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Effect of Al-dose and time on root growth of M. truncatula. Cumulative root growth of seedlings exposed to 0, 1.25, 2.5, 5 and 10 μM Al for 12, 24, 48 and 72 h. Data represent the mean root growth values ± SE of eight seedlings from three independent experiments. (a) T32 seedlings. (b) S70 seedlings.
