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- W3081250611 abstract "Although deficit irrigation is used to improve fruit quality in healthy grapevines, it can potentially amplify negative effects of viral disease and reduce fruit quality in Grapevine Red Blotch Virus (GRBV) infected grapevines. Therefore, a two-year field experiment was conducted to understand the interaction between GRBV infection and water deficits on disease development and vine physiology. “Wet” vines were irrigated at 100% of estimated crop evapotranspiration (ETc), while “Dry” vines received water at 66 and 50% ETc in 2017 and 2018, respectively. Healthy (GRBV-) and infected (GRBV+) vines were confirmed by PCR assays. There were no significant effects of water deficits on foliar symptom onset in either year, but more severe water deficits in 2018 resulted in a more rapid symptom progression. GRBV+ vines had a higher stem compared to GRBV-vines, but the effects of disease status only appeared post-veraison and corresponded to decreased leaf gas exchange. In general, vine vegetative and reproductive growth were not reduced in GRBV+ vines. Yields were highest in Wet/GRBV+ vines due to larger clusters containing larger berries. Consistent treatment effects on berry primary chemistry were limited to sugars, with no interactions between factors. Water deficits were able to somewhat increase berry anthocyanin concentration in GRBV+ fruit, but the effects were dependent on year. By comparison, disease status and water deficits interacted on skin tannins concentration such that they were decreased in Dry/GRBV+ vines, but increased in Dry/GRBV- vines. Water deficits had no effect on seed phenolics, with only disease status having a significant reduction. Although keeping GRBV+ vines well-watered may mitigate some of the negative effects of GRBD, these results suggest that water deficits will not improve overall fruit quality in GRBV+ vines. Ultimately, the control of fruit ripening imparted by GRBV infection seems to be stronger than abiotic control imparted by water deficits." @default.
- W3081250611 created "2020-09-01" @default.
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- W3081250611 date "2020-08-21" @default.
- W3081250611 modified "2023-09-27" @default.
- W3081250611 title "Water Deficits Do Not Improve Fruit Quality in Grapevine Red Blotch Virus-Infected Grapevines (Vitis vinifera L.)" @default.
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- W3081250611 doi "https://doi.org/10.3389/fpls.2020.01292" @default.
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