Mississippi State University
Harkess, Richard L.
Wilson, Jeffery C.
Cox, Michael S.
Date of Degree
Graduate Thesis - Campus Access Only
Master of Science (M.S.)
College of Agriculture and Life Sciences
Department of Plant and Soil Sciences
The objective of these studies was to observe the effects of LED lighting treatments on physiological parameters of lettuce and microgreens. Four different lighting treatments; 1) Physiospec (white), 2) Red, 3) DR9 (25:75 Blue:Red), and 4) Anthospec (at 20/80 Blue:Red); were used in this experiment. Two experiments were conducted: 1) Examining the effects of LED lights on lettuce yield and photosynthetic activity and 2) The effects of switching lighting regiments halfway through the growth cycle on Kale microgreen yield and color. Physiospec lighting was found to promote the highest yield and photosynthetic activity among the four treatments for lettuce. It was found that changing from Physiospec lighting to Red lighting increased the fresh mass and stem height of kale microgreens. This also made the microgreens a
lighter shade of green.
Blanche, James Travis, "Examining physiological and photosynthetic effect of LED lighting on lettuce and kale microgreens" (2023). Theses and Dissertations. 5829.