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Utjecaj oplodnje na kemijski sastav grožđa sorte ‘Grk’ (Vitis vinifera L.)
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Grk bijeli sorta je vinove loze usko vezana za mjesto Lumbarda na otoku Korčuli. Jedna je od rijetkih sorata koja posjeduje funkcionalno ženski tip cvijeta. Zbog nepravilnosti u građi cvijeta te često sterilnog polena dolazi do lošije oplodnje. U grozdu se formiraju velike, sjemene bobe te male besjemene bobe – „pasoline”. Uslijed lošije oplodnje dolazi do većeg udjela pasolina u grozdu te nižeg priroda. Pretpostavlja se kako oplođene i neoplođene bobe imaju različita kemijska svojstva te se samim time izravno povezuje razina oplodnje i kvaliteta vina Grk. U ovom istraživanju utvrđen je kemijski sastav sjemenih boba i pasolina. Od polifenolnih spojeva pasoline su sadržavale značajno više koncentracije gotovo svih flavonoidnih spojeva, kumarinske kiseline, ferulinske kiseline te resveratrola. S druge strane, sjemene bobe bile su bogatije kaftarinskom, fertarinskom te kafeinskom kiselinom. Značajnih razlika u osnovnim pokazateljima kakvoće mošta nije bilo.
Title: Utjecaj oplodnje na kemijski sastav grožđa sorte ‘Grk’ (Vitis vinifera L.)
Description:
Grk bijeli sorta je vinove loze usko vezana za mjesto Lumbarda na otoku Korčuli.
Jedna je od rijetkih sorata koja posjeduje funkcionalno ženski tip cvijeta.
Zbog nepravilnosti u građi cvijeta te često sterilnog polena dolazi do lošije oplodnje.
U grozdu se formiraju velike, sjemene bobe te male besjemene bobe – „pasoline”.
Uslijed lošije oplodnje dolazi do većeg udjela pasolina u grozdu te nižeg priroda.
Pretpostavlja se kako oplođene i neoplođene bobe imaju različita kemijska svojstva te se samim time izravno povezuje razina oplodnje i kvaliteta vina Grk.
U ovom istraživanju utvrđen je kemijski sastav sjemenih boba i pasolina.
Od polifenolnih spojeva pasoline su sadržavale značajno više koncentracije gotovo svih flavonoidnih spojeva, kumarinske kiseline, ferulinske kiseline te resveratrola.
S druge strane, sjemene bobe bile su bogatije kaftarinskom, fertarinskom te kafeinskom kiselinom.
Značajnih razlika u osnovnim pokazateljima kakvoće mošta nije bilo.
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