Figure 2.

A and B, Dose effects of AVG and ACC root treatments on root hair length (A) and number (B) of oilseed rape seedlings under homogeneous feeding of N (1 mm). C, Morphological changes in root hairs induced by 1 to 10 μm ACC or AVG doses of treatments. Data points represent the mean of the 12 longest and oldest root hairs from six different seedlings (n = 6 × 12 = 72) in the uppermost 3-mm section of 24-h-old neo-elongated primary roots (see white circle in Fig. 1A). Data were analyzed by the nonparametric test of Kruskall Wallis. Then, Mood median tests were used to compare means or medians; bars sharing different letters are significantly different at P = 0.05 (Sokal and Rohlf, 2003).