富绿酸对除草剂阿特拉津对小鳞苔属毒性的影响

IF 2.7 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Bulletin of Environmental Contamination and Toxicology Pub Date : 2024-05-17 DOI:10.1007/s00128-024-03902-0
P Chris Wilson, Francisca O Hinz, Ilana Farrell
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引用次数: 0

摘要

富维酸(FA)是环境中普遍存在的溶解有机碳成分。很少有研究评估它们对除草剂对非目标水生植物的生物利用率的潜在影响。本研究评估了 FA 对水生植物 Lemna minor 的阿特拉津(ATZ)生物利用率的潜在影响。在静态条件下,植物在含有三种 FA 浓度(0、5 和 15 毫克/升)的培养基中分别接触 0、15、30、60、125 和 750 微克/升的 ATZ。在接触 7 天和 14 天后对叶片进行计数,并计算内在生长率 (IGR) 和叶片总产量以进行分析。确定了每个 FA 处理系列(0、5 或 15 mg/L)中阿特拉津的无观测不良效应浓度(NOAEC)和低观测不良效应浓度(LOAEC),并估算了 EC50。除 0 mg/L-FA 系列的产量(30/60)和 5 mg/L-FA 系列的 IGR(30/60)外,产量和 IGR 的无观测不良效应浓度/低观测不良效应浓度均为 60/125 µg/L。接触 14 天后,所有处理和两个终点的无观测不良效应浓度/低观测不良效应浓度均为 30/60 µg/L。中等有效浓度范围为 88.2-106.1 µg/L(叶片生长,7 DAT)、158.0-186.0 µg/L(IGR,7 DAT)、74.7-86.3 µg/L(叶片生长,14 DAT)和 144.1-151.3 µg/L(IGR,14 DAT)。FA 浓度不会影响 ATZ 的毒性。
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Impacts of Fulvic Acid on the Toxicity of the Herbicide Atrazine to Lemna minor.

Fulvic acids (FA) are environmentally prevalent components of dissolved organic carbon. Little research has evaluated their potential influence on the bioavailability of herbicides to non-target aquatic plants. This study evaluated the potential impacts of FA on the bioavailability of atrazine (ATZ) to the aquatic plant Lemna minor. Plants were exposed to 0, 15, 30, 60, 125, and 750 µg/L ATZ in media containing three FA concentrations (0, 5, and 15 mg/L) in a factorial study under static conditions. Fronds were counted after 7- and 14-days exposure and intrinsic growth rates (IGR) and total frond yields were calculated for analysis. Atrazine NOAECs and LOAECs within each FA treatment series (0, 5, or 15 mg/L) were identified and EC50s were estimated. NOAEC/LOAECs for yield and IGR were 60/125 µg/L except for yield in the 0 mg/L-FA series (30/60) and IGR in the 5 mg/L-FA series (30/60). NOAEC/LOAECs were 30/60 µg/L for all treatments and both endpoints after 14 days exposure. EC50s ranged from 88.2 to 106.1 µg/L (frond production 7 DAT), 158.0-186.0 µg/L (IGR, 7 DAT), 74.7-86.3 µg/L (frond production, 14 DAT), and 144.1-151.3 µg/L (IGR, 14 DAT). FA concentrations did not influence the toxicity of ATZ.

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来源期刊
CiteScore
5.60
自引率
3.70%
发文量
230
审稿时长
1.7 months
期刊介绍: The Bulletin of Environmental Contamination and Toxicology(BECT) is a peer-reviewed journal that offers rapid review and publication. Accepted submissions will be presented as clear, concise reports of current research for a readership concerned with environmental contamination and toxicology. Scientific quality and clarity are paramount.
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