Effects of single and combined applications of three root exudates of Sedum plumbizincicola on the phytoremediation efficiency of paddy soil contaminated with Cd

Root exudates are carriers for the transfer of material, energy and information between plant roots soils. Plants encountering environmental stresses such as heavy metal pollution adapt to environment by producing secreting root exudates. In this study, laboratory soil culture experiment pot with Sedum plumbizincicola were used study effects single combined application three exudates, citric acid, glycine, fructose, on Cd-activation phytoremediation Cd-contaminated paddy soil. Results from showed that all significantly activated Cd in presented increased content diethylenetriamine pentaacetic acid extracted (DTPA-Cd). Particular, (SC) at a relatively low concentration (2 mmol/kg) exhibited best activation efficiency increasing DTPA-Cd 66.12%. For combination glycine (SC + G, 1:3) had effect experiment, both concentrate (1 (1:1) reduced total biomass S. ; thus, 42.33% 35.61%. The results suggest plays crucial role or applications glycine. However, mechanisms under synergetic interaction require further investigation.