Tomatoes exposed to direct sunlight in the field often develop a poor color, mainly because fruit exposed to high temperatures has low lycopene content (Helyes et al., 2006). Our data show that no significant differences in lycopene contents were observed in tomatoes grown in plastic houses (48.9 _g g−1 f.w.) compared to control, open field conditions (48.1 _g g−1 f.w.).