Respostas Morfoanatômicas de Raízes de Copaifera langsdorffii Desf. Expostas a Uma Deriva Simulada de Glifosato

Abstract

Copaifera langsdorffii or copaiba as it is popularly known, is a species of plant native to the Cerrado that has a wide geographic distribution. There is a cultural interest in this vegetable due to the production of an oil, in which pharmacological properties are found. With the increase in the use of herbicides such as glyphosate in areas of cultivation of plants of agronomic interest, the drift movement has intensified, in which the herbicide can reach areas close to remnants of native vegetation and cause stress on these plants. In this sense, the aim of this article was to verify morphoanatomical responses of Copaifera langsdorffii roots exposed to a simulated glyphosate drift applied to the aerial portion of the plants. For this, the experiment was conducted in the greenhouse of the Federal University do Tocantins, campus Palmas. The plants were subjected to 3 different dosages of the herbicide glyphosate (200, 400 e 800 g i.a. ha-1 ) and the witness (0), being conducted in a randomized block design. Damages in the external morphology were not visible, from the quantitative data they showed that there was no significant difference in the analyzed parameters. However, changes were visible in anatomy and biochemistry being demonstrated in the form of degradation in anatomical tissues, reduction in the production of phenolic compounds and starch, even with the application of the herbicide being done only in the aerial part. However, new experiments are needed to increase the exposure time to check for changes in morphology.