ISSN:
1573-5036
Keywords:
acid soil
;
differential response
;
Glycine max (L.) Merr.
;
manganese toxicity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract To determine the tolerance of soybean genotypes to Mn toxicity, a green house study was conducted. Hayesville sandy loam (clayey, oxidic, mesic, Typic Hapludult), high in “manganese”, was used for the experiment. The experimental design was split-plot with three replications. Forty-one different soybean genotypes were planted in pots at two different pH levels: 5.2 (original soil pH) and 6.4 (amended with lime). Soybean genotypes were allowed to grow to the dry pod stage. Soil pH levels affected the soybean genotypes yields significantly (p 〈 0.01). Tolerant genotypes showed a higher or similar seed yield at pH 5.2 compared to pH 6.4. Sensitive genotype yields were lower at pH 5.2 than at pH 6.4. In general, Mn in leaves was higher at pH 5.2 than at pH 6.4. Some of the sensitive genotypes at pH 5.2. showed severe chlorosis and crinkle leaf symptoms as a result of Mn toxicity. Excess available Mn at pH 5.2. induced Ca deficiency. Soybean genotypes PI423758, PI417440, Aoda, Kingston, Rokusum and some others were tolerant to Mn toxicity, whereas PI417288, Verde, Wilson 5, Sango, Funk Delicious and some others were sensitive to Mn toxicity. The genotypes found to be tolerant can be recommended to plant breeders for development of Mn-tolerant cultivars.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00012039
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