Three-Year Comparative Study of Polyphenol Contents and Antioxidant Capacities in Fruits of Tomato (Lycopersicon esculentum Mill.) Cultivars Grown under Organic and Conventional Conditions

Abstract

In the present study, four tomato cultivars were grown under organic and conventional conditions in separate unheated greenhouses in three consecutive years. The objective was to assess the influence of the cultivation system on the content of individual polyphenols, total phenolics, and antioxidant capacity of tomatoes. The fruits were analyzed for total phenolic content by the Folin-Ciocalteau method and antioxidant capacity by the DPPH free radical scavenging assay. Individual phenolic compounds were analyzed using HPLC-DAD-MS/MS. Among 30 identified and quantified polyphenols, significantly higher contents of apigenin acetylhexoside, caffeic acid hexoside I, and phloretin dihexoside were found in all organic samples. The content of polyphenols was more dependent on year and cultivar than on cultivation conditions. Generally, the cultivation system had minor impact on polyphenols content, and only a few compounds were influenced by the mode of cultivation in all tested cultivars during all three years.

Untargeted screening of the bound / free phenolic composition in tomato cultivars for industrial transformation

“…Chlorogenic acid is the main polyphenol in the hydroxycinnamic acid family; in this regard, its concentration in our samples was found between 0.5 and 2.1 mg 100 g −1 FW. Our results on free / bound phenolic profiling (Table S1) were therefore definitely consistent with those that are reported in literature . Moreover, the results of this study matched those from Phenol‐Explorer (http://www.phenol-explorer.eu), which is the most comprehensive database on polyphenols in food.…”

“…In this regard, several phenolic compounds play an important role in tomato fruit quality, among which the most important are phenolic acids, phenylpropanoids, coumarins, and flavonoids. Overall, the major tomato polyphenols are hydroxycinnamic acids, flavanones, flavonols, and anthocyanins . The wide phenolic profile outlined by UHPLC‐QTOF suggests that our results are in accordance with the literature .…”

Changes in Polyphenols Contents and Antioxidant Capacities of Organically and Conventionally Cultivated Tomato (Solanum lycopersicum L.) Fruits during Ripening

“…Cultivar Erk has the heaviest and the largest fruits (average weight 150 g) and cv Gartenfreude the lightest and the smallest ones (25 g). The organic and conventional cultivation conditions are in detail described in our previous paper [17]. Tomato fruits from both cultivation conditions, forming a sample of 0.5–1.0 kg (three replications), were collected on the same day in three ripening stages.…”

“…For calculations, rutin as a calibration standard was used and the results were expressed in rutin equivalents. Determination of total phenolic contents by Folin-Ciocalteu method was performed according to the procedure described in our previous paper [17]. …”

Vermicompost and farmyard manure improves food quality, antioxidant and antibacterial potential ofCajanus cajan(L. Mill sp.) leaves

“…Contrarily, the importance of the influence of inorganic and organic + inorganic systems on the nutritional attributes was doubtful. The present result is in good agreement with the findings of Anton et al …”