Table I.

Effect of NPA on the gravity response, waving, and growth in root tips and intact plants

ResponseNPA Concentration Causing 50% Inhibition1-a
Intact plantsExcised root tips
Gravity response0.5 μm ± 0.080.6 μm ± 0.08
Waving0.4 μm ± 0.110.6 μm ± 0.24
Growth4.8 μm ± 0.151.9 μm ± 0.14
  • F1-a Reported values are the average and seof four separate experiments using NPA concentrations between 10 nm and 5 μm.