Naslov
Influence of early and late fruit zone leaf removal on the dynamics of anthocyanin accumulation in cv. Merlot in North Dalmatia

Autori
Pavlović, Marina ; Zorić, Zoran ; Pedisić, Sandra ; Preiner, Darko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 9th International CONGRESS of Food Technologists, Biotechnologists and Nutritionists / Kovačević Ganić, Karin - Zagreb : Hrvatsko društvo prehrambenih tehnologa, biotehnologa i nutricionista, 2018, 60-64

ISBN
978-953-99725-7-6

Skup
9th International Congress of Food Technologists, Biotechnologists and Nutritionist

Mjesto i datum
Zagreb, Hrvatska, 03.10.2018. - 06.10.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
anthocyanins, Merlot grape, defoliation time

Sažetak
Biosynthesis of anthocyanins is one of the most important biochemical processes, which occur during the growth and development of grape of red cultivars. Anthocyanins are water-soluble pigments present in the vacuoles of the skin cells responsible for the red colour of berry and wines. Increased sunlight exposure enhances the biosynthesis of flavonoids especially anthocyanins during grape ripening. Different timing of partial fruit zone leaf removal can have significant effect on dynamics and total content of anthocyanins in grape. Cv. Merlot was introduced in North Dalmatia by the end of 20th century. This area is characterised by Mediterranean climate, but grapes from some sites with deep fertile soils can result in low level of grape anthocyanins. The aim of this research was to identify the effect of two different timing of fruit zone leaf removal performed (1) during flowering and (2) during veraison on dynamics of anthocyanins accumulation in grapes of Merlot cultivar in comparison to undefoliated control. Berries samples were collected every 10 days starting from veraison to full maturity. Identification and quantification of anthocyanins were conducted by HPLC method. The total anthocyanin content (TAC) ranged from 60.90 to 192.62 mg/100 g berries and from 52.02 to 183.39 mg/100 g berries at the flowering and veraison defoliation, respectively. In control samples TA ranged from 35.12 to 215.14 mg/100 g. The statistical analysis showed that different defoliation time had significant impact on the anthocyanin concentrations of ‘Merlot’ cultivar grown in North Dalmatia.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija), Prehrambena tehnologija

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