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(College of Agricultural Resources and Environment Science,China Agricultural University,Beijing 100094)  
Uptake of Zn and Cd by hyphae of an arbuscular mycorrhizal fungi associated with red clover was stuided using three compartment pot experiment separated with 30μm nylon nets.The central compartment for root growth and two outer ones for growth of arbuscular mycorrhizal hyphae.Zn and Cd were applied at three levels (0,50 and 200mg/kg) respectivley in the two outer compartments.Arbuscular mycorrizal fungus (G.mosseae) was inoculated or uninoculated to test the direct hyphae contribution to Zn and Cd uptake by the plants.The results showed that there was no significant difference in shoot dry weight among all treatments.Increased Zn and Cd were observed due to the inoculation of mycorrhizal fungi with Zn and Cd applied.With a dosage of 50mg/kg in the outer compartment,the contribution of mycorrhizal hyphae to plant uptake accunted for up to 22.4% of the total Zn uptake and 53.6% of the total Cd uptake.With 200mg/kg applied,the contribution of mycorrhizal fungi to plant total Zn and Cd uptake accounted for up to 8.1% and 63.5%,respectively.
【Fund】: 国家自然科学基金
【CateGory Index】: S793
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