Abstract
‘Goha’, ‘Gangha’, ‘Gwanha’, and ‘Yeolha’ are newly-developed Korean everbearing strawberry (Fragaria ananassa Duch.) cultivars. Bioactive phytochemicals play a crucial role in the prevention of cancer, cardiovascular, neurodegenerative, and metabolic diseases. We examined the free radical scavenging activity and α-glucosidase inhibitory activity in these four cultivars and a junebearing cultivar ‘Seolhyang’ for comparison. ‘Gwanha’ showed the strongest 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) free radical scavenging activities, and ‘Gwanha’ and ‘Goha’ had the most potent α-glucosidase inhibitory activity. Total anthocyanin content (TAC) was the highest in ‘Gwanha’. The major anthocyanin components of everbearing strawberry were determined to be pelargonidin-3-O-glucoside (Pg3G), pelargonidin-3-O-rutinoside, and cyanidin-3-O-glucoside (C3G). A correlation study between activity and components revealed that TAC was highly correlated with antioxidant and antihyperglycemic activities, and in principal component analysis, C3G is highly correlated with antioxidant activity and Pg3G is highly correlated with the antihyperglycemic effect of everbearing strawberries. Among the four everbearing strawberry cultivars, ‘Gwanha’ and ‘Goha’ are rich sources of pelargonidin showing strong α-glucosidase inhibitory activity and are promising dietary sources to prevent diabetes.
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Acknowledgements
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MEST) [Grant Number. NRF-2015R1D1A3A01020708] and Research Fund of Kyungpook National University.
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MJP performed the experiments, analyzed the data, and wrote the paper; DHR performed the experiments and analyzed the data; JYC and DGL performed the experiments; JNL contributed the four cultivars of everbearing strawberries; YHK contributed reagents, materials, and analysis tools, and guided the experiment and wrote the paper.
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Park, M.J., Ryu, D.H., Cho, J.Y. et al. Potential for antioxidant and antihyperglycemic activities of four everbearing strawberry cultivars. Hortic. Environ. Biotechnol. 61, 615–623 (2020). https://doi.org/10.1007/s13580-020-00240-y
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DOI: https://doi.org/10.1007/s13580-020-00240-y