Plant physiological link between drought stress and SIF emission Drought stress is the combined effect of high VPD and low soil water potential Stomata are closed, reducing sub stomatal CO2 concentrations Drought stress slows down Calvin cycle but drought stress as such does not reduce light absorption Fluorescence and NPQ provide alternative electron sinks Research questions 1. How does the SIF signal react to drought stress at different time horizons and stress levels? 2. How is the SIF emission related to plant processes? 3. Can we improve the estimations of transpiration and photosynthesis rates of crops under stress conditions by assimilating SIF observations into plant growth models?
De Canniere, S., Herbst, M., Rascher, U., Vereecken, H., Defourny, P., & Jonard, F. (2019). Field-scale monitoring of drought stress using chlorophyll fluorescence with the coupled SCOPE-AgroC model. International Network on Remote Sensing of Terrestrial And Aquatic Fluorescence, Davos, Switzerland. https://hdl.handle.net/2078.5/57854