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The effect of Al on ATPase specific activity in total microsomal membranes prepared from 1-cm root tips of cv PT741, cv Atlas-66, and cv Maringa (Al resistant), and from cv Scout-66 and cv Katepwa (Al sensitive). Five-day-old seedlings of each cultivar were exposed to 0, 20, or 100 μm Al for 48 h. Values represent means ± se of three independent replicates.
