Dynamics of oil quality parameters changes related to olive fruit fly attack (CROSBI ID 161762)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Koprivnjak, Olivera ; Dminić, Ivana ; Kosić, Urška ; Majetić, Valerija ; Godena, Sara ; Valenčič, Vasilij
engleski
Dynamics of oil quality parameters changes related to olive fruit fly attack
In order to evaluate the role of intrinsic characteristics of olive cultivars on dynamics of oil quality parameters changes related to the olive fruit fly (Bactrocera oleae (Gmelin)) attack, two specific olive cultivars were compared, Istarska bjelica and Buža. Istarska bjelica is characterised by late ripening, a lower flesh/stone mass ratio and higher oleic/linoleic ratio, the total phenols content and oil mass fraction compared to Buža. Oil samples were obtained at two harvesting dates, from fruit lots with 0%, 25%, 50%, 75% and 100% of infestation degree, as mass ratio. Oil and water content in olive paste, as well as total phenols, fatty acids composition and standard chemical and sensorial oil quality parameters were determined. At equal maturity level, the cultivar with a higher oil (24±1% vs. 16±1%) and lower water content (54±2% vs. 61±4%) was more susceptible to hydrolytic degradation, while the one with the lower total phenols content (231±32 mg/kg vs. 575±124 mg/kg) and oleic/linoleic fatty acid ratio (5.7 vs. 9.1) was more liable to oxidative deterioration of oil. Lower susceptibility to negative flavours formation could be related to the absence of ripening induced by fly attack and less favourable environment for larvae growth (higher total phenols content, lower water content and flesh/stone mass ratio).
Olive fruit fly; Bactrocera oleae; oil quality; olive cultivars
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Podaci o izdanju
112 (9)
2010.
1033-1040
objavljeno
1438-7697
10.1002/ejlt.201000298
Povezanost rada
Poljoprivreda (agronomija), Prehrambena tehnologija