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首页> 外文期刊>Environmental toxicology and chemistry >THE CAPACITY OF SWITCHGRASS (PANICUM VIRGATUM) TO DEGRADE ATRAZINE IN A PHYTOREMEDIATION SETTING
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THE CAPACITY OF SWITCHGRASS (PANICUM VIRGATUM) TO DEGRADE ATRAZINE IN A PHYTOREMEDIATION SETTING

机译：在植物修复环境中开关草（白NIC）降解阿特拉津的能力

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摘要

Atrazine is a widely used herbicide in agriculture. Non-point source contamination of groundwater and drinking water may pose a significant threat to humans, wildlife, and the environment. Phytoremediation may provide a cost-effective strategy for reducing non-point source contamination of atrazine from agricultural runoff. Previous studies have shown that the rhizosphere of the native prairie grass, switchgrass (Panicum virgatum) is capable of enhancing the degradation of atrazine in soils. Biodegradation also may occur within the plant biomass; however, the extent to which this occurs has not been studied. We hypothesize that switchgrass has the capacity to degrade atrazine in vivo, in addition to the microbial biotransformation that occurs in its rhizosphere. The goals of this study were to characterize the ability of switchgrass to take up atrazine from soils, quantify the amount of biodegradation occurring in the plant, and quantify the amount of degradation occurring in the rhizosphere. Switchgrass seedlings were transplanted into autoclaved and non-autoclaved sand containing 10 μg/g atrazine in sand. Treatments were sacrificed on days 0, 3, and 7. Sand and plant tissue extracts were analyzed by gas chromatography to determine the concentration of atrazine and metabolites in sand and plant tissues. Results demonstrated that leaf biomass is capable of detoxifying atrazine, because metabolites were present in leaf material and not in the sand or root.
机译：阿特拉津是农业上广泛使用的除草剂。地下水和饮用水的非点源污染可能对人类，野生生物和环境构成重大威胁。植物修复可为减少农业径流对阿特拉津的面源污染提供一种经济有效的策略。先前的研究表明，天然草原草，柳枝switch（Panicum virgatum）的根际能够促进土壤中阿特拉津的降解。植物生物量内也可能发生生物降解；但是，这种情况的发生程度尚未得到研究。我们假设柳枝switch除了在其根际发生微生物生物转化外，还具有体内降解阿特拉津的能力。这项研究的目的是表征柳枝switch从土壤中吸收阿特拉津的能力，量化植物中发生的生物降解量，以及量化根际中发生的降解量。将柳枝seedling幼苗移植到砂中含有10μg/ g阿特拉津的高压灭菌和非高压灭菌的沙子中。在第0、3和7天处死处理。通过气相色谱法分析沙子和植物组织提取物，以确定沙子和植物组织中阿特拉津和代谢产物的浓度。结果表明，叶片生物量能够使阿特拉津解毒，因为代谢产物存在于叶片材料中，而不是在沙子或根中。

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