The effects of aluminum on the accumulation of sugars, amino acids and organic acids in two hybrid cultivars of sorghum were studied. The concentration of these organic compounds increased in the roots of the Al‐treated plants, mainly in the tolerant cultivar. The composition of the organic acid fraction showed a significantly higher accumulation of trans‐aconitate and malate in the tolerant cultivar as compared with the sensitive one. The higher levels of these acids in the Al‐treated plants could be interpreted as being indicative of a chelating detoxifying mechanism of aluminum in these plants.
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Cambraia et al. (1983) studied this question.
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