Fig. 1.

Screening of eight tatary buckwheat cultivars for Al resistance. Three-day-old seedlings were subjected to a 0·5 mm CaCl₂ solution (pH 4·5) containing 0 or 25 µm AlCl₃ for 24 h. Root growth was measured by a ruler before and after treatment. Relative root elongation was the percentage of root elongation in Al-free solution to that in Al-containing solution. Absolute control growth rates [cm (24 h)⁻¹] are indicated above the columns. Error bars represent ± s.d. (n = 10). Means with different letters are statistically different at P < 0·05. Three replicate experiments were conducted and data from one set are presented.