Claim · model-written summary
Leaf shading affected the timing and magnitude of sugar accumulation in berries.
- Taxon
- Vitis vinifera
Vitis viniferae0 - Treatment
- Leaf shadinge1
- Outcome
- timing and the magnitude of sugar accumulatione1
Not reportedDirection
Verbatim
e0“Grape vines (Vitis vinifera L. cv. Cabernet Sauvignon) were selectively shaded with polypropylene doth to separate the effects of shading fruit from the effects of shading foliage”
e1“Shading the foliage led to both a delay and a decrease in berry growth. Leaf shading also affected the timing and the magnitude of sugar accumulation”
Title
Differential effects of shading fruit or foliage on the development and composition of grape berries
Rojas-Lara, B. A.; Morrison, Janice C. Julius Kühn-Institut 2015. doi:10.5073/vitis.1989.28.199-208
Other claims from this paper (12)
- Intervention effect Shading the foliage decreased berry growth.
- Intervention effect Shading the foliage delayed berry growth.
- Intervention effect Shading reduced total sugar per berry more than it reduced sugar concentration.
- Intervention effect Rate of pre-veraison malate accumulation was lower with increasing foliage shade than in fully sun-exposed vines.
- Intervention effect Maximum malate content at veraison was lower with increasing foliage shade than in fully sun-exposed vines.
- Intervention effect Rate of post-veraison malate loss was highest in fully sun-exposed vines.
- Intervention effect Tartaric acid was significantly lower in fruit of heavily shaded vines than in more exposed treatments.
- Association Leaf shading was significantly associated with increased potassium concentration in the fruit.
- Association Juice pH was more closely correlated with tartaric acid and potassium concentrations than with malate content.
- Intervention effect Grapes from heavily shaded vines had the highest pH.
- Intervention effect Anthocyanin accumulation was affected more by cluster shading than by leaf shading.
- Intervention effect Shaded fruit had significantly less anthocyanin than sun-exposed fruit.