Abstract
The efficiency of phytoremediation is mainly dependent on the capacity of plants in absorption, translocation, and accumulation of Cd. This study was designed to investigate whether Cd translocation and accumulation in tall fescue plants was regulated by foliar application of KH2PO4. The results showed that the foliar application of KH2PO4 significantly increased Cd concentration and total Cd accumulated in leaves and the capacity of Cd extraction, compared to the root application. The water-soluble organic acid complexes and the pectate- and protein-integrated Cd were the two major Cd chemical forms deposited in leaves. The foliar application increased Cd in the pectate- and protein-integrated forms and decreased the water-soluble forms in leaves. Cd phosphates were not the major chemical forms deposited in leaves in both foliar and root applications. The results indicated that the foliar application of KH2PO4 enhanced Cd accumulation in leaves of tall fescue, which might be associated with the leaf deposit of the pectate- and protein-integrated Cd forms.
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Acknowledgements
The authors are thankful for the financial support given by the National Natural Science Foundation of China (Grant No. 31472143). The authors are indebted to Prof. Dr. Bingru Huang at Rutgers University for the great help in refining the manuscript.
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Meng, D., Xu, P., Dong, Q. et al. Comparison of Foliar and Root Application of Potassium Dihydrogen Phosphate in Regulating Cadmium Translocation and Accumulation in Tall Fescue (Festuca arundinacea). Water Air Soil Pollut 228, 118 (2017). https://doi.org/10.1007/s11270-017-3304-x
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DOI: https://doi.org/10.1007/s11270-017-3304-x