Wireless, energy-autonomous chlorophyll fluorescence (ChlF) measurement in tree canopies using flexible, multifunctional and highly integrated microsensor probes (B01)

• Subject Area: Ecology and Biodiversity of Plants and Ecosystems ; Microsystems
• Term: since 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 459819582

B1.1 Spatio-temporal heterogeneity of leaf chlorophyll fluorescenceWe will capture the spatio-temporal heterogeneity in leaf-level chlorophyll fluorescence (ChlF), a sensitive tool of photosynthetic efficiency and plant stress. Together with microclimatic measurements we will record a novel dimension of a spatial network within and among tree canopies, to efficiently identify hot spots and hot moments of stress-induced changes of photosynthetic efficiency.B1.2 Minimally Invasive and Energy-Aware Multifunctional Leaf Sensors We will develop novel wireless, energy-autonomous ChlF sensors, using flexible, multifunctional (micro¬climate), and highly integrated microsensor probes. The new leaf sensor (<1cm²) will have the highest degree of miniaturization, to ensure the least interference with leaves. These sensors will act as independent sensor nodes, due to solar energy harvesting enabling them to communicate their data wirelessly, and can be installed at in a deploy-and-forget strategy.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1537: ECOSENSE – Multiscale quantification of spatio-temporal dynamics of ecosys-tem processes by smart autonomous sensor networks
• Applicant Institution: Albert-Ludwigs-Universität Freiburg
• Project Heads: Dr.-Ing. Laura Maria Comella; Professor Dr. Stefan J. Rupitsch; Professorin Dr. Christiane Werner