Ten wheat cultivars were studied to aluminum toxicity using five different levels of this element. The tolerance was measured taking into account the root growth in a aluminum-free complete nutrient solution after a previous Al treatment. With toxic amounts of Al, the primary roots did not grow at all and remained thickned at the tip as a typical Al injury. The wheat cultivars Siete Cerros and Tobari-66 were sensitive to 1 and 3 ppm of aluminum, respectively. The cultivars Alondra-S-46, Alondra-S-45 and IAC-17 were sensitive to 6 ppm. The cultivars BH-1146, IAC-5, IAC-18, IAC-13 and Londrina showed tolerance to 10 ppm but BH-1146, IAC-18 and IAC-13 were more tolerant than IAC-5 and Londrina. The cultivars BH-1146, IAC-17, Alondra-S-46, Tobari-66 and Siete Cerros were planted in pots containing acid soil presenting toxic aluminum. Half of the pots had the soil limed and the other half no lime was applied. The results of this experiment showed that the cultivar BH-1146 significantly outyielded the cultivars Tobari-66. Alondra-S-46, IAC-17 and Siete Cerros. These results confirmed those obtained at nutrient solution.