Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/51163

TítuloKaolin exogenous application boosts antioxidant capacity and phenolic content in berries and leaves of grapevine under summer stress
Autor(es)Dinis, L. T.
Bernardo, S.
Conde, A.
Pimentel, D.
Ferreira, H.
Felix, L.
Gerós, H.
Correia, C. M.
Moutinho-Pereira, J.
Palavras-chaveVitis vinifera
Oxidative stress
ROS
Antioxidants
Scavenging systems
Data2016
EditoraElsevier
RevistaJournal of Plant Physiology
Resumo(s)Heat waves, high light intensities and water deficit are becoming important threats in many important viticultural areas worldwide, so the implementation of efficient and cost-effective mitigation strategies is crucial for the production of premium wines while maintaining productivity. In this context, the foliar application of kaolin, a chemically inert mineral with excellent reflective properties, is being developed and experimented as a strategy to reduce the impact of heat and drought in Douro vineyards (Northern Portugal), already revealing promising results. In the present study we investigated if an improved antioxidant capacity is part of the beneficial effects of kaolin, by studying changes in the enzymatic and nonenzymatic antioxidant system in leaves and berries (cv Touriga Nacional). Results showed that mature grape berries contained higher amounts of total phenols (40%), flavonoids (24%), anthocyanins (32%) and vitamin C (12%) than fruits from control vines, and important changes were also measured in leaves. In parallel, kaolin application improved the antioxidant capacity in berries, which was correlated with the observed increased content in secondary metabolites. Kaolin application also regulated secondary metabolism at the transcriptional level through the increase in the transcript abundance of genes encoding phenylalanine ammonia lyase and chalcone synthase.
Tipoarticle
URIhttp://hdl.handle.net/1822/51163
DOI10.1016/j.jplph.2015.12.005
ISSN0176-1617
Arbitragem científicayes
AcessoclosedAccess
Aparece nas coleções:DBio - Artigos/Papers

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Kaolin exogenous application boosts antioxidant capacity .pdf505,1 kBAdobe PDFVer/Abrir  Solicitar cópia ao autor!

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu Currículo DeGóis