Claim · model-written summary
Early defruiting increased total nonstructural carbohydrates in grapevine wood to a lesser extent than in roots.
- Organ / stage
- woode1
- Treatment
- Early defruitinge1
- Outcome
- total nonstructural carbohydrates (TNC)e1
- Direction
- increasede1
- Qualifier
- to a lesser extente1
VitisNot reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of grapevine carbohydrate reserves”
e1“Early defruiting over two consecutive seasons increased total nonstructural carbohydrates (TNC) in the roots, and to a lesser extent in the wood, and resulted in yield increases of up to 60% in the third season when fruit was allowed to remain on the vine until harvest”
Title
Jason P. Smith; Bruno P. Holzapfel American Journal of Enology and Viticulture 2009. doi:10.5344/ajev.2009.60.4.461
Other claims from this paper (10)
- Intervention effect Early defruiting over two consecutive seasons increased total nonstructural carbohydrates in grapevine roots.
- Intervention effect Early defruiting over two seasons increased grapevine yield by up to 60% in the third season when fruit remained on the vine until harvest.
- Intervention effect Defoliation at harvest caused a decline in total nonstructural carbohydrate concentrations in grapevine.
- Intervention effect Defoliation at harvest reduced grapevine fruit production by up to 22% following one season of treatment.
- Intervention effect Defoliation at harvest reduced grapevine fruit production by 50% following two seasons.
- Association Higher yields after two seasons of early defruiting were associated with depletion of carbohydrate reserves between budbreak and harvest.
- Observation Carbohydrate reserve restoration in the high-yielding vines did not take place until after harvest.
- Observation In lower-yielding, previously defoliated vines, carbohydrate reserves were restored before fruit maturity.
- Mechanism The authors propose that carbon demand of ripening fruit and post-harvest photoassimilation capacity can both limit restoration of carbohydrate reserves.
- Mechanism The authors attribute marked between-site differences in seasonal maxima of nonstructural carbohydrates in perennial tissues to water deficits.