Plant exposure to glyphosate-based herbicides and how this might alter plant physiological and structural processes

Author:

Freitas-Silva Larisse1,de Araújo Hugo Humberto2,Meireles Camila Santos2,Campos da Silva Luzimar3

Affiliation:

1. Universidade Federal do Reconcavo da Bahia, 186074, Cruz das Almas, BA, Brazil;

2. Universidade Federal de Viçosa, 28120, Departamento de Biologia Vegetal, Vicosa, MG, Brazil;

3. Universidade Federal de Viçosa, 28120, Departamento de Biologia Vegetal, Vicosa, MG, Brazil, 36570-000;

Abstract

Chemical weed control is essential to ensure high levels of productivity in agricultural areas, and glyphosate-based herbicides (GBHs) are the most widely used herbicides at a global scale. GBHs inhibit the 5-enolpyruvyl-shikimate-3-phosphate synthase (EPSPS) enzyme, which impairs the shikimate pathway and often leads to plant death. However, indirect effects of GBHs on plant physiology can also lead to plant death. The objectives of this review are to discuss the biochemical, physiological and structural changes GBH application produces in plant species, in addition to inhibiting EPSPS (EC 2.5.1.19), and to reveal how these changes contribute to plant death. We conclude that GBHs promote plant death not only because of EPSPS inhibition but also due to biochemical, physiological and structural changes. Some changes are recurrent and can be used as biomarkers of GBH sensitivity, which can contribute to future works that monitor the presence of these herbicides in plant communities near agricultural areas.

Publisher

Canadian Science Publishing

Subject

Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics

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