期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 28, 期 17, 页码 21334-21346出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-12003-4
关键词
Anatomical change; Herbicide; Oxidative stress; Visual injury
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [309308/2018-6]
This study evaluated the response of Eugenia uniflora leaves to glyphosate, finding that the herbicide caused various adverse effects on the plant, including altered photosynthetic parameters and visible damage. The presence of visible damage suggests that E. uniflora has the potential to be used as a bioindicator of glyphosate in future biomonitoring projects.
The herbicide glyphosate can cause severe ecotoxicological effects on non-target organisms. Eugenia uniflora L. (Myrtaceae) is very important for in situ environmental biomonitoring due to its wide distribution in the Atlantic Forest biome. Thus, this study aimed to evaluate the response of E. uniflora leaves to glyphosate. Eight-month-old plants were exposed to an aerial application of the herbicide at concentrations of 0, 144, 432, 864, and 1440 g a. e. ha(-1) (grams of acid equivalent per hectare). Evaluations were performed on the 12th day after the glyphosate application (DAA). An accumulation of shikimic acid in the leaves of E. uniflora was observed. Glyphosate altered the photosynthetic parameters of the treated plants, with a drastic decrease in the photosynthetic rate, stomatal conductance, transpiration, and pigment content. There was an increase in Ci/Ca, lipid peroxidation, and electrolyte extravasation levels. Glyphosate also promoted ultrastructural, anatomical and visible damage to the E. uniflora leaves. Our findings indicate that glyphosate is phytotoxic to the native species E. uniflora at the tested doses. The presence of visible damage suggests that E. uniflora has remarkable potential as a bioindicator of glyphosate in the environment, making it a possible species for future biomonitoring projects.
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