Table 1.

Effect of Various Growth Regulators on GUS Expression in the Root Elongation Zone of the WT/BA3 Line

TreatmentGUS Activitya
Control
20 μM IAA+++
20 μMIBA+
20 μM NAA+++
20 μM2,4-D+++
20 μM 2,3-D
20 μM PCIB
20 μM TIBA
20 μMFC
20 μM indole
20 μMtryptophan
20 μM GA
20 μM ABA
20 μM BA
20 μM SA
20 μM ACC
20 μL/L C2H4
Air
  • a Batches of five to 10 seedlings were analyzed in at least two independent experiments. GUS activity in the root elongation zone of 5-day-old light-grown seedlings was assessed visually as strong (+ + +), weak (+), or undetectable (−).