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| CARDINALI,V.C.B.; DIAS,A.C.R.; MUELLER,T.C.; ABERCROMBIE,L.; STEWART JR.,C.N.; TORNISIELO,V.L.; CHRISTOFFOLETI,P.J.. |
| In Brazil, few research works on mechanisms of weed resistance to glyphosate have been conducted so far. Therefore, this research aimed to study analytical procedures determining the relation between the concentration of plant shikimate after glyphosate application and the plant resistance to this herbicide; and evaluate the glyphosate absorption and translocation into two resistant ® and susceptible (S) horseweed biotypes to glyphosate. Horseweed plants with nine true leaves received glyphosate (720 g a.e. ha-1), and 2, 3, 4, 7 and 10 days after application (DAA) the concentration of shikimic acid was measured by HPLC. In another experiment, plants were treated with radiolabeled glyphosate (14C) (1.456 MBq mmol-1 specific activity) and radioactivity was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conyza bonariensis; High Performance Liquid Chromatography; EPSPS; Selection; Radioactivity. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100109 |
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| MENDES,K.F.; MARTINS,B.A.B.; REIS,F.C.; DIAS,A.C.R.; TORNISIELO,V.L.. |
| ABSTRACT In Brazil, the “Pesticide Act” (Act no. 7,802/89) has introduced new criteria related to the environment, public health and agronomic performance in the analyses of pesticide-related activities. Likewise, radioisotopes are used for environmental behavior and in planta studies, since they provide some advantages in comparison to chemical measures, including greater sensitivity, stepwise description of a particular element in a metabolic system, and pesticide position and detection through X-ray films and/or radio image (in plants) and liquid scintillation (in plants and soil), respectively. This review describes methodologies related to radioisotope utilization in studies on herbicide absorption, translocation and metabolism in plants, as well as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Liquid scintillation spectrometry; Environmental behavior; 14C-labeled molecule. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100232 |
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