Project description
Roles of bacteria in soil aggregation
Soil bacteria are thought to play a key role in forming organo-mineral aggregates, which support plant health and improve soil stability. Restoring aggregates in damaged soils could improve the function of soils and thereby increase crop resistance to extreme weather and parasites. With the support of the Marie Skłodowska-Curie Actions programme, the AgriGate project aims to acquire a fundamental understanding of how bacteria form aggregates in soil. It will employ model laboratory systems recreating microscopic environments where the interactions between bacteria and soil particles can be closely studied. In particular, the roles of soil-particle size, abundance of bacterial resources, and polymer secretion by bacteria will be investigated. The acquired biophysical knowledge will guide future design of biological remediation methods for soils.
Objective
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.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
This project's classification has been human-validated.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
This project's classification has been human-validated.
- agricultural sciences agriculture, forestry, and fisheries agriculture agronomy plant protection
- natural sciences biological sciences microbiology bacteriology
- engineering and technology environmental biotechnology bioremediation
- natural sciences physical sciences condensed matter physics soft matter physics
- social sciences economics and business economics production economics productivity
Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) HORIZON-MSCA-2023-PF-01
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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.
35042 Rennes
France
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