Fig. 1. Effect of chlormequat chloride (CCC) and ethephon on stem elongation and relative elongation rate (RER) of main shoot and T1 and T2 tillers of oat at 14- and 18-h DL in Exp. 2; DAT is days after treatment. The RER (shown as 1000 x cm cm^-1 d^-1) is shown between each time of measurement in a cluster of three values: The upper one is for the control, the middle one for CCC, and the lower one for ethephon treatment. At each time of measurement, the same letters indicate no significant difference at P 0.05: The upper letter is for control, the middle one for CCC, and the lower one for ethephon treatment; ns is not significant.