Table I.

The Effects of the PLC inhibitor U73122 are reversible and do not affect extension growth of the internodes

Treatment	Internodal Extension	Inhibition of Bending
	mm	%
Control	4.37	0
Inactive analog U73343	4.9	0
PLC inhibitor U73122	5.0	65
PLC inhibitor U73122+ wash out	5.4	13

Internodal extension was measured 26 h after application of 0.5% (w/w) DMSO, 100 μm U73343 in DMSO, or 100 μm U73122 in DMSO. Data are the average of the extension measured in six segments per treatment; the error is approximately 20%.