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Effects of PCIB on GUS activity in the root elongation zone of the BA::GUS transgenic line. Five-day-old seedlings were treated with IAA, PCIB, and/or other compounds for 6 h and stained with 5-bromo-4-chloro-3-indolyl β-d-glucuronide (X-gluc). A, Dose response for IAA-induced BA::GUS expression in the presence of 20 μm each of NPA, TIBA, 2,4,6-T, PCIB, and 10 μm YkB. B, Effects of 20, 50, and 100 μm each of PCIB, 1-NOA, NPA, and TIBA on 1 μm NAA-induced BA::GUS expression.
