Post on 25-Jul-2020
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
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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
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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
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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
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15000
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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: