Published in Scientific Papers. Series B, Horticulture, Vol. LXIV, Issue 1
Written by Cristina BĂBEANU, Rodica SOARE, Maria DINU, Ovidiu PĂNIȚĂ
The aim of the study was the comparative analysis of some varieties of leaf cabbage in terms of their content in total phenolic compounds, flavonoids, foliar pigments, antioxidant activity and antioxidant enzyme activity (superoxide dismutase, catalase and soluble peroxidase). The biological material was represented by two cultivars of kale: Dwarf Green Curled and Nero Di Toscana and by the cultivar Pak Choi White, a variety of Chinese cabbage, cropped under the same conditions. The total phenolics, flavonoids, chlorophyll and carotene content were determined by colorimetric methods. The antioxidant activity was determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay and enzymatic antioxidant activities were determined colorimetric using appropriate substrate. The results show that Nero Di Toscana cultivar has the highest content of phenolic compounds (275.1 mg GAE/100 g fm), total soluble peroxidase (50.33 ΔA/min/g f.m) and low Superoxide dismutase activity (30.06 IC 50% mg) and at chinese cabbage, Pak Choi White cultivar recorded a high catalase activity (44.96 mM H2O2/g fm/min) and the highest antioxidant activity (1294 TE/100 g fm). The study recommends the introduction into the diet of the varieties studied due to the high content of phytochemicals with health-promoting benefits.
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