Prospecção da toxicidade do filtro solar avobenzona em plantas terrestres

Abstract

Avobenzone (AVO) sunscreen is a compound with a high volume of production in the world and constantly released into the environment. Its presence is mainly due to the incorporation of sewage biosolids for fertilization purposes, the leaching of cultivated soils and the use of wastewater in its entirety. Information about the action of this sunscreen on plants is practically non-existent. In the present study, the ecotoxicity of AVO was evaluated at concentrations 1, 10, 100 and 1000 ng/L. All concentrations caused a reduction in root growth in Allium cepa L., Cucumis sativus L. Lycopersicum esculentum Mill. seeds, as well as a mitodepressive effect, changes in the mitotic spindle and a reduction in root growth in A. cepa bulbs. The disturbances to the cell cycle occurred because AVO disarmed the enzymatic defense system of the root meristems and caused excess hydroxyl radicals and superoxides, in addition to lipid peroxidation in the cells. It is concluded that AVO has a high potential for damage to plants and can significantly impact agricultural production and the development of non-cultivated plants.