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Differential responses of sericea lespedeza to aluminum stress

Differential responses of sericea lespedeza to aluminum stress

Journal of Plant Nutrition 14(10): 1057-1066

Toxic levels of aluminum can cause severe yield reductions in many crop species, but sericea lespedeza [Lespedeza cuneata (Dum.-Cours.) G. Don] has demonstrated considerable tolerance. Aluminum tolerance of six sericea lespedeza cultivars (Am 312, Appalow, AU Lotan, Interstate, Interstate 76, Serala) representing a broad genetic base were evaluated in a Monmouth soil [26.2% Al saturation (pH 4.8) vs. 2.8% Al saturation (pH 5.7)] and in nutrient solutions (0 vs 111 .mu.M Al; pH 4.5). The soil and nutrient culture studies were harvested 30 and 27 d after seedling, respectively. Aluminum stress did not reduce root and shoot growth significantly, nor were the pooled Al stress x cultivar interactions significant. Cultivars differed significantly in mean shoot and root vigor in nutrient solutions but not in soil. Responses in soil were only weakly correlated with responses in nutrient solutions. Am 312 and Appalow had the lowest relative weight values (dry weight stressed/dry weight unstressed) in both media and Interstate and Interstate 76 the highest. Interstate 76 exhibited a significant positive response (5% level) to Al when evaluated in nutrient solutions.

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Accession: 002072810

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DOI: 10.1080/01904169109364265

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