Six sorghum [Sorghum bicolor (L.) Moench] genotypes with varying tolerance to Al were grown in greenhouse experiments with acid Cecil sandy clay loam (clayey, Kaolinitic, thermic, Typic Hapludults) at pH 4.4 with and without vesicular‐arbuscular mycorrhizal (VAM) fungus [Glomus deserticola (Trappe, Bloss, and Menge)]. The effects of VAM colonization on mineral element uptake and sorghum genotype tolerance to Al were investigated. Sorghum genotypes maintained their tolerance or susceptibility to acid soil conditions even when plants were colonized with VAM. Mycorrhizal and nonmycorrhizal plants had similar shoot N, P, S, K, Ca, Mg, Al, Mn, Fe, Zn, and Cu contents, except for one genotype (SC283). SC283 had lower mineral element contents in mycorrhizal compared to nonmycorrhizal plants. Soil Al availability may have reduced VAM colonization of sorghum roots and VAM activity in the soil.
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Raju et al. (1988) studied this question.
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