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Abstract
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.
Notes
Published as Paper No. 8390, Journal Series, Nebraska Agricultural Research Division, Lincoln, from Projects 12–142 and 12–166. Supported in part by a grant from the International Sorghum/Millet Collaborative Research Support Program (INTSORMIL CRSP) through U.S. Agency for International Development (USAID) grant AID/DAN‐1254‐G‐55–5065–00.
Present address is Sorghum Physiology, International Crops Research Institute for the Semi‐Arid Tropics (ICRISAT), Patancheru P.O., Andhra Pradesh 502 324, India.