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నైరూప్య

Effects of Arbuscular Mycorrhizal Colonization on the Growth of Upland Rice (Oryzal Sativa L.) in Soil Experimentally Contaminated with Cu and Pb

Xu Hong Zhang, You Shan Wang and Ai Jun Lin

A pot culture experiment was carried out to investigate the roles of Glomus mosseae in plant Cu and Pb acquisition by Oryzal sativa L., and Cu-Pb interactions. Cu was applied to the soil with different Cu levels including 0 (Cu0), 100 (Cu100), 200 (Cu200) mg kg-1 and Pb addition including 0, 300, 600 mg kg-1. All the treatments were designed with (+M) or without (-M) Glomus mosseae as randomized block. The results indicated that Cu addition and Pb addition decreased root colonization significantly. AM (arbuscular mycorrhizal) inoculation increased the root biomass under all the Cu and Pb treatments and increased the shoot biomass under Cu200 with Pb600 treatments observably compared with -M treatments. +M treatments enhanced plant Cu acquisition by Oryzal sativa L. compared with -M treatments except for shoot Cu uptake of Cu200-Pb300 treatments. However, plant Cu concentrations were decreased markedly by the root colonization under all the Cu-Pb interactions except for shoot Cu concentrations of Cu200-Pb600 treatments compared with –M treatments. Irrespective of Cu and Pb addition levels, +M plant had higher Pb uptake than –M plants. On the contrary, the roots of +M plants had significantly lower Pb concentrations than those of –M plant.