Partial rootzone drying: effects on growth and fruit quality of field-grown grapevines (Vitis vinifera)

Functional Plant Biology : FPB
Tiago P SantosM Manuela Chaves

Abstract

A study to assess the effects of the Partial Rootzone Drying (PRD) irrigation strategy in comparison to other irrigation systems was carried out in southern Portugal in two field-grown grapevines varieties, Moscatel and Castelão. We addressed the question of whether by regulating growth and plant water use, the PRD system would enable an equilibrated vegetative development, leading to a favourable capture of solar radiation for photoassimilate production and, at the same time to provide an optimum environment for fruit maturation. Three irrigation schemes were applied in addition to the non-irrigated (NI) vines: partial root drying (PRD), 50% of crop evapotranspiration (ETc), supplied to only one side of the root system while the other one was allowed to dry, alternating sides every 15 days; deficit irrigated (DI), 50% ETc supplied, half to each side of the root system and full irrigated (FI, 100% ETc). During the whole season FI plants of both varieties exhibited a high leaf predawn water potential (ψpd , ca-0.2MPa) while a progressive decline was observed in NI plants, reaching ψpd values near -0.7 MPa at the end of August. PRD and DI presented intermediate values. PRD vines exhibited a stronger control over vegetative growth...Continue Reading

Citations

Jul 27, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J I L MorisonW J Davies
Jan 12, 2013·International Journal of Biometeorology·H FragaJ A Santos
Aug 17, 2016·Journal of the Science of Food and Agriculture·Filipa S GriloRiccardo Lo Bianco
Nov 5, 2014·Journal of the Science of Food and Agriculture·Maria R ConesaAlejandro Pérez-Pastor
Jan 30, 2016·International Journal of Biometeorology·María Fernanda CabréMario Nuñez
Jun 6, 2009·Journal of Experimental Botany·Ian C Dodd
Jan 8, 2021·BMC Plant Biology·Massimiliano TrentiFrancesco Emanuelli

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