Fig. 4
Carbohydrate concentration changes during daylight in leaves of 30-d-old S. lycopersicum plants grown from seeds treated with TiO2 particles. (A) glucose, (B) fructose, (C) sucrose, and (D) starch. For each measurement time, different letters indicate significant differences between the treatments using the Tukey test (p ≤ 0.05). Means ± SE, n = 5