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J Food Sci. 2017 Feb;82(2):341-349. doi: 10.1111/1750-3841.13600. Epub 2017 Jan 18.

A Comparative Study of Phenolic Antioxidant Activity and Flavonoid Biosynthesis-Related Gene Expression Between Summer and Winter Strawberry Cultivars.

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Dept. of Plant Science, Gangneung-Wonju Natl. Univ., 7 Jukheon-Gil, Gangneung, 25457, Republic of Korea.
Dept. of Molecular Bioscience, Dept. of Agriculture and Life Industry, Kangwon Natl. Univ., 1 Kangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341, Republic of Korea.
Dept. of Crop Science, Chungnam Natl. Univ., 99 Daehak-Ro, Yuseong-gu, Daejeon, 34134, Republic of Korea.


Strawberry (Fragaria ananassa Duch.) possesses good antioxidant properties. Phenolic compounds in strawberries, such as anthocyanins and ellagic acid, mainly act as antioxidants. This study aimed to compare the phenolic content and expression patterns of genes involved in flavonoid biosynthesis between summer and winter strawberry cultivars affected by seasonal variation, degree of ripeness, and genotype. Antioxidant activity and the total content of phenols and flavonoids decreased with fruit ripening. Most notably, summer strawberry cultivars showed higher antioxidant activity than winter cultivars. The expression patterns of flavonoid biosynthetic genes tested were cultivar-dependent and were also affected by ripening. These results help us understand the nutritional and physiological characteristics of selected cultivars and provide a range of information for strawberry consumption.


anthocyanin; antioxidant activity; ellagic acid; flavonoid biosynthesis; strawberry

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