| 张衍亮,杨红军,夏江宝,孙景宽,屈凡柱,李磊.滨海湿地盐地碱蓬对铯污染的响应及富集规律[J].农业环境科学学报,2019,38(3):627-632. |
| 滨海湿地盐地碱蓬对铯污染的响应及富集规律 |
| Assessment of soil cesium pollution by Suaeda salsa in coastal wetland |
| 投稿时间：2018-12-07 |
| DOI：10.11654/jaes.2018-1542 |
| 中文关键词: 黄河三角洲 盐地碱蓬 铯胁迫 萌发特性 富集规律 |
| 英文关键词: The Yellow River Delta Suaeda salsa Cs stress germination enrichment |
| 基金项目:国家重点研发计划项目（2017YFC0505904）；国家自然科学基金青年项目（21507006）；滨州学院实验技术研究项目（BZXYSYXM201616） |
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| 中文摘要: |
| 为了探讨黄河三角洲地区先锋植物盐地碱蓬对铯胁迫的富集修复能力，以黄河三角洲滨海湿地先锋植物盐地碱蓬为材料，盆栽条件下研究其在不同Cs浓度胁迫下的萌发特性和迁移、富集特征。结果表明：Cs浓度为100~800 mg·L-1时对盐地碱蓬发芽率、发芽势、发芽指数的影响均不显著，但对胚根和胚芽的生长具有"低促高抑"的双重作用，且胚根对Cs更具敏感性；低浓度Cs（100 mg·kg-1）对盐地碱蓬生长具有促进作用，使其生物量增加，表明盐地碱蓬对Cs具有一定的抗胁迫能力；随着Cs浓度的升高，盐地碱蓬对Cs的富集量也逐渐增大，当Cs浓度≤ 200 mg·kg-1时，富集情况为叶>根>茎；当Cs浓度≥ 400 mg·kg-1时，富集情况为叶 > 茎 > 根，表明盐地碱蓬对Cs具有良好的富集与转运能力。研究表明，盐地碱蓬对Cs具有一定的耐受能力，在Cs污染土壤修复方面具有一定的应用前景。 |
| 英文摘要: |
| 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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