Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 62, Issue 40, Pages 9657-9668Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf503221c
Keywords
atrazine; Medicago sativa; toxicity; accumulation; degradation
Funding
- National Natural Science Foundation of China [21377058]
- Special Fund for Agro-scientific Research in the Public Interest from the Ministry of Agriculture of China [201203022]
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Atrazine is a member of the triazine herbicide family intensively used to control weeds for crop production. In this study, atrazine residues and its degraded products in alfalfa (Medicago sativa) were characterized using UPLC TO F-MS/MS Most of atrazine absorbed in plants was found as, chemically modified derivatives like deisopropylated atrazine (DIA), dehydrogenated atrazine (DHA), or methylated atrazine (MEA), and some atrazine derivatives were conjugated through different functional groups such as sugar, glutathione, and amino acids. Interestingly, the specific conjugates DHA+hGSH (homoglutathione) and MEA-HCl+hGSH in alfalfa were detected. These results suggest that atrazine in alfalfa can be degraded through different pathyways. The increased activities of glycosyltransferase and glutathione S-transferase were determined to support the atrazine degradation models. The outcome of the work uncovered the detailed mechanism for the residual atrazine accumulation and degradation in alfalfa and will help to evaluate whether the crop is suitable to be cultivated in the atrazine polluted soil.
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