Effects of acidity and/or aluminum stress on seed germination and seedling growth of alfalfa

doi:10.11686/cyxb2014362

Abstract

Abstract: Alfalfa seeds (cv.Golden empress) were treated with acidic (pH 3.0, 4.5, 6.0, 7.5) and aluminum (0, 50, 100, 200 mg/L Al³⁺) solutions to study the effects of pH and Al³⁺ stresses on seed germination and seedling growth. The results showed that acidity significantly inhibited germination and seedling growth of alfalfa; lower pH had a greater effect than higher pH. Germination rate, germination potential, germination index, stem length and root length of untreated seeds (control) and seeds treated with 50 mg/L Al³⁺ were significantly higher (P<0.05) than all other treatments. Germination and seedling growth were seriously reduced by higher Al³⁺ treatments (100 mg/L or 200 mg/L) which resulted in a significant decrease in the growth index (P<0.05). The combination of acidity and aluminum stress on germination and seedling growth of alfalfa were greater than those of either stress in isolation. Even the treatment of pH<4.5 and Al³⁺>50 mg/L had a significant negative effect on seed germination and growth.

YANG Dan-Na, LUO Ye-Feng, XIE Jia-Qi, ZHANG Qin, YANG Lie. Effects of acidity and/or aluminum stress on seed germination and seedling growth of alfalfa[J]. Acta Prataculturae Sinica, 2015, 24(8): 103-109.

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