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Effects of the atmospheric vapour pressure deficit and soil water availability ...

Grapevine varieties exhibiting differences in stomatal response to water deficit

Abstract. Knowledge on variety traits and physiological responses to stress is still scarce in Vitis vinifera L., limiting the optimisation of irrigation and breeding for high water use efficiency. We have characterised five grapevine varieties using thermal imaging, leaf gas exchange, leaf morphology and carbon isotope composition. Plants of the varieties Aragonez, Trincadeira, Cabernet Sauvignon, Syrah and To...

Influence of soil water content and atmospheric conditions on leaf water potent...

Abstract In this study, the influence of soil and atmosphere conditions on noon and basal leaf water potential of vines ‘‘Touriga Nacional’’ in the Da˜o region submitted to different irrigation treatments is analysed. Both indicators showed to be dependent on environmental conditions at the time of measurement. Leaf water potential at noon of fully watered plants was linearly related with atmospheric conditions...

Impact of irrigation regime on berry development and flavonoids composition in ...

In the present study, field grown Aragonez (Syn. Tempranillo) grapevines (Vitis vinifera L.) were subjected to three irrigation regimes (conventional sustained deficit irrigation (DI), regulated deficit irrigation (RDI) and non-irrigated (NI)) during two successive seasons (2007–2008). An integrative study was performed in grape berry skin tissues at four phenological stages of grape berry (pea size, véraison, ...

Enrelvamento da vinha

Effect of irrigation on soil water depletion, vegetative growth, yield and berr...

Aiming to assess the effects of irrigation amount on vegetative growth, yield and berry composition of the red variety Touriga Nacional (Vitis vinifera L.) a fi eld trial was installed at the “Centro de Estudos Vitivinícolas do Dão”, Nelas, Portugal. The effects of three irrigation treatments (DI30 - 30% of ETc; DI50 - 50% ETc and FI - 100% ETc) were compared to a control non-irrigated (NI) during three growing...