Increased hormetic dose of glyphosate causes oxidative stress and reduces yield in common bean

Pacheco de Almeida Prado Bortolheiro, Fernanda; Brunelli-Nascentes, Marcela Cristina; Luiz Santos, Hariane; de Almeida Silva, Marcelo

doi:10.1016/j.stress.2023.100231

Plant Stress

2023

DOI: 10.1016/j.stress.2023.100231

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Increased hormetic dose of glyphosate causes oxidative stress and reduces yield in common bean

Fernanda Pacheco de Almeida Prado Bortolheiro,

Marcela Cristina Brunelli-Nascentes,

Hariane Luiz Santos

et al.

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2024

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Glyphosate hormesis stimulates tomato (Solanum lycopersicum L.) plant growth and enhances tolerance against environmental abiotic stress by triggering nonphotochemical quenching

Wang,

Cui,

et al. 2024

Pest Management Science

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BackgroundGlyphosate is the most widely applied herbicide in the world. Hormesis caused by low glyphosate doses has been widely documented in many plant species. However, the specific adaptative mechanism of plants responding to glyphosate hormesis stimulation remains unclear. This study focused on the biphasic relationship between glyphosate dose and tomato plant growth and how glyphosate hormesis stimulates plant growth and enhances tolerance to environmental stress.ResultsWe constructed a hormesis model to describe the biphasic relationship with a maximal stimulation (MAX) of 162% above control by glyphosate at 0.063 g ha−1. Low‐dose glyphosate increased photosynthetic pigment contents and improve photosynthetic efficiency, leading to plant growth stimulation. We also found that glyphosate hormesis enhanced plant tolerance to diuron (DCMU; a representative photosynthesis inhibitor) by triggering the non‐photochemical chlorophyll fluorescence quenching (NPQ) reaction to dissipate excess energy stress from photosystem II (PSII). Transcriptomic analysis and quantitative real‐time PCR results revealed that the photosynthesis–antenna proteins pathway was the most sensitive to glyphosate hormesis, and PsbS (encoding photosystem II subunit S), ZEP (encoding zeaxanthin epoxidase), and VDE (encoding violaxanthin de‐epoxidase) involved in NPQ played crucial roles in the plant response to glyphosate hormesis.ConclusionThese results provide novel insights into the mechanisms of plant hormesis and is meaningful to the application of glyphosate hormesis in agriculture.This article is protected by copyright. All rights reserved.

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Glyphosate hormesis stimulates tomato (Solanum lycopersicum L.) plant growth and enhances tolerance against environmental abiotic stress by triggering nonphotochemical quenching

Wang,

Cui,

et al. 2024

Pest Management Science

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Increased hormetic dose of glyphosate causes oxidative stress and reduces yield in common bean

Cited by 1 publication

References 45 publications

Glyphosate hormesis stimulates tomato (Solanum lycopersicum L.) plant growth and enhances tolerance against environmental abiotic stress by triggering nonphotochemical quenching

Glyphosate hormesis stimulates tomato (Solanum lycopersicum L.) plant growth and enhances tolerance against environmental abiotic stress by triggering nonphotochemical quenching

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