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| The effect of selenium on cadmium accumulation,chemical forms and the resistance of peanuts |
| Received:October 20, 2017 |
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| KeyWord:selenium;cadmium;biomass;photosynthesis;chemical form |
| Author Name | Affiliation | E-mail | | BIAN Wei-le-si | College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China | | | YAN Jia-pu | College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China | | | CUI Liang | Chengyang Branch, Qingdao Environmental Protection Bureau, Qingdao 266109, China | | | ZHANG Lei | College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China | zhanglei_zhxy@163.com |
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| Abstract: |
| This paper investigates the influence of selenium on growth,physiological resistance,accumulation and chemical forms of cadmium(Cd) in peanuts under varied treatments of Cd(0,3,30 mg·kg-1) through a series of experiments. Results showed that,application of Se influences peanut biomass significantly for all different Cd levels,and Se amendment decreased the accumulation of MDA and cell membrane damage. Cd stress significantly reduced the net photosynthesis rate of peanuts,and the net rate of photosynthesis first increased and then decreased with increasing Se levels. Under Cd pollution(3,30 mg·kg-1),Cd concentrations in the peanut plants first decreased,then increased with increasing Se levels. The lowest Cd concentration in peanuts occured when treated with 0.25 mg·kg-1 Se application. When soil Cd concentrations were 3 mg·kg-1 and 30 mg·kg-1,Cd concentrations in the shoots and roots decreased by 12.71%,46.13% and 21.29%,36.00%,respectively,under 0.25 mg·kg-1 Se treatment. NaCl,HAc,and water-extractable Cd were predominant in peanuts. Application of Se increased HAc and water-extractable Cd. Results showed that moderate Se application could effectively inhibit Cd activity and decrease Cd transportation and accumulation in peanut plants. |
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