Moreover, high temperature increases respiration rate (Lakso and Seeley, 1978), and consequently decreases net photosynthesis (Heinicke and Childers, 1937). As fruit respiration rate is raised by high night temperature, nutrition stored in the fruit is consumed excessively (Faust, 1989; Haun and Coston, 1983). This is believed to reduce the enlargement of equatorial diameter since the mid period of fruit enlargement.