| 张乙涵,伍 钧,陈 莉,贾春虹,李文华.基于植物根伸长终点测试四环素对植物的毒性阈值及其敏感性分布（SSD）[J].农业环境科学学报,2014,33(2):243-249. |
| 基于植物根伸长终点测试四环素对植物的毒性阈值及其敏感性分布（SSD） |
| Toxicity Thresholds of Tetracycline to Plants as Determined by Root Elongation and Its Species Sensitivity Distributions |
| |
| DOI：10.11654/jaes.2014.02.006 |
| 中文关键词: 四环素 植物毒性 物种敏感性分布 剂量效应 |
| 英文关键词: tetracycline phytotoxicity species sensitivity distributions（SSD） dose-response curve |
| 基金项目: |
|
| 摘要点击次数: 2415 |
| 全文下载次数: 2238 |
| 中文摘要: |
| 在实验室条件下以植物根伸长为测试终点，研究了添加不同水平的四环素对8种不同植物毒性的剂量-效应关系及不同植物对四环素毒害的敏感性差异。水溶液中四环素对植物的毒性阈值采用逻辑斯蒂克分布模型拟合得到，物种敏感性分布采用BurrlizO模型分析。结果表明，不同植物种子根伸长和芽伸长对四环素生态毒性的敏感顺序均为：根伸长>芽伸长。在0.1~1 mg·L-1浓度范围内，四环素能对植物根伸长和芽伸长产生刺激效应，而在浓度>10 mg·L-1时则表现出抑制作用。不同品种植物间，水溶液中四环素毒性阈值浓度（ECx）存在较大差异，这可能与植物品种差异有关。水溶液中不同植物对四环素毒性的敏感性频次分布存在明显差异，其中番茄和黄瓜对四环素较为敏感，而禾本科植物玉米对四环素毒害的响应最不敏感。此研究可为环境中四环素类抗生素的生态阈值建立与风险评价提供依据。 |
| 英文摘要: |
| Dose-response curves and species sensitivity distributions（SSD） of tetracycline to 8 different plant species were investigated by using plant root elongation as endpoints. Toxicity thresholds of tetracycline to plants in aqueous solution were obtained using Log-logistic distribution model, and SSDs were generated with BurrlizO model. The sensitivity of bud and root elongation to tetracycline was in order：root elongation>bud elongation. Plant root elongations were inhibited at high tetracycline concentrations（>10 mg·L-1）, but stimulated at low tetracycline concentrations（0.1~1 mg·L-1） in aqueous solution. Significant differences of the threshold values（ECx） of tetracycline to plants were observed among different species. Tomato and cucumber were the most sensitive, whereas maize was the least to tetracycline in aqueous solution. These findings provide useful information for assessment of tetracycline risk in environment. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
