Effect of lanthanum on root growth of Paspalum notatum seedlings under aluminum stress

doi:10.11686/cyxb2016475

Abstract

Abstract: Lanthanum (La) is one of the most vital and active rare earth elements. It can promote seed germination, increase crop output, and enhance plant resistance to environmental stresses. Paspalum notatum, a warm season turfgrass commonly used for conserving soil and water in Guangzhou, was selected to study the effect of La on root growth. Seven-day-old seedlings of P. notatum were grown in hydroponic conditions in an acid solution containing 0.9 μmol/L Al³⁺ with and without 0.3 μmol/L La³⁺. Root morphology, the root dry weight/fresh weight ratio, and root activity were evaluated after 2, 4, and 6 d of treatment. The addition of La³⁺ to the acidic Al³⁺ solution resulted in increased axial root length, root surface area, number of root tips, root volume, and root activity of P. notatum seedlings. These findings indicated that La can promote the root growth of P. notatum seedlings under Al³⁺ stress.

LUO Han-Fu, SONG Hua-Wei, LIU Tian-Zeng, ZHANG Ju-Ming. Effect of lanthanum on root growth of Paspalum notatum seedlings under aluminum stress[J]. Acta Prataculturae Sinica, 2017, 26(9): 208-213.

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