Ecosystem consequences of herbicides: the role of microbiome

Ruuskanen, Suvi; Fuchs, Benjamin; Nissinen, Riitta; Puigbò, Pere; Rainio, Miia J.; Saikkonen, Kari; Helander, Marjo

doi:10.1016/j.tree.2022.09.009

Cited by 77 publications

(38 citation statements)

References 80 publications

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“…2023; Ruuskanen et al . 2023). In several plant species, glyphosate residues in soil have elicited substantial changes in phytohormone concentrations, which are key players in mediating plant chemical crosstalk with mutualistic symbiotic microbes and the defence response to herbivorous insects (Robert‐Seilaniantz et al .…”

Section: Introductionmentioning

confidence: 99%

“…Organic farming has been shown to successfully promote natural pest control when compared with conventional practices, which may be linked to higher microbial diversity and better functionality of plant symbiotic microbes (Muneret et al 2018). Herbicides and other anthropogenic chemicals are slowly being recognized as possible reasons for the vanishing efficiency of ecosystem services and global insect biodiversity decline (Groh et al 2022;Helander et al 2023;Ruuskanen et al 2023). In several plant species, glyphosate residues in soil have elicited substantial changes in phytohormone concentrations, which are key players in mediating plant chemical crosstalk with mutualistic symbiotic microbes and the defence response to herbivorous insects (Robert-Seilaniantz et al 2011;Bastias et al 2017;Fuchs et al 2022a;Mathew et al 2023).…”

Section: Introductionmentioning

confidence: 99%

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Herbicide residues in soil decrease microbe‐mediated plant protection

et al. 2023

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The residues of glyphosate are found to remain in soils longer than previously reported, affecting rhizosphere microbes. This may adversely affect crop and other non‐target plants because the plant's resilience and resistance largely rely on plant‐associated microbes. Ubiquitous glyphosate residues in soil and how they impact mutualistic microbes inhabiting the aboveground plant parts are largely unexplored. We studied the effects of herbicide residues in soil on Epichloë sp., which are common endophytic symbionts inhabiting aerial parts of cool‐season grasses. In this symbiosis, the obligate symbiont subsists entirely on its host plant, and in exchange, it provides alkaloids conferring resistance to herbivores for the host grass that invests little in its own chemical defence. We first show decreased growth of Epichloë endophytes in vitro when directly exposed to two concentrations of glyphosate or glyphosate‐based herbicides. Second, we provide evidence for a reduction of Epichloë‐derived, insect‐toxic loline alkaloids in endophyte‐symbiotic meadow fescue (F. pratensis) plants growing in soil with a glyphosate history. Plants were grown for 2 years in an open field site, and natural herbivore infestation was correlated with the glyphosate‐mediated reduction of loline alkaloid concentrations. Our findings indicate that herbicides residing in soil not only affect rhizosphere microbiota but also aerial plant endophyte functionality, which emphasizes the destructive effects of glyphosate on plant symbiotic microbes, here with cascading effects on plant–pest insect interactions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Herbicide residues in soil decrease microbe‐mediated plant protection

et al. 2023

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“…7 However, this herbicidal and desiccant activity leads to a substantial accumulation of glyphosate residues in the soil and the environment, affecting the soil microbial and plant ecosystems. 8,9 The chelating ability of glyphosate can also enable it to bind with essential fertilizers and minerals supplied to the plants, reducing their biological activity and growth. 10 Owing to its highly polar nature, glyphosate tends to accumulate in water bodies near agricultural fields.…”

Section: ■ Introductionmentioning

confidence: 99%

Ligand Emission-Based Turn-On Sensing of Glyphosate via Competitive Coordination with NH₂-MIL-88B (Fe) MOF Nanocrystals

Adusumalli,

Gupta,

Lee

et al. 2023

ACS Appl. Nano Mater.

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Glyphosate is one of the most effective herbicides and is extensively used in agriculture to improve crop production. However, its toxicity and carcinogenicity stimulate the development of potent, rapid, and highly selective sensors for glyphosate. In this study, we have successfully developed a rational and effective method for detecting glyphosate concentrations in the nanomolar range through luminescence enhancement. For this purpose, we synthesized NH2-MIL-88B (Fe) (MIL = Material Institute Lavoisier) metal–organic framework (MOF)-based nanocrystals (NCs) using the hydrothermal method and applied it for glyphosate detection in an aqueous medium. The MOF NCs contain coordinative ligands (2-aminoterephthalic acid) and metal clusters. The Fe clusters act as luminescence quenchers, suppressing emission from the MOF due to photoinduced electron transfer (PET) from the ligand to Fe3+ ions. The phosphate group of glyphosate competes with the carboxylate of the ligand in the MOF. As a result, the coordination between ligand molecules and Fe metal clusters in the MOF weakens, causing the ligand molecules to separate from the Fe cluster. This process diminishes the PET and regenerates the ligand emission at 450 nm. The luminescence enhancement exhibits high selectivity toward glyphosate and shows minimal interference from various pesticides and metal ions. The limit of detection was calculated as 198 nM, and the performance of the detection probe was evaluated in drinking water. Finally, MOF NCs-coated circular paper strips were prepared and successfully applied to detect glyphosate at femtomolar concentrations.

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“…Concentrations of pesticide residues in soil under conventional agriculture are ubiquitous, but residues are also found in organic agricultural management soils and may be introduced via animal manure fertilizer (Fuchs, Saikkonen, et al, 2022; Muola et al, 2021; Riedo et al, 2021). Glyphosate residues accumulate in agricultural soils worldwide (Maggi et al, 2020), but it remains to be fully elucidated how their antimicrobial properties affect soil microbes and what their critical role is in plant resilience and ecosystem functions (Fuchs et al, 2021; Ruuskanen et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

“…Here, we tested whether long-term (8-year) soil treatment with GBHs affects meadow fescue biomass (root and shoot), regrowth, and chlorophyll content under three different cutting practices and whether the effects can be explained by a lack of soil microbes. As suggested in several studies, glyphosate is an antimicrobial agent which is likely to alter the soil and rhizosphere microbiome (reviewed in Ruuskanen et al, 2023). Consequently, our study looks into plant responses to the effect of long-term, field realistic GBH application as a treatment, which includes potential indirect GBH-mediated changes in soil microbiome and soil biogeochemistry.…”

mentioning

confidence: 99%

Management practice and soil properties affect plant productivity and root biomass in endophyte‐symbiotic and endophyte‐free meadow fescue grasses

Keronen

Helander

Saikkonen

et al. 2022

J of Sust Agri & Env

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Introduction: Pesticides are increasingly used in intensely managed agro-environments, with an increasingly acknowledged impact on crop production, root establishment and plant resilience. At the same time management practices are intensified with the goal to maximize productivity. Materials and Methods:In a greenhouse, we studied the effects of three mowing regimes (uncut, and cutting 5 or 15 cm) employed three times during the season on root and shoot biomass and chlorophyll content of the cool-season grass Festuca pratensis (meadow fescue) growing in soil with a history of glyphosate-based herbicide (GBH) use, the corresponding control soil, and sterilized control soil. Half of the plants hosted a systemic and vertically transmitted fungal endophyte, Epichloë uncinata, which is known to promote host grass growth.Results: Endophyte symbiosis did not affect any tested plant parameters. Cutting the plants to 5 cm decreased both root and cumulative shoot biomass. Herbicide soil history, together with intense cutting (5 cm), caused a decrease in shoot biomass and lowered the chlorophyll content. Surprisingly, soil sterilization boosted shoot biomass and chlorophyll concentrations during less intense cutting (15 cm) and noncutting when compared to the control soil. Root biomass reduced in uncut plants when growing in soil with a history of glyphosate use. Conclusion:Our results indicate that GBH residues in the soil can diminish shoot biomass when grass is frequently cut. Decreased root biomass caused by soil glyphosate history goes together with a reduction of carbon allocation belowground, which decreases grassland resilience to climate warming, increasingly occurring droughts and extreme weather events.

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Ecosystem consequences of herbicides: the role of microbiome

Cited by 77 publications

References 80 publications

Herbicide residues in soil decrease microbe‐mediated plant protection

Herbicide residues in soil decrease microbe‐mediated plant protection

Ligand Emission-Based Turn-On Sensing of Glyphosate via Competitive Coordination with NH₂-MIL-88B (Fe) MOF Nanocrystals

Management practice and soil properties affect plant productivity and root biomass in endophyte‐symbiotic and endophyte‐free meadow fescue grasses

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Ecosystem consequences of herbicides: the role of microbiome

Cited by 77 publications

References 80 publications

Herbicide residues in soil decrease microbe‐mediated plant protection

Herbicide residues in soil decrease microbe‐mediated plant protection

Ligand Emission-Based Turn-On Sensing of Glyphosate via Competitive Coordination with NH2-MIL-88B (Fe) MOF Nanocrystals

Management practice and soil properties affect plant productivity and root biomass in endophyte‐symbiotic and endophyte‐free meadow fescue grasses

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Product

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Ligand Emission-Based Turn-On Sensing of Glyphosate via Competitive Coordination with NH₂-MIL-88B (Fe) MOF Nanocrystals