POLYPHENOLIC COMPOSITION OF DALMATIAN GRAPEVINE VARIETIES GROWN UNDER

CONTINENTAL CLIMATE

Jasminka Karoglan Kontić1,2, Ivana Tomaz1, Željko Andabaka1, Domagoj Stupić1, Zvjezdana Marković1,

Darko Preiner1,2, Edi Maletić1,2, Mirela Osrečak1, Marko Karoglan1

1Faculty of Agriculture, University of Zagreb, Svetošimunska 25, Zagreb, Croatia

2Centre of Excellence for Biodiversity and Molecular Plant Breeding, Faculty of Agriculture, University of Zagreb, Croatia

INTRODUCTIONMuch of the data acquired during the last few decades suggests that climate changes are taking place. These climate changes, in particular increasingtemperatures, have important consequences on viticulture and different approaches have been proposed for adaptation. Shifting of grape varieties growth fromtheir traditional sites towards a cooler climate is one of them. In Croatia, there are 125 autochthonous grape varieties among them 38 red ones. The greatmajority of red grape varieties are native to the Costal Croatia region, belonging to the wine growing zone CII and Mediterranean climate. The aim of this studywas to investigate the content and composition of individual polyphenolic compounds of 11 Dalmatian varieties which were growing in Zone B with continentalclimate.

RESULTS

CONCLUSION

MATERIALS AND METHODS

ANALYSIS

Extraction HPLC Analysis

The following native grapevine varieties were studied: Teran, Tribidrag, Plavac mali, Dobričić, Lasina, Plavina,Babić, Ninčuša, Vranac, Rudežuša and Ljutun. Since Merlot is used in continental climate for production of highquality red wines, it was used for comparison. The grape berries were sampled in year 2017 at ripening stage(from verasion to full ripeness) from the vineyard located at the Experimental station Jazbina (Zagreb), Facultyof Agriculture, University of Zagreb.

Figure 3. Flavan-3-ols content of grape berriesgrown under continental climate

Figure 2. Flavonol glycosides content of grapeberries grown under continental climate

Figure 1. Anthocyanins content of grape berriesgrown under continental climate

0

10000

20000

30000

40000

50000

60000

9.8. 16.8. 23.8. 30.8. 5.9. 12.9. 19.9. 26.9.

An

tho

cyan

ins

con

ten

t (m

g/k

g)

Harvest time

Merlot

Teran

Tribidrag

Plavac mali

Dobričić

Lasina

Plavina

Babić

Ninčuša

Vranac

Rudežuša

Ljutun 0

100

200

300

400

500

600

700

800

900

1000

9.8. 16.8. 23.8. 30.8. 5.9. 12.9. 19.9. 26.9.

Flav

an-3

-ols

co

nte

nt

(mg

/kg)

Harvest time

Merlot

Teran

Tribidrag

Plavac mali

Dobričić

Lasina

Plavina

Babić

Ninčuša

Vranac

Rudežuša

Ljutun0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

9.8. 16.8. 23.8. 30.8. 5.9. 12.9. 19.9. 26.9.

Flav

on

ol g

lyco

sid

e c

on

ten

t (m

g/k

g)

Harvest time

Merlot

Teran

Tribidrag

Plavac mali

Dobričić

Lasina

Plavina

Babić

Ninčuša

Vranac

Rudežuša

Ljutun0

5000

10000

15000

20000

25000

30000

Merlot Plavac mali

Tota

l co

nte

nt

of

flav

on

oid

s (m

g/k

g)

Mediterraneanclimate

Continental climate

Figure 4. Total content of flavonoids of grapeberries harvest at full ripness

Figure 5. Viticulture climate zonesin Croatia

Figure 6. Change in GDD for Experimental station Jazbina (Zagreb) between 30 years average and year

of research (2017)

Figure 7. Vineyard in Mediterraneanclimate (Island Vis, Dalmatia)

Figure 8. Vineyard in continentalclimate (Experimental station

Jazbina, Zagreb)

➢ This study confirmed signifficant differences among Croatian grape varieties in content of analyzed polyphenolic compounds.➢ More then half of native varieties had higher anthocyanins content then Merlot, confirming that they can be considered suitable for wine production in

continental Croatia.➢ Content of other groups of polyphenolic compounds was also comparable to the previous studies in Mediterranean climate.➢ Croatia has rich grapevine genetic resourses which can be used for adaptation to climatic changes.

This research was funded by: