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Due to extreme climate changes, plants are exposed to severe soil water content, i.e. flooding and drought. The aim of this study was to assess the effect of different soil water content on the nutritional potential of young Chinese cabbage (Brassica rapa ssp. pekinensis) on the level of phenolics, sugars, photosynthetic pigments and antioxidant capacity. Total phenolic acids were induced in plants grown under drought conditions. Both types of stress increased soluble sugars in Chinese cabbage but reduced total tannins. Plants grown under drought had more L-ascorbic acid than the control group; however, the concentration of ferulic acid and quercetin was reduced. On the other hand, excess of water increased the amount of sinapic and ferulic acid, main hydroxycinnamic acids in Chinese cabbage. Photosynthetic pigments were more susceptible to flooding (reduced amount) than drought, the only exception was chlorophyll b whose concentration was significantly higher in plants grown under drought. In addition, among all the measured parameters, chlorophyll b reacted most specifically against flooding (decreased) and drought (increased). Chinese cabbage grown under flooding had reduced amount of porphyrins compared to the one grown under normal and drought conditions, but showed higher antioxidant capacity (ABTS). Based on the results, the use of excess water could be considered as a possibility when growing young Chinese cabbage since it increased the concentration of antioxidants sinapic and ferulic acid and resulted in higher antioxidant capacity, recorded by ABTS assay, compared to control plants. [ABSTRACT FROM AUTHOR]

• First assessment on nutritional significance of interspecies phytochemical transfer. • Black bryony improved L -ascorbic acid, kaempferol and total phenolics in cabbage. • Black bryony improved antioxidant and hypoglycemic activity of cabbage. • St. John's-wort, rose and chamomille increased cabbage antiproliferative activity. • Transfer of L -ascorbic acid and phenolics is affected by donor matrix. The high demand for healthy food in recent years has led to an increasing need for highly bioactive plant materials. One such plant, Chinese cabbage, possesses flavonoids with antioxidant and antidiabetic properties, but they appear in low quantities. The interspecific transfer of metabolites is a promising technique that could contribute to the increase of the beneficial properties of food. The objective of the study was to determine how an interspecific source-sink phytochemical transfer from donor extracts to the Chinese cabbage affects its phenolic and vitamin C profile and intestinal bioaccessibility, hypoglycemic potential and antioxidant capacity. In addition, sprouts treated with Rosa sp. and Hypericum perforatum extracts showed better antiproliferative effect towards human breast adenocarcinoma cells than untreated sprouts. The results suggest that treatment of plants with donor extracts is a promising approach to improve the nutritional and phytochemical profile and bioactive properties of acceptor plants. [ABSTRACT FROM AUTHOR]