Evaluating UV-B effects and EDU protection in cucumber leaves using fluorescence images and fluorescence emission spectra

1 Climate Stress Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, MD 20705, USA 2 Laboratory for Terrestrial Physics, National Aeronautics and Space Administration, Goddard Space Flight Center, Greenbelt, MD 20771, USA 3 Department of Environmental Analysis and Management, Troy State University, Troy, Al, 36092, USA 4 Current address: Instrumentation and Sensing Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, MD 20705, USA