Root exudates from Fe deficient barley increase metal accumulation by pea: implication to naturally enhanced phytoextraction
Soluble root exudates collected from barley grown in the Fe deficient-nutrition solutions were added to the artificially contaminated soils to study their effects on metal solubility. Results showed that the addition of barley root exudates resulted in 4.7, 3.2, 9.7, 4.9 and 11.5 folds increase in the concentrations of Cu, Pb, Zn, Cd and Fe, respectively in comparison with the soils added with the root exudates from barley in the full-nutrition solutions. When pea was mixing-cultured with barley in pots, the concentrations of Cu, Pb, Zn, Cd and Fe in the shoots of pea were 1.5, 1.8, 1.4, 1.4 and 1.3 times higher than that grown in sole ( single culture pot). It was hypothesized that the root exudates from barley in the mixed culture system played an important role in the process of solubilising metals in soil and facilitating metal uptake by pea. Although the improved efficiency from the current experiment was relatively low, it might indicate a potential future direction on a naturally enhanced remediation of metal contaminated soils.
Mixing-culture Pea Barley Root exudates pH Microbial activity
Chunling Luo Zhenguo Shen Xiangdong Li
Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowl Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowl Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowl
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
702-703
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）