Please use this identifier to cite or link to this item:
Title: Root exudates increase metal accumulation in mixed cultures : implications for naturally enhanced phytoextraction
Authors: Luo, Chunling
Shen, Zhenguo
Li, Xiangdong
Subjects: Mixed culture
Root exudates
Microbial activity
Issue Date: Sep-2008
Publisher: Springer
Source: Water, air, & soil pollution, Sept. 2008, v. 193, no. 1-4, p. 147-154.
Abstract: Soluble root exudates collected from the barley grown in Fe deficient-nutrition solutions were added to soil to study their effects on metal solubility. The results showed that the addition of barley root exudates from the Fe deficient-nutrition solutions resulted in a 4.7-, 3.2-, 9.7-, 4.9- and 11.5-fold increase in the concentrations of soluble Cu, Pb, Zn, Cd and Fe, respectively, in comparison with the root exudates from the full-nutrition solutions. When peas were placed in a mixed culture with barley in pots, the concentrations of Cu, Pb, Zn, Cd and Fe in the shoots of the peas were 1.5-, 1.8-, 1.4-, 1.4- and 1.3 times higher than those grown in sole (single culture pots). It was hypothesized that the root exudates from barley in the mixed culture system played an important role in the process of solubilizing metals in soil and facilitating the uptake of metals by peas. Although the improved efficiency from the current experiments was relatively low, it may indicate a potential approach to the remediation of metal-contaminated soils in a naturally enhanced way.
Rights: © Springer Science+Business Media B.V. 2008. The original publication is available at
Type: Journal/Magazine Article
DOI: 10.1007/s11270-008-9678-z
ISSN: 0049-6979 (print)
1573-2932 (online)
Appears in Collections:CEE Journal/Magazine Articles

Files in This Item:
File Description SizeFormat 
B76 Water Air Soil Pollution 2008.pdfPre-published version200.6 kBAdobe PDFView/Open

All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated. No item in the PolyU IR may be reproduced for commercial or resale purposes.