The effects of different phosphate-amendments on lead (Pb) uptake, the activities of superoxide dismutase (SOD) and the level of malondialdehyde (MDA) in cauliflower (Brassica oleracea L.) in contaminated soil...The effects of different phosphate-amendments on lead (Pb) uptake, the activities of superoxide dismutase (SOD) and the level of malondialdehyde (MDA) in cauliflower (Brassica oleracea L.) in contaminated soils with 2500, or 5000 mg P2O5/kg soil of hydroxyapatite (HA), phosphate rock (PR), single-superphosphate (SSP) and the mix of HA/SSP (HASSP) were evaluated in pot experiments. Results showed that the Pb concentrations in shoots and roots decreased by 18.3%-51.6% and 16.8%-57.3% among the treatments respectively compared to the control samples. The efficiency order of these phosphate-amendments in reducing Pb uptake was as follows: HASSP= HA 〉 SSP ,= PR. With the addition of SSP, HA and the mix of HA/SSP, the SOD activity in shoot was reduced markedly (P 〈 0.05) compared with that in the control group. For example, the SOD activities in shoot by the treatments of HASSP, SSP, and HA in 5000 mg P2O5/kg were found to be only 51.3%, 56.2%, and 56.7%, respectively. Similar effects were also observed on the level of MDA in the shoots with a decrease in 24.5%-56.3%. The results verified the inference that phosphate compounds could be used to reduce the plant uptake of Pb and resist the Pb stress in the plant vegetated in Pb-contaminated soils.展开更多
The growths of two rice genotypes(Jin23A and CDR22) under the coexistence of As and Cr in solution culture with and without P were investigated.The result showed that rice shoot dry weight decreased due to the complex...The growths of two rice genotypes(Jin23A and CDR22) under the coexistence of As and Cr in solution culture with and without P were investigated.The result showed that rice shoot dry weight decreased due to the complex contamination of As and Cr,however,the influences on plant height,root length and root dry weight were insignificant.展开更多
基金supported by the Hi-Tech Research and Development Program (863) of China (No.2008AA10Z404)the special fund for the institute of commonweal scientific research in China (No. 628-16)
文摘The effects of different phosphate-amendments on lead (Pb) uptake, the activities of superoxide dismutase (SOD) and the level of malondialdehyde (MDA) in cauliflower (Brassica oleracea L.) in contaminated soils with 2500, or 5000 mg P2O5/kg soil of hydroxyapatite (HA), phosphate rock (PR), single-superphosphate (SSP) and the mix of HA/SSP (HASSP) were evaluated in pot experiments. Results showed that the Pb concentrations in shoots and roots decreased by 18.3%-51.6% and 16.8%-57.3% among the treatments respectively compared to the control samples. The efficiency order of these phosphate-amendments in reducing Pb uptake was as follows: HASSP= HA 〉 SSP ,= PR. With the addition of SSP, HA and the mix of HA/SSP, the SOD activity in shoot was reduced markedly (P 〈 0.05) compared with that in the control group. For example, the SOD activities in shoot by the treatments of HASSP, SSP, and HA in 5000 mg P2O5/kg were found to be only 51.3%, 56.2%, and 56.7%, respectively. Similar effects were also observed on the level of MDA in the shoots with a decrease in 24.5%-56.3%. The results verified the inference that phosphate compounds could be used to reduce the plant uptake of Pb and resist the Pb stress in the plant vegetated in Pb-contaminated soils.
基金supported by the National Natural Science Foundation of China (Grant Nos. 30671204 and 40620120436)the Knowledge Innovation Project of the Chinese Academy of Sciences (Grant No. KSCX2- YW-N-41-05)the National Major Programs of Water Pollution Control (Grant No. 2008ZX07212-001-05)
文摘The growths of two rice genotypes(Jin23A and CDR22) under the coexistence of As and Cr in solution culture with and without P were investigated.The result showed that rice shoot dry weight decreased due to the complex contamination of As and Cr,however,the influences on plant height,root length and root dry weight were insignificant.