prikaz prve stranice dokumenta Utjecaj oplodnje na sadržaj polifenola u grožđu cv. Grk (V. vinifera L.)
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master's thesis
Utjecaj oplodnje na sadržaj polifenola u grožđu cv. Grk (V. vinifera L.)
Zagreb: University of Zagreb, Faculty of Agriculture, 2016. urn:nbn:hr:204:100484
Ivetac, Valentina
University of Zagreb
Faculty of Agriculture
Viticulture and Enology

Institutional repository: Repository Faculty of Agriculture University of Zagreb

Cite this document

Ivetac, V. (2016). Utjecaj oplodnje na sadržaj polifenola u grožđu cv. Grk (V. vinifera L.) (Master's thesis). Zagreb: University of Zagreb, Faculty of Agriculture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:204:100484

Ivetac, Valentina. "Utjecaj oplodnje na sadržaj polifenola u grožđu cv. Grk (V. vinifera L.)." Master's thesis, University of Zagreb, Faculty of Agriculture, 2016. https://urn.nsk.hr/urn:nbn:hr:204:100484

Ivetac, Valentina. "Utjecaj oplodnje na sadržaj polifenola u grožđu cv. Grk (V. vinifera L.)." Master's thesis, University of Zagreb, Faculty of Agriculture, 2016. https://urn.nsk.hr/urn:nbn:hr:204:100484

Ivetac, V. (2016). 'Utjecaj oplodnje na sadržaj polifenola u grožđu cv. Grk (V. vinifera L.)', Master's thesis, University of Zagreb, Faculty of Agriculture, accessed 26 December 2024, https://urn.nsk.hr/urn:nbn:hr:204:100484

Ivetac V. Utjecaj oplodnje na sadržaj polifenola u grožđu cv. Grk (V. vinifera L.) [Master's thesis]. Zagreb: University of Zagreb, Faculty of Agriculture; 2016 [cited 2024 December 26] Available at: https://urn.nsk.hr/urn:nbn:hr:204:100484

V. Ivetac, "Utjecaj oplodnje na sadržaj polifenola u grožđu cv. Grk (V. vinifera L.)", Master's thesis, University of Zagreb, Faculty of Agriculture, Zagreb, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:204:100484

Metadata
TitleUtjecaj oplodnje na sadržaj polifenola u grožđu cv. Grk (V. vinifera L.)
AuthorValentina Ivetac
MentorEdi Maletić (mentor)
Committee memberEdi Maletić (predsjednik povjerenstva)
Committee memberDarko Preiner (član povjerenstva)
Committee memberJasminka Karoglan-Kontić (član povjerenstva)
Committee memberDomagoj Stupić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Agriculture
(Viticulture and Enology)
Zagreb
Defense date and country2016-07-13, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Agronomy
Viticulture and Enology
Abstract
Grk je autohtona sorta vinove loze čije je najvažnije područje uzgoja u Lumbardi na otoku Korčuli. Specifična je zbog funkcionalno ženskog cvijeta koji sadrži povijene prašnike a pelud je sterilna. Zbog nefunkcionalne peludi ne dolazi do pravilne oplodnje te se na grozdu razvijaju male, besjemene bobice, poznate kao “pasoline”. Omjer „pasolina“ i normalno oplođenih, velikih, bobica u grozdu može biti različit. Ime sorte „Grk“ povezuje se sa lokalnim sinonimom „gark“ odnosno „gorak“ jer vino posjeduje određenu dozu gorčine. Pretpostavka za gorčinu u vinu upravo je pojava malih besjemenih bobica. Ovim je istraživanjem utvrđen sadržaj polifenola, kao nosiocima okusa gorčine, u kožicama i moštu oba tipa bobica. Istraživanjem je utvrđeno da meso malih, besjemenih bobica sadrži više kaftarinske i kafeinske kiseline te katehina. Također, utvrđeno je da je sadržaj flavan-3-ola kod sorte Grk viši u odnosu na ranija istraživanja kod ostalih bijelih sorata iz sličnoga područja uzgoja. Stoga, flavan-3-oli predstavljaju potencijalne nosioce gorčine u vinu kod ove sorte.
Abstract (english)
Grk is indigenous grape variety which is most cultivated in the area of Lumbarda, on the island of Korčula. It is specific for functional female flower, which contains bent stamens and pollen is sterile. Due to the non-functional pollen does not come to the correct fertilization and cluster develops two types of berries: small, seedless berries, known as "pasoline" and normally fertilized, large, berries. The ratio of those two types of berries in a cluster can be different. Variety name "Grk" is associated with a local synonym "gark" or "bitter" because wine has a certain amount of bitterness. The assumption of bitterness in wine has just the appearance of small, seedless berries. This research determined the content of polyphenols, as carriers of bitterness. Anlayzed material includes skin and must of both types of berries. The study found that the meat of small, seedless berries contains great concentration of caftaric and caffeic acid and catechin. It was also found that the content of flavan-3-ol group of polyphenols in this cultivar is higher than in other white skin cultivars from similar area of cultivation. Therefore, flavan-3-ols are potential carriers of bitterness in wine of this variety.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:204:100484
Study programmeTitle: Horticulture
Study programme type: university
Study level: graduate
Academic / professional title: magistar/ magistra inženjer/inženjerka hortikulture (magistar/ magistra inženjer/inženjerka hortikulture)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2016-09-07 06:48:22