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Phytohormonal treatment effects. Expression analysis of the HR4 gene from Arabidopsis by the addition of phytohormones, 5 mM ethephon, 5 mM SA, and 100 μM MeJA. Control conditions or without phytohormones (white bars) and tester conditions with 5 mM of ethephon (light grey bars), 5 mM SA (dark grey bars), and 100 μM MeJA (black bars) at 1, 3, and 24 h post sprayed, respectively.
