Action spectrum germination

Figure 3. The effect of wavelength on the germination of lettuce seeds which were initially irradiated to establish 50% germination. Additional red light (600-700 nm) further promotes germination most efficiently, whereas far-red light (700-750 nm) inhibits germination. (Action spectrum after Flint and Alister [15].)...

Sugai, M. and Furuya, M., Action spectrum in UV and blue light region for the inhibition of red-light-induced spore germination in Adiantum capillus-veneris. Plant Cell Physiol, 26, 953, 1985. 

Towill, L.R. and Ikuma, H., Rhoto control of the germination of Onoclea spores. Part 1. Action spectrum. Plant Physiol, 51, 973, 1973. 

Gwynn, D. and Scheibe, J., An action spectrum in the blue for inhibition of germination of lettuce seed, Planta, 106, 247,1972. 

---