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| Assessment of soil cesium pollution by Suaeda salsa in coastal wetland |
| Received:December 07, 2018 |
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| KeyWord:The Yellow River Delta;Suaeda salsa;Cs stress;germination;enrichment |
| Author Name | Affiliation | E-mail | | ZHANG Yan-liang | Shandong Provincial Key Laboratory of Eco-Environmental Science for the Yellow River Delta, Binzhou University, Binzhou 256603, China
College of Life and Environment Science, Minzu University of China, Beijing 100081, China | | | YANG Hong-jun | Shandong Provincial Key Laboratory of Eco-Environmental Science for the Yellow River Delta, Binzhou University, Binzhou 256603, China | sfyanghongjun@126.com | | XIA Jiang-bao | Shandong Provincial Key Laboratory of Eco-Environmental Science for the Yellow River Delta, Binzhou University, Binzhou 256603, China | | | SUN Jing-kuan | Shandong Provincial Key Laboratory of Eco-Environmental Science for the Yellow River Delta, Binzhou University, Binzhou 256603, China | | | QU Fan-zhu | Shandong Provincial Key Laboratory of Eco-Environmental Science for the Yellow River Delta, Binzhou University, Binzhou 256603, China | | | LI Lei | Shandong Provincial Key Laboratory of Eco-Environmental Science for the Yellow River Delta, Binzhou University, Binzhou 256603, China | |
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| Abstract: |
| To identify the Cs-hyper-accumulator of the Yellow River Delta, Suaeda salsa, a pioneer plant in coastal wetlands of the Yellow River Delta was investigated. The germination characteristics, migration and enrichment characteristics of Suaeda salsa under different levels of Cs stress were studied in pot-grown plants. Concentrations of Cs in the range 100~800 mg·L-1 had no significant effects on germination rate, germination potential, and germination index, but exerted a double effect of "low promoting high inhibition" on the growth of roots and buds. Furthermore, the roots of seedlings were more sensitive to Cs. Low concentration of Cs (100 mg·kg-1) promoted the growth and biomass of Suaeda salsa, indicating that Suaeda salsa has a degree of anti-stress capacity with respect to Cs. With increasing Cs content in the soil, accumulation of Cs increased in every organ. At a low concentration of Cs (≤ 200 mg·kg-1), the enrichment effect exhibited the following ranking:leaf > root > stem. At high concentrations (≥ 400 mg·kg-1), the enrichment effect exhibited the following ranking:leaf > stem > root, which indicated that Suaeda salsa had a strong enrichment and transport capacity for Cs, making it valuable in the remediation of Cs contaminated soils. |
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