Fig. 2. Some representative images from the experiment. A: seeds after 7 days; B: seeds’ roots after 10 days; C: drawings of seeds after 10 days; D: seeds removed from their initial location and set under 2 ìW/m2. Each time, for each image: a = seeds kept under 70 – 100 ìW/m2, and b: seeds kept under 2 – 3 ìW/m2.