According to the model, temperature (X1), pressure (X2), and the quadratic term of temperature (X12) have positive influences on the yields of lycopene, among which temperature showed the most significant effect (P < 0.05). However, the interaction between temperature and pressure (X1X2) did not have a significant effect on the lycopene yield in our study (P > 0.05). As can be seen in Eq. (1) and Fig. 2A, increases in lycopene yield could be achieved by raising both the temperature and pressure. As expected, the temperature dependence of the lycopene yield was higher than was the pressure dependence.