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| Effects of Zinc Sulfate on Nitrogen, Phosphorus, Potassium and Zinc Accumulation in Different Parts of Maize(Zea mays L.) Seedlings at Germination Stage |
| Received:May 06, 2014 |
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| KeyWord:zinc pollution;N, P, and K;maize;germination |
| Author Name | Affiliation | | ZHOU Yi | College of Urban Construction and Environment, Anhui Science and Technology University, Fengyang 233100, China
Institute of Anhui Engineering Technology on Maize Breeding, Fengyang 233100, China | | ZHENG Meng-meng | College of Urban Construction and Environment, Anhui Science and Technology University, Fengyang 233100, China
College of Environment and Energy, South China University of Technology, Guangzhou 510641, China | | LU Song-he | College of Urban Construction and Environment, Anhui Science and Technology University, Fengyang 233100, China | | CHENG Xin-xin | Institute of Anhui Engineering Technology on Maize Breeding, Fengyang 233100, China | | JIANG De | Institute of Anhui Engineering Technology on Maize Breeding, Fengyang 233100, China | | WANG Jian-fei | College of Urban Construction and Environment, Anhui Science and Technology University, Fengyang 233100, China | | LIU Zheng | Institute of Anhui Engineering Technology on Maize Breeding, Fengyang 233100, China |
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| Abstract: |
| Zinc(Zn) has been demonstrated to inhibit plant growth at excessive amount. The present study was focused on the accumulation in germ and radicle and the depletion in endosperm of maize(Zea mays L.) Zhengdan 958 of nitrogen, phosphorus and potassium under 0~1600 mg·L-1 ZnSO4·7H2O during germination and early seedling growth. Material transformation in all parts of the maize seedlings was strongly inhibited by concentrations of ZnSO4·7H2O above 800 mg·L-1. Potassium in the seeds showed the highest transfer rate, followed by phosphorus. Zinc accumulation in germ, radicle and endosperm increased linearly with Zn concentrations, and was in order of endosperm > radical > germ. Radicle was more sensitive to zinc pollution than germ. In the endosperm, nitrogen residues were positively related to zinc accumulation(P<0.05). Toxic effect of Zn on maize germination was probably due to reduced nitrogen mobilization caused by high zinc accumulation in the endosperm. |
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