Table I.

Frequency of root hair bursting in response to EGTA and La3+

Root hairs were treated as indicated, and percentages of burst hairs in the apical 400-μm region of the root hair zone were scored after 10 min. Data are from at least six different roots for each treatment.

TreatmentNo. of Root Hairs AnalyzedPercentage of Burst Root Hairs
4 mm EGTA11998.5
1 mm La3+8796.0
0.2 mm La3+, apical 200 μma5486.2
0.2 mm La3+, apical 400 μma11765.4
  • a Root hairs were monitored in either the apical 200- or 400-μm region of the root hair zone.