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| Effects of foliar application of two typical nanomaterials on accumulation of polycyclic aromatic hydrocarbons in amaranth (Amaranthus tricolor) |
| Received:February 17, 2020 |
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| KeyWord:nanomaterials;foliage spraying;Amaranthus tricolor;polycyclic aromatic hydrocarbons |
| Author Name | Affiliation | E-mail | | YUAN Bin-bin | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
University of Chinese Academy of Sciences, Beijing 100864, China | | | ZHOU Dong-mei | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | dmzhou@issas.ac.cn | | MA Xiao-yue | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
University of Chinese Academy of Sciences, Beijing 100864, China | | | FANG Guo-dong | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | GAO Juan | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | |
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| Abstract: |
| Foliage spraying with silicon or zinc can significantly reduce the crop uptake of heavy metals in soil, but it has not been reported whether it can reduce the uptake of organic pollutants in soil by crops. In this study, two treatments with low(S1)and high polycyclic aromatic hydrocarbons(PAHs)concentrations(S2)were set. The effects of nano-SiO2, nano-ZnO, or their corresponding salts on the growth of Amaranthus tricolor and PAHs accumulation were investigated. The results showed that the spraying of these materials had no significant effect on plant chlorophyll, but increased the plant biomass in dry weight. In the S1 treatment, the biomass in the Na2SiO3 treatment increased by 42.0%; in the S2 treatment, the biomass in the Na2SiO3, nano-SiO2, and ZnSO4 treatments increased by 50.2%, 64.0%, and 77.7%, respectively. In the S1 treatment, compared with that of the control, fluoranthene absorption of Amaranthus tricolor was reduced by 46.5%, 35.3%, 27.4%, and 25.8% with foliage spraying of NaSiO3, nano-SiO2, ZnSO4, and nano-ZnO, respectively. Compared with that of the control, the absorption of pyrene was reduced by 25.6%. In the S2 treatment, no significant change occurred in each treatment. It was shown that under certain conditions, the spraying of nano-ZnO and nano-SiO2 reduced the accumulation of PAHs in Amaranthus tricolor, which may be a new method to reduce PAHs accumulation in plants. |
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