期刊名称：African Journal of Environmental Science and Technology
电子版ISSN：1996-0786
出版年度：2009
卷号：3
期号：6
页码：157-163
DOI：10.5897/AJEST08.059
语种：English
出版社：Academic Journals
摘要：A greenhouse experiment was conducted to assess the arbuscular mycorrhiza contribution to the growth performance and heavy metals (Cd and Pb) uptake ofHelianthus annuusL. from polluted soils. Cadmium sulfate (CdSO4.8H2O) and lead acetate ((CH3COO)2Pb.3H2O) were applied at the concentrations: Cd- 0,20,40,60,80 mg kg-1and Pb-0,250,500,750,1000 mg kg-1in 90 plastic pots filled with 5 kg of topsoil each. Propagules ofGlomus mosseae(GM) andGlomus intraradices(GI) at 25 g per pot were applied. Non-inoculated pots served as controls. Each treatment was replicated thrice in completely randomized design. Data were analysed using ANOVA and descriptive statistics. Results showed that arbuscular mycorrhiza (AM) fungi significantly (p ≤ 0.05) influenced the number of leaves, plant height and stem girth of sunflower plants only at 80 mg Cd kg-1concentration. Highest values of 0.11 mg Cd kg-1and 0.29 mg Pb kg-1were obtained with GI in the dry shoot ofHelianthus annuuswhile 0.05 mg Cd kg-1and 0.23 mg Pb kg-1were remediated with GM application. Least values of Cd and Pb were removed when no AM was applied. GM and GI fungi enhanced the growth ofHelianthus annuusand the uptake of Cd and Pb; but GI performed better. Also, a significant (p < 0.05) reduction of AM fungi colonization percentage was obtained with increase in Cd and Pb concentrations.
