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The first detailed phytochemical screening was performed on juices prepared from arils of wild pomegranate fruits taken from several locations in Montenegro with the aim of their future valorization. Particular attention is paid to the effect of pomegranate growth conditions on the juice quality. In addition to the basic parameters of pomegranate fruits and juices, nine primary metabolites (sugars, organic acids and vitamin C) were determined in the juices. Among 97 phenolic compounds, 23 anthocyanins and their derivatives, 33 ellagitannins and derivatives of ellagic acid, 12 flavanols, 4 flavonol glycosides, 1 flavone, 17 hydroxybenzoic acids and 7 hydroxycinnamic acids and their derivatives, were identified. Flavanols (1137-4424 mg/L) as well as ellagitannins and ellagic acid derivatives (1849-2991 mg/L) had the highest concentrations in pomegranate juices. Juices from the pomegranates grown on two soil types had total analyzed phenolics ranging from 4387 mg/L (Eutric Cambisol) up to 8461 mg/L (Terra Rossa)., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Ltd. All rights reserved.)

The foliar fertilization has been used as an important agrotechnical measure to avoid deficiencies and to improve quality. During the two consecutive years, a study has been performed on Vitis vinifera L. (cv. 'Cardinal') to examine whether a grape berry quality has been affected by the foliar application of PK fertilizer. A liquid mineral fertilizer containing 15% P2O5, 20% K2O with 0.1% B, 0.1% Mn and 0.01% Mo (% w/w) has been sprayed three times at rate of 8 L ha(-1) every 14-15 days starting at about 15 days before veraison. The sugars, organic acids and flavonoids (anthocyanins, flavonols and flavan-3-ols) have been analyzed by the high performance liquid chromatography in the grape berries. The foliar fertilization of grapevine can accelerate the accumulation of sugars and anthocyanins, whereas climatic factors and yearly fluctuations influence the content of sugars, organic acids, and phenolic compounds in general. The effect of fertilizer spraying on flavonols and flavan-3-ols has not been found.