Upon having access to the funds, we initiated work in June 2019 and plan to build off of these findings to continue efforts and analysis in 2020-2021. We conducted a dry down experiment on potted grapevines to evaluate the relationship between active and passive (i.e. ground based equivalent of SIF) fluorescence and used this experiment system to test modification to a gas exchange system for comparing active and passive fluorescence while simultaneously measuring gas exchange. We also utilized existing field installations, specifically at the Ripperdan GRAPEX-Grape Remote sensing and Atmospheric Profiling and Evapotranspiration eXperiment site, which contains a variable rate irrigation system where water can be delivered down to 30m by 30m pixels and contains 4 treatments (two stressed and two well-watered) for comparison of active and passive fluorescence responses of grapevines under stress conditions.
/wp-content/uploads/2017/09/AFV-Header-Logo.png 0 0 AVF /wp-content/uploads/2017/09/AFV-Header-Logo.png AVF2020-03-11 16:30:502020-03-11 16:30:50Developing solar-induced chlorophyll fluorescence as a ground-based and remotely-sensed physiological indicator of grapevine stress