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基于根伸长的典型叶类蔬菜 Se 生态风险

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Ecological risk of Se in typical leafy vegetables based on root elongation

期刊信息

合肥工业大学（自然科学版），2025年3月，第48卷第3期：369-375，394

DOI: 10.3969/j.issn.1003-5060.2025.03.012

作者信息

张忠恩 $ ^{1} $，李湘凌 $ ^{1,2} $，赵燕 $ ^{1} $，吴安云 $ ^{1} $，卢新哲 $ ^{3,4} $，魏迎春 $ ^{3,4} $

(1. 合肥工业大学资源与环境工程学院，安徽合肥 230009；2. 安徽省矿产资源与矿山环境工程技术研究中心，安徽合肥 230009；3. 自然资源部平原区农用地生态评价与修复工程技术创新中心，浙江杭州 311203；4. 浙江省地质调查院，浙江杭州 311203)

摘要和关键词

摘要: 为探究硒(Se)对叶类蔬菜的毒性效应,文章通过水培实验,以18种典型叶类蔬菜萌发期的相对根伸长(relative root elongation, RRE)作为评测终点,采用Log-logistic、Hormesis模型确定典型叶类蔬菜的 $ EC_{20} $、 $ EC_{50} $,基于Burr-Ⅲ模型分析18种蔬菜Se敏感性差异并计算最大环境有害浓度(hazardous concentration for 5% of species, $ HC_{5} $)。结果表明:部分蔬菜无Se兴奋效应,部分蔬菜具有Se兴奋效应,兴奋效应质量浓度范围为0.1~5.0 mg/L,Se对蔬菜RRE的兴奋效应和毒害性与蔬菜种类密切相关;品种大白菜中白(DBCZ)、生菜孔雀菜(SCKQ)和空心菜竹叶(KXCZ)表现出较强的Se耐性,而品种茼蒿板叶(THBY)、茼蒿圆叶(THYY)和苋菜圆叶(XCYY)表现出较强的敏感性。不同蔬菜的Se毒性阈值差异明显, $ EC_{20} $和 $ EC_{50} $范围分别为0.48~10.59 mg/L和1.88~19.60 mg/L;兴奋效应显著影响蔬菜的剂量-效应关系,Se兴奋效应组的模型参数(最大与最小RRE差值a、毒害性变化速率b、 $ EC_{20} $和 $ EC_{50} $)平均值显著大于无兴奋效应组;保护95%蔬菜的20%效应毒性阈值( $ HC_{5}^{20} $)和50%效应毒性阈值( $ HC_{5}^{50} $)分别为0.29、1.20 mg/L,蔬菜种类对 $ HC_{5} $影响极大,敏感性品种缺失会导致 $ HC_{5} $显著提高,耐性品种缺失会一定程度上降低 $ HC_{5} $。

关键词: 硒；物种敏感性分布；毒性阈值；叶类蔬菜

Authors

ZHANG Zhongen $ ^{1} $, LI Xiangling $ ^{1,2} $, ZHAO Yan $ ^{1} $,

(1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Province Engineering Research Center for Mineral Resources and Mine Environments, Hefei 230009, China; 3. Technology Innovation Center of Ecological Evaluation and Remediation of Agricultural Land in Plain Area, Ministry of Natural Resources, Hangzhou 311203, China; 4. Zhejiang Institute of Geological Survey, Hangzhou 311203, China)

Abstract and Keywords

Abstract: To explore the toxic effect of selenium(Se) on leafy vegetables, the toxicity thresholds $ EC_{20} $ and $ EC_{50} $ of 18 typical leafy vegetables were determined using Log-logistic and Hormesis models through a hydroponic experiment with their relative root elongation (RRE) during seed germination as test endpoint. Based on the Burr-III model, the sensitivity differences of the 18 vegetables to Se were analyzed and hazardous concentration for 5% of species ( $ HC_{5} $) was calculated. The results showed that some vegetables had no excitatory effect of Se, while some vegetables presented an excitatory effect of Se, with a concentration range of 0.1-5.0 mg/L. The excitatory effect and toxicity of Se on the RRE of vegetables were closely related to vegetable species. The cultivars DBCZ, SCKQ and KX-CZ were highly Se-tolerant, while THBY, THYY and XCYY were highly Se-sensitive. The Se toxicity thresholds of different vegetables were significantly different, with $ EC_{20} $ and $ EC_{50} $ ranging from 0.48 mg/L to 10.59 mg/L and 1.88 mg/L to 19.60 mg/L, respectively. The excitatory effect signifi

Keywords: selenium(Se); species sensitivity distribution; toxicity thresholds; leafy vegetables

基金信息

浙江省重点研发计划资助项目（2021C04020）；浙江省自然资源厅科技资助项目（2020-45）和浙江省地勘资金资助项目（2019007）

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