Figure 2
From: Responses of butter leaf lettuce to mixed red and blue light with extended light/dark cycle period
The morphology of lettuce exposed to different L/D cycle treatments of RB. L/D—light/dark. L16/D8—16 h light/8 h dark (as control), L24/D12—24 h light/12 h dark, L48/D24—48 h light/24 h dark, L96/D48—96 h light/48 h dark, L120/D60—120 h light/60 h dark. (The URL link of the software used in the figure is http://adobe.com/cn/products/photoshop.html).
