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Short-term effects of Al and the influence of DDG (callose synthesis inhibitor) on wheat cv Scout 66 root elongation. Short-term effects of Al (20 μm, up to 8 h) treatment (A) and DDG (100 μm, 3 h) pretreatment followed by Al (6-h) treatment (B). Treatment with DDG (100 μm) alone showed no inhibition during the 9-h growth period (data not shown). Values are means of 10 independent plants ± se and are representative of at least three independent experiments.
