Effect characteristics of cadmium-phenanthrene interaction on cadmium-phenanthrene uptake and transport from soil in maize
In this study,'Zheng dan 958'was selected as the study object due to its high level of resistance to Cd and phenanthrene.An indoor pot experiment was performed to determine the impact of the interaction between soil-borne Cd(0,2.5,and 5 mg/kg)and Phe(0,1 and 50 mg/kg)on the uptake and transport of soil Cd and phenanthrene in maize.The results showed that the growth of'Zheng dan 958'was positively stimulated by single Phe stress treatments.The plant height and biomass were not affected much by the single pollution of Cd.However,the coexistence of cadmium and phenanthrene hindered the plant height in variable degrees.Also the plant height of maize seedlings was greatly raised by 8.22%compared to the single cadmium pollution.The plant height was significantly reduced by 13.65%compared to that under the single Phe pollution.While the effect on biomass was not significant.The presence of low and high concentrations of Phe inhibited the absorption and accumulation of Cd in root of maize seedlings.Compared different treatments of Phe with the single of,Low concentration Phe treatment decreased the Cd content in root by 29.40%and 32.70%compared to that of the low and high concentration of Cd pollution suggesting antagonistic effects of low concentration Phe on Cd pollution.The presence of high concentration Phe promoted the absorption and accumulation of Cd in the stem and leaf of maize seedlings.The Cd content in stem and leaf significantly increased by 22.22%under the high concentration Phe and Cd treatment compared with that under the single pollution of low concentration of Cd.The synergy between the two was significant.The presence of Cd promoted the accumulation of Phe in the roots,stems and leaves of maize seedlings.Compared treatments of Cd with the single pollution treatment with low concentration of Phe,The presence of low concentration Cd significantly increased of the Phe content in root by 61.84%.The presence of high concentration Cd significantly increased the Phe content in the stems and leaves of maize seedlings by 187.53%,which showed significant synergy between the two.In addition,the presence of Phe promoted the transport of Cd from root to stem and leaf in'Zheng dan 958'.The presence of Cd also promoted the transport of Phe.Therefore,maize'zheng dan 958'is not available for cultivating and edible on the contaminated soils with Cd and Phe.But it is better to be a soil remediation crop for compound contamination.
cadmiumphenanthrenecornInteractioncharacteristics of accumulation
万方数据
维普
