Plant growth and morphology can be manipulated with light, that’s no news. But what actually happens to tomato seedlings under varying light quality, e.g. to the transpiration rate and how this then affects plant growth and drought stress tolerance?
Valoya lights with different spectral qualities were used in an experiment, where various morphological and physiological parameters were measured. For example, leaf surface temperature indicates transpiration rate. Picture above shows plants photographed with a thermal camera and crop water-stress index was calculated from the results. Find out about the varying effects of blue, green, yellow, orange and red light from MSc thesis by our Research and Solution Manager Stiina Kotiranta.