Aims: Berry anthocyanin contents were studied in eight different field experiments involving various grapevine (Vitis vinifera L.) cultivars (Syrah, Croatina, Sangiovese, Nebbiolo, Nebbiolo Rosé, Carménere and Cannonau) in a variety of sites located in Northern Italy. Methods and results: In each experiment, global irradiance was reduced by approximately 95% by applying specially designed boxes to selected bunches before the onset of ripening. Variations in anthocyanin accumulation and profile were studied on sun exposed and shaded bunches. Exposed bunches were subjected to less favorable temperatures for biosynthetic metabolism than shaded bunches, due to frequent excessive temperatures around noon. Conclusions: Exposure to direct solar radiation induced an earlier and faster anthocyanin accumulation and a higher anthocyanin concentration across all the experiments, at least from veraison to mid ripening. In fact, the light induced elevated rate of anthocyanin accumulation did not always result in a higher anthocyanin content at grape maturity. In the cultivars with a relatively high proportion of acylated forms, sun exposure resulted in a relative increase in the quantities of non-acylated glucoside forms, while the acylation profile of cultivars that generally had a lower proportion of acylated forms was only minimally influenced by sun exposure. Significance and impact of the study:Akey observation resulting from anthocyanin profiling is the strong positive correlation between light exposure and increases in the percentage of delphinidin-, cyanidin- and petunidin-3-monoglucoside, that is, anthocyanins containing an orthodihydroxyl group.
Bunch exposure to direct solar radiation increase ortho-diphenol anthocyanins in northern Italy climatic condition / L. Rustioni, M. Rossoni, G. Cola, L. Mariani, O. Failla. - In: JOURNAL INTERNATIONAL DES SCIENCES DE LA VIGNE ET DU VIN. - ISSN 1151-0285. - 45:2(2011), pp. 85-99.
Bunch exposure to direct solar radiation increase ortho-diphenol anthocyanins in northern Italy climatic condition
L. RustioniPrimo
;M. RossoniSecondo
;G. Cola;O. Failla
2011
Abstract
Aims: Berry anthocyanin contents were studied in eight different field experiments involving various grapevine (Vitis vinifera L.) cultivars (Syrah, Croatina, Sangiovese, Nebbiolo, Nebbiolo Rosé, Carménere and Cannonau) in a variety of sites located in Northern Italy. Methods and results: In each experiment, global irradiance was reduced by approximately 95% by applying specially designed boxes to selected bunches before the onset of ripening. Variations in anthocyanin accumulation and profile were studied on sun exposed and shaded bunches. Exposed bunches were subjected to less favorable temperatures for biosynthetic metabolism than shaded bunches, due to frequent excessive temperatures around noon. Conclusions: Exposure to direct solar radiation induced an earlier and faster anthocyanin accumulation and a higher anthocyanin concentration across all the experiments, at least from veraison to mid ripening. In fact, the light induced elevated rate of anthocyanin accumulation did not always result in a higher anthocyanin content at grape maturity. In the cultivars with a relatively high proportion of acylated forms, sun exposure resulted in a relative increase in the quantities of non-acylated glucoside forms, while the acylation profile of cultivars that generally had a lower proportion of acylated forms was only minimally influenced by sun exposure. Significance and impact of the study:Akey observation resulting from anthocyanin profiling is the strong positive correlation between light exposure and increases in the percentage of delphinidin-, cyanidin- and petunidin-3-monoglucoside, that is, anthocyanins containing an orthodihydroxyl group.File | Dimensione | Formato | |
---|---|---|---|
Rustioni et al 2011 JISVV 45_2.pdf
accesso riservato
Tipologia:
Publisher's version/PDF
Dimensione
1.69 MB
Formato
Adobe PDF
|
1.69 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.