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| Effects of antimony stress on physiological indexes and enrichment and transport characteristics of mulberry |
| Received:January 07, 2020 |
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| KeyWord:antimony;mulberry;physiology and biochemistry;enrichment transport |
| Author Name | Affiliation | E-mail | | GENG Li-sha | School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China | | | YANG Zai-fu | School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China | zzfyang@dhu.edu.cn | | XU Zhi-nan | School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China | | | SHU Wen-jun | School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China | | | ZHU Tong | School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China | |
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| Abstract: |
| In order to explore the response mechanism and cumulative remediation effect of mulberry(Morus alba L.)under Sb stress, the soil culture method was used in this experiment. Two year old mulberry was used as the experimental material, and 12 concentration gradients were set for Sb3+(50, 100, 200, and 300 mg·kg-1), Sb5+(100, 200, 400, and 600 mg·kg-1), and Sb3++Sb5+(25 + 50, 50 + 100, 100 + 200, and 150 + 300 mg·kg-1).The contents of chlorophyll, superoxide dismutase(SOD), catalase(CAT), malondialdehyde(MDA), and glutathione in mulberry leaves were determined under different Sb treatments. The Sb content in various parts of the mulberry plant was measured and the enrichment transfer coefficient was calculated. The results showed that both single and compound Sb stress can inhibit the synthesis of chlorophyll in mulberry leaves. For the SOD and CAT activities, each treatment showed that a low concentration increased activity and high concentration inhibited activity. Compared with the control group, the content of MDA significantly increased under Sb stress. The bioconcentration factors of each Sb treatment was smaller than that of the control group. The results showed that the distribution of Sb in mulberry under single Sb3+ stress was root > branch > stem > leaf, and was root > stem > leaf > branch under root Sb3+ and Sb5+ stress. The increase in Sb contamination inhibits the transportation of Sb from mulberry roots to mulberry leaves and reduces the enrichment ability of mulberry. |
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