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 (−).