Lanthanum Induced Seed Germination Rate, Seedling Growth and Dry Matter Production of Soybean [Glycine max (L.) Merr.]

Author(s): Radhe Shyam* and N.C. Aery

Abstract: A solution culture experiment was conducted to study the effect of different levels (0.1, 0.5, 2.5, 12.5 and 62.5 μg ml-1) of La3+ provided as La.N3O9.6H2O on seed germination, seedling growth, dry matter production (shoot-root relative yield) and grade of growth inhibition of soybean [Glycine max (L.) Merr.]. La3+ at low levels (0.1-0.5 μg ml-1) significantly increased the rate of seed germination, seedling growth, dry matter production and decreased the grade of growth inhibition of soybean seedlings. Higher concentration (12.5 and 62.5 μg ml-1) of La3+ proved to be toxic for seedling growth and dry matter production. At higher levels of La3+ (62.5 μg ml-1) root length was drastically affected than shoot length. Though germination speed was affected, ultimate germination was always 100%. Results of the study indicate that low levels of La3+ are beneficial for the soybean plants.

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