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| Cadmium Uptake and Transportation in Two Ramie Cultivars Under Zinc and Iron Deficiency |
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| KeyWord:ramie; Cd concentration; Zn; Fe; transportation |
| Author Name | Affiliation | | SHE Wei | Institute of Ramie, Hunan Agriculture University, Changsha 410128, China | | CUI Guo-xian | Institute of Ramie, Hunan Agriculture University, Changsha 410128, China | | ZHAO Dan-bo | Institute of Ramie, Hunan Agriculture University, Changsha 410128, China | | XIAO Cheng-xiang | Institute of Ramie, Hunan Agriculture University, Changsha 410128, China |
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| Abstract: |
| Ramie（Boehmeria nivea） is a China-originated perennial herb with high biomass and elevated cadmium（Cd） tolerance. Ramie fibers are mainly produced as textile materials, hence minimizing the potential hazard of toxic metals in food chain. This study was carried out in hydroponic conditions to test the effects of Zn and Fe deficiency on Cd concentrations and distribution in two ramie cultivars. Four Zn and/or Fe treatments with Cd level at 5 mg·kg-1 were used, ①no Zn plus Fe（+Fe-Zn）；②no Fe plus Zn（-Fe+Zn）；③no Fe or Zn（-Fe-Zn）；④CK（+Fe+Zn）. Cadmium concentration, translocation and distribution were varied between two ramie cultivars. Compared with the CK, plant height, biomass of stem and leaf, biomass of root for 2 ramie cultivars in Zn and/or Fe deficiency were significantly reduced by 10.24%～21.64%, 1.02%～6%, 2.04%～12.24% respectively（P<0.05）. Supplying normal Zn and Fe increased the height and biomass of ramie, while Zn and/or Fe-deficient decreased the biomass of ramie. Cadmium concentrations of ramie were roots>stems>leaves. Treatments with Zn or Fe-deficient promoted Cd concentration and accumulation in two ramie cultivars. Zn and/or Fe deficiency increased TFroot to leaf and TFroot to stem. |
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