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The potential effect of pre-inoculation of processing tomato (Solanum lycopersicum L.) plants with arbuscular mycorrhizal fungi (AMF) on yield and fruit properties was investigated in conventional production. Tomato seeds were sown in seedling trays filled with a substrate non-inoculated (AMF-) or inoculated (AMF+) by selected mycorrhizal strains. Seedlings were transplanted in Terra rossa soil and grown in conditions with mineral fertilization and irrigation. Tomato fruits were sampled at harvest. Tomato plants under both treatments had high levels of mycorrhizal colonization, due to applied inoculum (AMF+) or indigenous (AMF-) inoculum present in the soil. Applied AMF+ treatment increased P and decreased K content in tomato fruits. Content of trace elements such as As and V significantly increased, while Pb content significantly decreased in the fruits of AMF+ when compared to the AMF- treatment. No significant effect of AMF+ treatment was observed on yield, fruit quality (soluble solids, pH, total acidity, fruit firmness), lycopene and antioxidant activity of tomato fruits. The overall results suggest that processing tomato is highly susceptible to the indigenous AMF, while seedlings inoculation with selected AMF improves only total phenolic and P fruit content. This means that AMF have a potential application in commercial processing tomato production, however a targeted adaptation of management decissions is required for more extensive results., Potencijalni utjecaj inokulacije presadnica industrijske rajčice (Solanum lycopersicum L.) selekcioniranim arbuskularnim mikoriznim gljivama (AMF), na prinos i svojstva ploda, istražen je u konvencionalnoj proizvodnji. Sjeme rajčice posijano je u polistirenske kontejnere s neinokuliranim (AMF-) ili mikorizama inokuliranim (AMF+) supstratom. Presadnice su posađene u crvenicu, u proizvodnim uvjetima s mineralnom gnojidbom i navodnjavanjem. Uzorkovanje plodova industrijske rajčice provedeno je u berbi. Kod oba tretmana utvrđen je visoki postotak kolonizacije selekcioniranim mikorizama (AMF+) i nativnim vrstama (AMF-) prisutnim u tlu. Plodovi rajčice s AMF+ biljaka imali su veći sadržaj P i manji sadržaj K u odnosu na AMF- tretman. Sadržaj As i V bio je signifikantno veći, dok je sadržaj Pb bio signifikantno manji u AMF+ u usporedbi s AMF- tretmanom. Signifikantan učinak tretmana AMF+ na prinos, kvalitetu ploda (suha tvar, pH, ukupna kiselost, čvrstoća ploda), likopen i antioksidacijsku aktivnost je izostao. Temeljem dobivenih rezultata možemo zaključiti da je industrijska rajčica podložna nativnim AMF, dok je ciljana inokulacija presadnica AMF značajno povećala ukupni sadržaj fenola i P. Dobiveni rezultati ukazuju na potencijalnu primjenu AMF u komercijalnoj proizvodnji industrijske rajčice, međutim prethodna prilagodba uzgojnih uvjeta je neophodna za postizanje značajnijih rezultata.

The potential effect of pre-inoculation of processing tomato (Solanum lycopersicum L.) plants with arbuscular mycorrhizal fungi (AMF) on yield and fruit properties was investigated in conventional production. Tomato seeds were sown in seedling trays filled with a substrate non-inoculated (AMF-) or inoculated (AMF+) by selected mycorrhizal strains. Seedlings were transplanted in Terra rossa soil and grown in conditions with mineral fertilization and irrigation. Tomato fruits were sampled at harvest. Tomato plants under both treatments had high levels of mycorrhizal colonization, due to applied inoculum (AMF+) or indigenous (AMF-) inoculum present in the soil. Applied AMF+ treatment increased P and decreased K content in tomato fruits. Content of trace elements such as As and V significantly increased, while Pb content significantly decreased in the fruits of AMF+ when compared to the AMF- treatment. No significant effect of AMF+ treatment was observed on yield, fruit quality (soluble solids, pH, total acidity, fruit firmness), lycopene and antioxidant activity of tomato fruits. The overall results suggest that processing tomato is highly susceptible to the indigenous AMF, while seedlings inoculation with selected AMF improves only total phenolic and P fruit content. This means that AMF have a potential application in commercial processing tomato production, however a targeted adaptation of management decissions is required for more extensive results., Potencijalni utjecaj inokulacije presadnica industrijske rajčice (Solanum lycopersicum L.) selekcioniranim arbuskularnim mikoriznim gljivama (AMF), na prinos i svojstva ploda, istražen je u konvencionalnoj proizvodnji. Sjeme rajčice posijano je u polistirenske kontejnere s neinokuliranim (AMF-) ili mikorizama inokuliranim (AMF+) supstratom. Presadnice su posađene u crvenicu, u proizvodnim uvjetima s mineralnom gnojidbom i navodnjavanjem. Uzorkovanje plodova industrijske rajčice provedeno je u berbi. Kod oba tretmana utvrđen je visoki postotak kolonizacije selekcioniranim mikorizama (AMF+) i nativnim vrstama (AMF-) prisutnim u tlu. Plodovi rajčice s AMF+ biljaka imali su veći sadržaj P i manji sadržaj K u odnosu na AMF- tretman. Sadržaj As i V bio je signifikantno veći, dok je sadržaj Pb bio signifikantno manji u AMF+ u usporedbi s AMF- tretmanom. Signifikantan učinak tretmana AMF+ na prinos, kvalitetu ploda (suha tvar, pH, ukupna kiselost, čvrstoća ploda), likopen i antioksidacijsku aktivnost je izostao. Temeljem dobivenih rezultata možemo zaključiti da je industrijska rajčica podložna nativnim AMF, dok je ciljana inokulacija presadnica AMF značajno povećala ukupni sadržaj fenola i P. Dobiveni rezultati ukazuju na potencijalnu primjenu AMF u komercijalnoj proizvodnji industrijske rajčice, međutim prethodna prilagodba uzgojnih uvjeta je neophodna za postizanje značajnijih rezultata.

U ovom je radu ispitan utjecaj filtracije svježih sortnih djevičanskih maslinovih ulja Buže i Istarske bjelice u industrijskom mjerilu na sastav hlapljivih tvari, ukupnih fenola te senzorska svojstva, a uzorci ulja izbistreni filtracijom uspoređeni su s onima koji su izbistreni prirodnom sedimentacijom/dekantacijom nakon šest mjeseci skladištenja. Filtracija je različito utjecala na sastav hlapljivih tvari uzoraka ulja dobivenih od različitih sorata. U ulju sorte Buža je nakon filtracije lagano porastao samo udjel (Z)-2-pentenola, dok se u ulju Istarske bjelice promijenio udjel osam spojeva nakon filtracije (udjeli heksanala, (E)-2-pentenala, (Z)-3-heksenala, (Z)-2-pentenola i (Z)-3-heksen-1-ola su porasli, dok su se udjeli heksil acetata, (E)-2-penten-1-ola i (E)-2-heksen-1-ola smanjili). U svježe filtriranom ulju sorte Buža opaženo je blago smanjenje udjela ukupnih fenola, dok je u ulju sorte Istarska bjelica to smanjenje bilo izraženo, što je uzrokovalo smanjenje intenziteta pikantnosti i gorčine ulja. Sedimentacija/dekantiranje imali su prednost naspram filtracije kod obje sorte, jer su očuvali senzorski profil i udjel ukupnih fenola. Profili arome procijenjeni na osnovi vrijednosti aktivnosti mirisa hlapljivih spojeva i njihovog grupiranja u serije uspoređeni su sa stvarnim senzorskim profilima maslinovih ulja. Dobiveni rezultati mogu imati veliku primjenu u industriji maslinovih ulja tijekom optimiranja tehnologije proizvodnje sortnih djevičanskih maslinovih ulja s očuvanim specifičnim i tipičnim senzorskim svojstvima, ali mogu poslužiti i stručnjacima za izbor metode bistrenja djevičanskih maslinovih ulja prije analize hlapljivih tvari., This study investigates the effect of industrial scale filtration of fresh monovarietal virgin olive oil from Buža and Istarska bjelica cultivars on their volatiles, total phenols and sensory characteristics, and compares the oil samples clarified by filtration with those clarified by natural sedimentation/decantation after six months of storage. Filtration had a different effect on volatiles from the oil samples obtained from different cultivars. In the oil from Buža cultivar immediately after filtration only the amount of (Z)-2-pentenol slightly increased, but in Istarska bjelica the oil filtration affected eight compounds (the amount of hexanal, (E)-2-pentenal, (Z)-3-hexenal, (Z)-2-pentenol and (Z)-3-hexen-1-ol increased, while of hexyl acetate, (E)-2-penten-1-ol and (E)-2-hexen-1-ol decreased). In fresh filtered oil from Buža cultivar a slight decrease of total phenols was observed, while in those from Istarska bjelica the decrease was sharp, causing a decrease in the pungency and bitterness. Sedimentation/decantation had advantages over oil filtration of both cultivars, due to improved effect on the preservation of the sensory profile and the level of total phenols. Tentative aroma profiles based on odorant series obtained from the odour activity values were compared to the actual olive oil sensory profiles. These results could have a high level of applications in the olive oil industry for the optimization of the technology for obtaining monovarietal virgin olive oil with preserved specific and typical sensory characteristics, but also may serve experts to choose an appropriate virgin olive oil clarification method prior to analysis of volatile compounds.

The aim of this study was to characterize monovarietal olive oils obtained from two less known autochthonous cultivars (Bova and Buža puntoža) on the basis of sterols, triterpene dialcohols and fatty acids profile for the first time, and three monovarietal olive oils obtained from the most widespread autochthonous cultivars (Buža, Istarska bjelica and Rosinjola) grown in Istria, Croatia. β-sitosterol, Δ-5-avenasterol and campesterol were the most abundant sterols in all samples. Campesterol, β-sitosterol and Δ-5-avenasterol most significantly differentiated investigated oils. Bova oil had the highest amount of total sterols (2964 ± 458 mg/kg). Istarska bjelica oil had a peculiar sterol composition with exceptionally low β-sitosterol (67%), high Δ-5-avenasterol (27%) and the highest triterpene dialcohols percentages. Rosinjola and Istarska bjelica oils had the highest monounsaturated fatty acids level, Buža oil had the highest polyunsaturated fatty acids level, while Bova oil showed the highest level of saturated fatty acids. Tested oils obtained from the most abundant cultivars fulfilled all the demands of the current EU regulation required for virgin olive oil regarding sterols, triterpene dialcohols and fatty acids, but Bova and Buža puntoža oil slightly exceeded the upper limit for linolenic acid. Since cultivar is the source of natural variation of sterols, triterpene dialcohols and fatty acids in virgin olive oils, the knowledge about the content of these particular compounds in different monovarietal oils from autochthonous cultivars is important to determine possible disagreements with the demands of the current legislation required for virgin olive oils, in order to anticipate possible false results indicating adulteration.