratione0
- Direction
- No strong reductione0
Not reportedTreatmentComparator
Verbatim
t0“Grape Cultivar”
e0“No strong reduction of anthocyanin concentration was observed in pedicels or rachis”
Claim · model-written summary
Sunlight exclusion decreased VvUFGT, VvMybA1, VvMybA2 and VvMyc1 transcript abundance in grape skin and pulp.
- Taxon
- Grapet0
- Organ / stage
- skin and pulpe0
- Treatment
- Sunlight exclusione0
- Gene
- VvUFGT, VvMybA1, VvMybA2, and VvMyc1e0
- Outcome
- transcript abundancee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
t0“Grape Cultivar”
e0“Sunlight exclusion decreased transcript abundance of VvUFGT, VvMybA1, VvMybA2, and VvMyc1 in both skin and pulp”
Claim · model-written summary
Sunlight exclusion decreased VvMycA1 transcript abundance in grape pulp.
- Taxon
- Grapet0
- Organ / stage
- pulpe0
- Treatment
- Sunlight exclusione0
- Gene
- VvMycA1e0
- Outcome
- transcript abundancee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
t0“Grape Cultivar”
e0“Sunlight exclusion decreased transcript abundance of VvUFGT, VvMybA1, VvMybA2, and VvMyc1 in both skin and pulp and also decreased transcript abundance of VvMycA1 in pulp”
Claim · model-written summary
Sunlight exclusion decreased the relative proportion of 3′,4′,5′-hydroxylated anthocyanins in grape berry skin and pulp.
- Taxon
- Grapet0
- Organ / stage
- berry skin and pulpe0
- Treatment
- Sunlight exclusione0
- Outcome
- relative proportion of 3′,4′,5′-hydroxylated anthocyaninse0
- Direction
- decreasede0
Not reportedComparator
Verbatim
t0“Grape Cultivar”
e0“Sunlight exclusion differently influenced the anthocyanin components: it decreased the relative proportion of 3′,4′,5′-hydroxylated anthocyanins and increased that of 3′,4′-hydroxylated anthocyanins in berry skin and pulp”
Claim · model-written summary
Sunlight exclusion increased the relative proportion of 3′,4′-hydroxylated anthocyanins in grape berry skin and pulp.
- Taxon
- Grapet0
- Organ / stage
- berry skin and pulpe0
- Treatment
- Sunlight exclusione0
- Outcome
- 3′,4′-hydroxylated anthocyaninse0
- Direction
- increasede0
Not reportedComparator
Verbatim
t0“Grape Cultivar”
e0“Sunlight exclusion differently influenced the anthocyanin components: it decreased the relative proportion of 3′,4′,5′-hydroxylated anthocyanins and increased that of 3′,4′-hydroxylated anthocyanins in berry skin and pulp”
Claim · model-written summary
The changes in grape anthocyanin proportions corresponded to a change in the ratio of VvF3′H to VvF3′5′H.
Not reportedDirection
Verbatim
t0“Grape Cultivar”
e0“which corresponded to the change in the ratio of VvF3′H to VvF3′5′H”
e1“Sunlight exclusion differently influenced the anthocyanin components”
The same questions in other papers
light · molecular: expression · VitisPositive and negative results
7 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →light · quality: phytochemicals · VitisPositive and negative results
3 papers in the same direction as this paper · 14 in the opposite direction
- positive
- negative
- positive
14 papers more in this group
See all 18 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.