ISHS Acta Horticulturae 567: IV International Strawberry Symposium
BENZOTHIADIAZOLE AND GLYCINE BETAINE TREATMENTS ENHANCE PHENOLIC COMPOUND PRODUCTION IN STRAWBERRY |
| Authors: | R. Karjalainen, A. Lehtinen, V. Hietaniemi, J.-M. Pihlava, K. Jokinen, M. Keinänen, R. Julkunen-Tiito |
| Keywords: | BTH, Glycine betaine, phenolics, flavonoids, strawberry |
| Abstract:
Strawberry contains a variety of phenolic compounds implicated in protective function against plant diseases and health-promoting activities in human nutrition. Two compounds, benzothiadiazole (BTH), a synthetic plant activator, and glycine betaine, an amino acid derivate from sugar beet, were tested for their ability to stimulate phenolic production in strawberry. Foliar-applied glycine betaine and benzothiadiazole (BTH) at the young-seedling stage (3-4 leaf stage) enhanced the levels of several phenolic compounds in strawberry leaves. Notable increases were detected in the levels of ellagi- tannin, ellagic acid and gallic acid derivates, quercetin and kaempferol konjugates. The levels of catechin (+/-) and chlorogenic acid did vary with either treatment. The levels of two flavonols, quercetin and kaempferol in berries also increased in response to foliar treatment of BTH. The results suggest that exogenously applied BTH and glycine betaine may be used to increase the levels of protective and health-promoting compounds in strawberries. | |
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