Abstract
The present study was designed to identify the effects of ozone fumigation of red-veined sorrel plants on the selected physiological parameters and contents of bioactive compounds in the plant leaves. Sorrel plants grown in a pot experiment were subjected, at the final stage of growth, to ozone fumigation at a concentration of 1 ppm (mg m−3) for one, three, five, seven, and 10 min. The ozone treatment was followed with measurements performed one, four, and eight days later. The relative chlorophyll content in the leaves and selected chlorophyll fluorescence parameters (maximum quantum yield of PSII photochemistry, the maximum quantum yield of primary photochemistry and the performance index) and gas exchange parameters were assessed (net photosynthetic rate, transpiration rate, stomatal conductance, and intercellular CO2 concentration). By using the same leaves, the plant material was also assessed for the contents of bioactive compounds (total polyphenols) and for antioxidant properties (ABTS and DPPH assays). The ozone treatment did not produce adverse changes in the physiological parameters of the sorrel plants. Furthermore, no visible damage to the leaves was observed. On the other hand, the ozone fumigation induced the phenomenon of elicitation as a result of which it was observed that the ozone-treated sorrel plants had higher total polyphenol contents and greater antioxidant potential, compared to the plants of the same species grown in a traditional way without the ozone fumigation. Application of ozone fumigation in the production of Rumex sanguineus is associated with increased bioactive potential of the raw material obtained.
Highlights
Sorrel (Rumex) is a genus of plants in the knotweed family (Polygonaceae)
Piechowiak and Balawejder [43] investigated the effects of ozone on the levels of oxidative ozonation processantioxidants applied as ainfinal treatment during the production red-veined sorrel stressAn and small-molecule raspberries stored at room temperature.ofThe authors found
Rumex sanguineus did not lead to a decrease in the physiological parameters of the plants or to visible that ozone treatment where the gas was applied to the fruit at a concentration of 10 ppm for 30 min damage ofdefense the leaves
Summary
Rumex is one of the more popular herbs grown in spring, summer, and autumn [2]. It is a good source of bioactive compounds and an important food ingredient in various cuisines in Africa, Europe, and Asia. Sorrel root, due to its high content of phenolic compounds, is used for various therapeutic purposes as a detoxicant and as a healing agent in liver diseases, skin diseases, and even in malignant or benign tumors [4]. Sorrel is applied in various conditions such as anemia, vitamin deficiency, gastritis, liver diseases, or skin conditions, and for various purposes
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