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Deficit irrigation in grapevine improves water-use efficiency while controlling vigour and production quality

dc.contributor.authorChaves, Maria Manuela
dc.contributor.authorSantos, Tiago P.
dc.contributor.authorSouza, Cláudia R. de
dc.contributor.authorOrtuño, M. F.
dc.contributor.authorRodrigues, M. Lucília
dc.contributor.authorLopes, Carlos Manuel Antunes
dc.contributor.authorMaroco, João
dc.contributor.authorPereira, João Santos
dc.date.accessioned2012-09-18T18:17:30Z
dc.date.available2012-09-18T18:17:30Z
dc.date.issued2007
dc.description.abstractGrapevine irrigation is becoming an important practice to guarantee wine quality or even plant survival in regions affected by seasonal drought. Nevertheless, irrigation has to be controlled to optimise source to sink balance and avoid excessive vigour. The results we present here in two grapevine varieties (Moscatel and Castela ˜o) during 3 years, indicate thatwe can decrease the amount ofwater applied by 50%(as in deficit irrigation, DI, and in partial root drying, PRD) in relation to full crop’s evapotranspiration (ETc) [full irrigated (FI) vines] with no negative effects on production and even get some gains of quality (in the case of PRD).We report that in non-irrigated and in several cases in PRD vines exhibit higher concentrations of berry skin anthocyanins and total phenols than those presented by DI and FI vines.We showed that these effects on quality weremediated by a reduction in vigour, leading to an increase on light interception in the cluster zone. Because plant water status during most of the dates along the season was not significantly different between PRD and DI, and when different, PRD even exhibited a higher leaf water potential than DI vines, we conclude that growth inhibition in PRD was not a result of a hydraulic control. The gain in crop water use in DI and PRD was accompanied by an increase of the δ13 C values in the berries in DI and PRD as compared to FI, suggesting that we can use this methodology to assess the integrated water-use efficiency over the growing season.por
dc.identifier.citationAnnals of Applied Biology, 150, 237-252por
dc.identifier.issn0003-4746
dc.identifier.urihttp://hdl.handle.net/10400.12/1704
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherWiley-Blackwellpor
dc.subjectDeficit irrigationpor
dc.subjectGrapevinespor
dc.subjectProductionpor
dc.subjectVigourpor
dc.subjectWater-use efficiencypor
dc.titleDeficit irrigation in grapevine improves water-use efficiency while controlling vigour and production qualitypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceOxfordpor
oaire.citation.endPage252por
oaire.citation.startPage237por
oaire.citation.titleAnnals of Applied Biologypor
oaire.citation.volume150por
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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