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. Author manuscript; available in PMC: 2019 Mar 5.
Published in final edited form as: Photochem Photobiol Sci. 2017 Feb 15;16(2):107–145. doi: 10.1039/c7pp90001e

Fig. 5.

Fig. 5

The location of UV sunscreens in plant leaves and the diurnal changes in UV sunscreen protection. A. shows a cross-section of a leaf of a typical broad-leaved plant illustrating the arrangement of major cells and tissues and the location of UV sunscreens (flavonoid pigments) in epidermal tissue. B. shows diurnal changes in solar UV radiation reaching the ground under a typical clear sky and the response of a plant species that adjusts its UV protection over the day (okra) and one that does not (corn).