Fate of Glyphosate during Production and Processing of Glyphosate-Resistant Sugar Beet (Beta vulgaris)
| Autor: | Franck E. Dayan, Abigail L. Barker |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Irrigation Food Handling Glycine Growing season Food Contamination Plant Roots 01 natural sciences chemistry.chemical_compound Aminomethylphosphonic acid Sugar biology fungi 010401 analytical chemistry Pesticide Residues Multiple applications food and beverages General Chemistry biology.organism_classification 0104 chemical sciences Horticulture chemistry Glyphosate Shoot Sugar beet Beta vulgaris General Agricultural and Biological Sciences Plant Shoots Herbicide Resistance 010606 plant biology & botany |
| Zdroj: | Journal of Agricultural and Food Chemistry. 67:2061-2065 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/acs.jafc.8b05672 |
| Popis: | Glyphosate is a widely used herbicide in commercial crop production for both conventional and herbicide-resistant crops. Herbicide-resistant crops, like glyphosate-resistant sugar beet, are often exposed to multiple applications of glyphosate during the growing season. The fate of this herbicide in resistant crops has not been publicly documented. We investigated the fate of glyphosate and main metabolite aminomethylphosphonic acid in glyphosate-resistant sugar beet grown in northern Colorado. Glyphosate residues were measured via directed ultra-high-performance liquid chromatography tandem mass spectrometry analysis of sugar beet shoots and roots throughout the growing season, from samples collected at various steps during sugar beet processing, and from flow-through samples of greenhouse-grown beets. Sugar beet rapidly absorbed glyphosate after foliar application, and subsequently translocated the herbicide to its roots, with between 2 and 3 μg/g fresh weight measured in both tissue types within 1 week of application. However, only trace amounts of glyphosate remained in either the shoots or the roots 2 weeks after application. Analysis of irrigation flow-through in pot assays confirmed that the herbicide readily exuded out of the roots. Processing of the beets removed glyphosate and herbicide levels were below the limit of detection in the crystalline sugar final product. |
| Databáze: | OpenAIRE |
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