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| Accumulation and translocation of cadmium in different maize cultivars |
| Received:December 28, 2016 |
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| KeyWord:maize;cultivar difference;accumulation;translocation;cadmium form |
| Author Name | Affiliation | E-mail | | XIN Yan-wei | Shenyang Agriculture University, College of Land and Environment, Shenyang 110866, China | | | LIANG Cheng-hua | Shenyang Agriculture University, College of Land and Environment, Shenyang 110866, China | liang110161@163.com | | DU Li-yu | Shenyang Agriculture University, College of Land and Environment, Shenyang 110866, China | | | WU Yan | Shenyang Agriculture University, College of Land and Environment, Shenyang 110866, China | | | ZHANG Ya-nan | Shenyang Agriculture University, College of Land and Environment, Shenyang 110866, China | | | HU Yue | Shenyang Agriculture University, College of Land and Environment, Shenyang 110866, China | |
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| Abstract: |
| Eighteen maize cultivars, which are widely planted in the Northeast China, were selected as materials in a pot experiment. The aims of this study were to investigate the rule of cadmium (Cd) accumulation and translocation under Cd stress conditions (5 mg·kg-1), and explore the relationship between Cd form and its absorption by the crop. The results showed that the biomass and yield among cultivars were not significantly different, while the ability to accumulate and translocate Cd was significantly different in the root, stem, leaf, and grain of maize. Among the cultivars, accumulation of Cd in the grain in nine cultivars did not exceed the national hygienic standard of food safety, while that in stem in three cultivars and in leaves in two cultivars did not exceed the hygienic standard of feed. The Cd accumulation coefficients in root, stem, leaf, and grain of maize were 1.076~1.991, 0.093~0.430, 0.068~0.902, and 0.004~0.081, respectively. The transferring coefficients of stem and leaf ranged from 0.19 to 0.83 and from 0.03 to 0.44, respectively, which suggest that the maize cultivars had a certain ability to absorb Cd from the soil, but the transporting ability from shoot to stem, leaf, or grain was weak. Cd absorbed by maize had a positive correlation with the exchangeable state and negative correlation with the residual state. According to the evaluation of biomass, Cd content, enrichment, and transferring coefficient, four cultivars named Xin Dongdan 16, Dongdan 60, Shenhe 118, and Fuyou 9 could be recommended for cultivation in the mild and moderate Cd contaminated soils. |
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