Theses and Dissertations

Issuing Body

Mississippi State University


Li, Tongyin

Committee Member

Harkess, Richard L.

Committee Member

Bi, Guihong

Committee Member

Wilson, Jeffery C.

Committee Member

Cox, Michael S.

Date of Degree


Document Type

Graduate Thesis - Open Access



Degree Name

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.

Included in

Horticulture Commons