Effects of Vine Water Status and Exogenous Abscisic Acid on Berry Composition of Three Red Wine Grapes Grown under Mediterranean Climate

Horticulturae

卷:6

Luca Mercenaro¹  Massimiliano Cocco¹  Mauro Lo Cascio¹  Giovanni Nieddu¹ 

[1] Department of Agriculture, University of Sassari, Viale Italia 39, 07100 Sassari, Italy;

关键词: anthocyanin;    water stress;    grapevine;    exogenous aba;    polyphenols;    viticultural practice;   

DOI  :  10.3390/horticulturae6010012

来源: DOAJ

【 摘 要 】

Beyond climatic conditions, qualitative performance is led by the intrinsic characteristics of the genotype. The aim of this study was to investigate the relationship between vine water status and exogenous abscisic acid (ABA) application on berry composition of the cultivars Cannonau, Merlot and Sangiovese. The experiment, carried out in 2016 and 2017, consisted of comparing two levels of irrigation treatments, full irrigation versus a non-irrigation treatment. Within each treatment, two sub-treatments were set up: (i) 4 mL L⁻¹ of exogenous ABA applied at veraison to clusters only and subsequently repeated after six days; (ii) a control (untreated vines). The application of different irrigation regimes confirmed that the response to water stress is highly cultivar-dependent. Berry composition was influenced differently among cultivars by water stress. In terms of metabolites, positive influences were observed with Cannonau. No significant effects were observed by spraying exogenous ABA directly on grapes. Moreover, no significant interactions were found between the application of water stress and ABA. Exogenous ABA application did not appear to be a viticultural practice capable of influencing must composition in environments characterized by severe environmental conditions such as heat and drought.

【 授权许可】

Unknown