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Microbial performance impacted by surfactants from glyphosate application

Project description

A potent weed killer may be harming microbes and their ability to help fight climate change

Enhancing the productivity of farms involves controlling pests and weeds. Glyphosate is the most widely used herbicide globally, controlling broadleaf weeds and grasses. Recently, several European countries have voted to ban glyphosate-containing products given its accumulation in the environment and studies showing it is probably carcinogenic to humans. Bioremediation via microbial glyphosate degradation has been employed. Growing evidence suggests glyphosate and the surfactants with which it is commonly sold may be harming microbial communities – and their ability to modulate biogeochemical cycles and greenhouse gas formation. The ERC-funded MICROSURF project will address this and more generally reveal the impacts of surfactants on microorganisms in the environment.

Objective

Glyphosate is the most widely applied herbicide on Earth, exhibits potential toxicity, and persists in the environment, although microbial glyphosate degradation exists. Glyphosate is not used as single compound but as mixture, a formulation, consisting of surfactants as the second most abundant ingredient. These surfactants are considered inert and a critical knowledge gap exists regarding their impacts on microorganisms in the environment. In my seminal postdoctoral studies, we showed that surfactants can inhibit microbial activities and induce a shift in microbial communities and functions in marine settings. I hypothesize that similar effects occur in terrestrial and freshwater environments in response to surfactant-glyphosate application. In particular, I.) glyphosate-degrading microorganisms might be severely affected, probably contributing to glyphosates persistence in nature and II.) microbial key players that drive biogeochemical cycles might be impacted, and, thus, surfactant-glyphosate application might influence greenhouse gas formation and contribute to climate change. To systematically study the effects of surfactants and surfactant-glyphosate mixtures in light of these novel aspects, an innovative multiscale and interdisciplinary frontier research effort is required: starting with pure isolate and enrichment culture studies, followed by microcosm experiments, and advancing to field experiments, in the presence and absence of surfactants respectively, we will identify microbial key players and functions, quantify microbial activities related to glyphosate degradation as well as to biogeochemical cycles and greenhouse gas formation, and, furthermore, reveal common principles of surfactant effects. This pioneering research will holistically unravel the impacts of surfactants on microorganisms in the environment and has the potential to influence politics, society, technology, and science (microbial ecology, biogeochemistry, and Earth sciences).

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HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

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(opens in new window) ERC-2022-STG

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Host institution

UNIVERSITY OF STUTTGART
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 1 499 375,00
Address
KEPLERSTRASSE 7
70174 Stuttgart
Germany

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Region
Baden-Württemberg Stuttgart Stuttgart, Stadtkreis
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 1 499 375,00

Beneficiaries (1)

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