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Uv Radiation Increases Flavonoid Protection But Decreases Reproduction In Silene Littorea, José Carlos Del Valle, Mª Luisa Buide, Justen B. Whittall, Fernando Valladares, Eduardo Narbona
Uv Radiation Increases Flavonoid Protection But Decreases Reproduction In Silene Littorea, José Carlos Del Valle, Mª Luisa Buide, Justen B. Whittall, Fernando Valladares, Eduardo Narbona
Biology
Plants respond to changes in ultraviolet (UV) radiation both morphologically and physiologically. Among the variety of plant UV-responses, the synthesis of UV-absorbing flavonoids constitutes an effective non-enzymatic mechanism to mitigate photoinhibitory and photooxidative damage caused by UV stress, either reducing the penetration of incident UV radiation or acting as quenchers of reactive oxygen species (ROS). In this study, we designed a UV-exclusion experiment to investigate the effects of UV radiation in Silene littorea. We spectrophotometrically quantified concentrations of both anthocyanins and UV-absorbing phenolic compounds in petals, calyces, leaves and stems. Furthermore, we analyzed the UV effect on the photosynthetic …