Naslov
Quality changes of strawberries during storage

Autori
Terpinc, Petra ; Zlatić, Emil ; Hribar, Janez ; Tojnko, Stanislav ; Vidrih, Rajko ; Pedisić, Sandra ; Elez Garofulić, Ivona

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
4th Postharvest symposium of Western Balkan countries / - , 2013

Skup
4th Postharvest symposium of Western Balkan countries

Mjesto i datum
Ljubljana, Slovenija, 26.09.2013. - 27.09.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
strawberries; preharvest and postharvest treatment; chitosan

Sažetak
Strawberries are a nonclimacteric fruit characterized by a short postharvest life that limits their marketing. They are susceptible to mechanical injury, drying, decay and physiological disorders during storage. Altough the grey mold and Rhizopus rot are two main pathogens infections from Penicillium ssp. (blue mold) also occus occasionally. In this study, effect of preharvest (non) fungicide treatment and postharvest treatment on decay development and quality parameters was studied. Strawberries of the cultivar Clery were harvested in the eastern Slovenia at red ripe maturity stage. Plants were grown inside the tunnels or outside (without any proection). Fruits were further grouped according to the different cultivation techniques (integrated pest management, ecological farming or non fungicide treatment)and stored under normal or modified atmosphere (Xtend)at 1oC for 7 days. In second experiment, non sprayed, in tunnel grown strawberries were subjected ti the chitosan dip treatment, with or without the addition of ascorbic acid and stored under normal atmosphere for 14 days. Based on the results obtained, for the outside cultivation the use of pesticides was required, otherwise the crop failure was more than 50 % after one week storage. On the other hand, in tunnels, where strawberries were produced with ecological fungicide or even without any pesticides, the decay development was still well reduced. Futher, modified atmosphere did not extend strawberrie's shelf life or improve their quality. On the contrary, the use of chitosan was effective, after two weeks of storage experiment the decay was reduced for around 20% when compared to the control. Chitosan was more effective without ascorbic acid. After decay evaluation, compositional changes were estimated. According to our investigation, the content of total soluble solids and total acids were practically constant throughout the storage. With the exception of strawberries from integrated farming, which were grown in tunnel, there were no significant differences between tested groups. Furthermore, it seems like the modified atmosphere did not affect those values either. The vit C was negatively affected during storage and also determined by cultivation type, the highest contents were achieved for integrated pest management regardless were they were grown. On the contrary, different preharvest pesticeds treatments did not significantly affect the aroma profile of strawberries. Ethyl acetate, ethanol, ethyl butanoat, butyl acetate, ethyl hexanoat, hexyl acetat and acetic acid increased during storage, while nerolidol, ethyl hexanoat, metil butanoat, 2-methyl-ethyl-butanoat and buthyl butanoat decreased during storage. Even after 4 days of storage, there were still traces of fludioxonil and fenhexamide in strawberries from integated farming, meanwhile cypronidil was not found in any sample. Finally, all tested samples were negative for patulin and ochratoxin analysis.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA