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AgriGate

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Mechanisms of Soil Restructuring by Bacterial Aggregates: towards a more efficie...

Mechanisms of Soil Restructuring by Bacterial Aggregates: towards a more efficient and resilient Agriculture Soil bacteria are of critical importance to soil health. Soil pore-size distribution over multiple length scales, which facilitates nutrient transport, depends on the presence of soil aggregates, cohesive organo-mineral assemblies... ver más

30/04/2027

UNIVREN

196K€

Presupuesto del proyecto: 196K€

Líder del proyecto

UNIVERSITE DE RENNES No se ha especificado una descripción o un objeto social para esta compañía.

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2024-05-15

HORIZON-MSCA-2023-PF-01-01: MSCA Postdoctoral Fellowships 2023 ExpectedOutcome:Project results are expected to contribute to the following outcomes:

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UNIVREN

195.91K€ | Lider

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Duración del proyecto: 35 meses Fecha Inicio: 2024-05-15
Fecha Fin: 2027-04-30

Líder del proyecto

UNIVERSITE DE RENNES No se ha especificado una descripción o un objeto social para esta compañía.

Presupuesto del proyecto 196K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Soil bacteria are of critical importance to soil health. Soil pore-size distribution over multiple length scales, which facilitates nutrient transport, depends on the presence of soil aggregates, cohesive organo-mineral assemblies formed by bacterial activity. Aggregates support plant health and increase soil stability. Although restoring aggregate structure in degraded soil can yield great benefits for extreme-weather resilience and agricultural productivity, we lack any mechanistic understanding of how aggregates are formed by bacteria. This knowledge gap hampers the deployment of promising bio-augmentation strategies for soil restoration, such as inoculation of soil with aggregate-promoting bacteria. The objective of AgriGate is to narrow this gap by elucidating the biophysical mechanisms of bacterial aggregate-formation. I will focus on the reciprocal mechanical interactions between bacteria and soil grains, using interdisciplinary methods over multiple spatial scales. I will first develop a novel microfluidic chip granting real-time optical access to bacterial dynamics inside a three-dimensional bed of model soil grains. AgriGate’s hypotheses are that (1) there exists an optimal grain size and inoculant richness for bacteria-led aggregation, and (2) that bacterial extracellular polymeric substances (EPS) are necessary for aggregation. I will test these hypotheses by varying grain size, inoculant richness, and bacterial EPS-production in the chip. Microfluidic experiments will be combined with experiments in bacteria-loaded soil columns observed by X-ray tomography, to extend results to the macroscopic scale and link microscale structure to macroscale function. The search for optimal aggregation conditions will be formalized mechanistically and extended by a numerical model of bacterial colony growth in a cohesive granular medium. Together, AgriGate’s new tools and results will provide a strong basis for fundamental and applied studies on soil bio-augmentation.

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