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Effects of 26 days exposure to different light regimens on the levels of a representative amino acid (proline, A), plant hormones or compounds with regulatory effects (jasmonic acid, C; abscisic acid, D; sorgolactone, E), and phenolic compounds (p-coumaric acid, B; isovitexin, F) in leaves of spring barley varieties Barke (dark grey) and Bojos (light grey). Additional details are in the Figure 1 legend.
