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| Cadmium and mineral element accumulation and IRT1 gene expression of Amaranth hybidus L. under iron/zinc deficiencies or salt stress |
| Received:October 16, 2015 |
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| KeyWord:amaranth;minerals;salt stress;IRT1 |
| Author Name | Affiliation | E-mail | | YU Dan-ping | School of Environment, Jinan University, Key Laboratory of Environmental Exposure and Health of Guangzhou City, Guangzhou 510632, China
Guangdong provincial research center of environmental pollution control and remediation material, Guangzhou 510632, China | | | LI Qu-sheng | School of Environment, Jinan University, Key Laboratory of Environmental Exposure and Health of Guangzhou City, Guangzhou 510632, China
Guangdong provincial research center of environmental pollution control and remediation material, Guangzhou 510632, China | | | WANG Li-li | School of Environment, Jinan University, Key Laboratory of Environmental Exposure and Health of Guangzhou City, Guangzhou 510632, China
Guangdong provincial research center of environmental pollution control and remediation material, Guangzhou 510632, China | towanglili@163.com | | XU Zhi-min | School of Environment, Jinan University, Key Laboratory of Environmental Exposure and Health of Guangzhou City, Guangzhou 510632, China
Guangdong provincial research center of environmental pollution control and remediation material, Guangzhou 510632, China
College of Life Science and Technology, Jinan University, Guangzhou 510632, China | | | GUO Shi-hong | School of Environment, Jinan University, Key Laboratory of Environmental Exposure and Health of Guangzhou City, Guangzhou 510632, China
Guangdong provincial research center of environmental pollution control and remediation material, Guangzhou 510632, China
College of Life Science and Technology, Jinan University, Guangzhou 510632, China | | | HU Ni | School of Environment, Jinan University, Key Laboratory of Environmental Exposure and Health of Guangzhou City, Guangzhou 510632, China
Guangdong provincial research center of environmental pollution control and remediation material, Guangzhou 510632, China | | | CHEN Hui-jun | School of Environment, Jinan University, Key Laboratory of Environmental Exposure and Health of Guangzhou City, Guangzhou 510632, China
Guangdong provincial research center of environmental pollution control and remediation material, Guangzhou 510632, China | |
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| Abstract: |
| Previous research has showed that iron-regulated transporter 1(IRT1) gene plays an important role in the accumulation and transfer of metals in plants. Here a low Cd-accumulating cultivar Baigenjianye(B) and a high Cd-accumulating cultivar Huahong(H) were used to investigate the characteristics of mineral element and Cd accumulation by and IRT1 expression level in roots of Amaranth hybidus L. under iron(Fe) or zinc(Zn) deficiencies or salt stress. Quantitative PCR was used to determine the expression level of IRT1. Biomass of two cultivars obviously decreased in the treatments, with the greatest reduction observed in Fe deficiency. The accumulation of Cd and mineral elements significantly(P<0.05) increased under Fe and Zn deficiency treatments. However, salt stress showed a significant(P<0.05) inhibiting effect on Cd accumulation but a significant(P<0.05) promotion on the accumulation of mineral elements. The concentrations of Cd, Fe, Zn and Mg, and the expression of gene IRT1 in root protoplasts were obviously higher in high Cd-accumulating cultivar Huahong(H)than those in low Cd-accumulating cultivar Baigenjianye(B). Furthermore, elevated expression levels of IRT1 promoted the concentrations of Cd, Fe, Zn and Mg in stems and leaves. Therefore, while Cd concentration in crops is concerned, the content of minerals in the soil should be paid attention to at the same time. |
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