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Tolerance of Hymenaea courbaril L. to glyphosate

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Abstract

The objective was to evaluate the effect of the glyphosate on Hymenaea courbaril L. A randomized block design with five replications was implemented. Each experimental unit was composed of one plant in a 5 L container. The treatments were 0 “control”; 96; 240; 480; and 960 g ha−1 “corresponding to 10, 25, 50, and 100% of the commercial dose of glyphosate recommended for Caryocar brasiliense crop, respectively”. The evaluations were performed at 24 h and 60 days after application. Visual and anatomical evaluations did not change regardless of the dose, while the histochemical evaluation showed an accumulation of starch grains in leaf tissues. There was an increase in the photosynthetic rate, in the electron transport rate, and in the effective quantum yield of photosystem II at 24 h after application. At 60 days after the application of the treatments, the photosynthetic rate showed a slight decrease and the transpiratory rate showed quadratic behavior. An increase in plant height was observed up to the dose of 480 g ha−1, a linear increase in stem diameter and a decrease in the number of leaves with increasing glyphosate doses. These results show that the cuticle protected the plant, and that the little absorbed glyphosate increased photosynthesis and transpiration to favor the plants. We can conclude that the H. courbaril species is able to survive after contact with glyphosate during the evaluated time, with no visual and/or anatomical damage, showing increases in growth and physiological characteristics for the tested doses.

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Acknowledgements

The authors thank the Federal Institute of Education, Science and Technology and the Graduate Program in Agricultural Sciences (IFGoiano) agronomy of Rio Verde Campus! Plant anatomy and plant physiology laboratories. We also thank the Coordination (CAPES) and foundation for supporting research in the state of Goiás (FAPEG) to encourage research.

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Correspondence to Leandro Carlos.

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The research article ensures objectivity and transparency in research and secure that accepted principles of ethical and professional conduct have been followed. This original research article does not contain any studies with human participants or animals performed by any of the authors.

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de Faria, G.S., Carlos, L., Jakelaitis, A. et al. Tolerance of Hymenaea courbaril L. to glyphosate. Ecotoxicology 31, 168–177 (2022). https://doi.org/10.1007/s10646-021-02499-y

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  • DOI: https://doi.org/10.1007/s10646-021-02499-y

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