absorção, translocação e exsudação radicular de glyphosate em clones de eucalipto: clones absorption, translocation and radicular glyphosate exudation in eucalyptus sp
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Abstract
To evaluate absorption, translocation and radicular glyphosate exudation in two Eucalyptus sp. clones (2277 and 531), 14C-glyphosate at 1440 g ha-1 were distributed on the third and fourth leaf blade, under 0,030 μCi of radioactivity. Evaluations were performed 0, 2, 8, 32 and 72 hours after herbicide application - HAA. After 8 HAA, 14C-glyphosate on the leaf was similar in both clones. However, considering the whote plant, it was higher in 2277, at any evaluation time. After washing the leaves, higher amount of 14C-glyphosate was verified in the water of 531, indicating its smaller herbicide absorption. In the ground tissue and in the roots, 14C-glyphosate was similar in both clones, at any application time though, showing higher concentrations in the roots. Between 0.78 and 1.16% any of the applied herbicide was exuded into the nutritive solution, without showing difference on translocation and radicular exudation in both clones. The different absorption between the clones can be a likely explanation for the the different tolerance among genotypes.
| Reference Key |
machado2009plantaabsoro,
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| Authors | ;A.F.L. Machado;L.R. Ferreira;L.D.T. Santos;J.B. Santos;F.A. Ferreira;R.G. Viana |
| Journal | anti-cancer agents in medicinal chemistry |
| Year | 2009 |
| DOI |
10.1590/S0100-83582009000300016
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| URL | |
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