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Photosynthetic Activity in Low Micro-Algal Density Suspensions

Project description

Advancing aquatic photosynthesis measurement

Photosynthesis is vital for addressing pressing issues such as food security, renewable energy, and climate change. It provides valuable insights into environmental monitoring and offers opportunities for biotechnological advancements and crop improvements. While portable instruments have enabled in-depth measurements of plant photosynthesis in the field, the aquatic world, which is home to a diverse range of photosynthetic organisms, lacks similar capabilities due to the limitations of current spectrometers. This deficiency hinders our understanding of a significant portion of photosynthetic biodiversity. The ERC-funded PALMADS project aims to develop a highly sensitive absorption difference spectrometer to measure photosynthesis in diluted samples of microalgal species, thereby enabling exploration of the diversity of aquatic photosynthesis.

Objective

Photosynthesis is at the intersection of many vexing problems facing humanity, including feeding an ever-increasing population, securing the agricultural economy, replacing fossil fuels with renewable energy, and responding to climate changes. Studying this fundamental process and exploring its functional biodiversity is a crucial necessity. Indeed, photosynthesis is a perfect tool for environmental monitoring in a context of climate changes; it probes in a non-invasive way the physiological state of a photosynthetic organism, its response to the environment. Moreover, the discovery across diversity of new response mechanisms to environmental cues, new metabolic pathways or regulatory mechanisms also constitutes a reservoir for biotechnological mining or crop improvement.
In-depth measurements of plant photosynthesis are now possible in the field with the development of dedicated portable instruments, combining chlorophyll fluorescence and absorption difference spectrometry. However, such approaches do not exist in the aquatic world, where most of the diversity of photosynthetic organisms is yet located, because the sensitivity of absorption difference spectrometers is not sufficient for natural samples characterized by very low concentrations of microalgae. Furthermore, a very small proportion of microalgal species are currently cultivated and of these, very few are “lab rats” reaching high cell concentrations. For all these reasons, a huge part of photosynthetic biodiversity escapes us. In this project, we propose to develop a high sensitivity absorption difference spectrometer which will allow measuring photosynthesis in diluted samples of one or more microalgal species. We believe that the development of such an instrument will constitute a real breakthrough in the study of photosynthesis, allowing to explore the diversity of architectures, pathways and regulations of aquatic photosynthesis.

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Programme(s)

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Topic(s)

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Funding Scheme

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HORIZON-ERC-POC - HORIZON ERC Proof of Concept Grants

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Call for proposal

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(opens in new window) ERC-2023-POC

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Host institution

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
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.

€ 150 000,00
Total cost

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No data

Beneficiaries (1)

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