temperature group, confirming that fruit enlargement is restricted by high temperature after the early period of growth. Temperature is a factor limiting photosynthesis. That is, if temperature exceeds a certain range, it lowers the CO2 fixation rate (Mooney et al., 1978) and impairs the activity of photosystem II (Havaux et al., 1991). This consequently decreases the photosynthetic rate (Fig. 3B), and markedly reduces the accumulation of assimilation products and transfer to fruit