Strawberry fruit quality with the increased iron application
Short-day strawberry is a seasonal fruit, rich in nutrients and bioactive substances, which is why it is often called a super fruit. In terms of agro-technical complexity, it is a very demanding, intensive crop and is one of the most sensitive fruit species in which fertilization has great significance. One of the most important trace elements in strawberry fertilization is iron (Fe). Strawberry is sensitive to its deficiency whereby sensitivity varies between cultivars. Fe is an essential micronutrient and as a component of many vital plant enzymes, it plays a critical role in metabolic processes such as DNA synthesis, respiration, and photosynthesis. Near Zagreb (Croatia) in the year 2019 three different treatments, 1) Fe/Zn-alginate microspheres; 2) Fe/Zn-alginate/chitosan microcapsules; and 3) foliar iron - Fe-EDDHA solution were applied to short-day strawberry cultivar 'Joly'. Fruits were measured in terms of physicochemical properties (color and firmness, total soluble solids, and total acidity), phytochemicals content (polyphenols, flavonoids, and anthocyanins), and antioxidant capacity. The total yield was not significantly affected by an application of any treatment. All treatments affected the total acidity, firmness, and color of the fruit. Foliar treatment with Fe-EDDHA significantly increased firmness and decreased acidity of fruits, respective to the untreated plants (control). All treatments significantly improved the sweetness of fruits when compared with untreated plants. Treatment with Fe/Zn-alginate microspheres had a significantly positive effect on the number of biologically active compounds (i.e., total polyphenols, flavonoids, and anthocyanins) as well as on the total antioxidant capacity of strawberry fruits.
Duralija, B., Mikec, D., Jurić, S., Lazarević, B., Maslov Bandić, L., Vlahoviček-Kahlina, K. and Vinceković, M. (2021). Strawberry fruit quality with the increased iron application. Acta Hortic. 1309, 1033-1040
Fragaria × ananassa Duch., strawberry fruit, physical properties, microparticles, antioxidant capacity