TABLE 3.

Effect of temperature amplitude (3 or 10°C) on leaf area and specific leaf area of young tomato plants at day 20.

Temperature amplitude (°C)	Leaf area (cm2)	Specific leaf area (cm2 g–1)
3	1,899 a	303 a
10	1,558 b	256 b
Constant	1,593 b	269 b
F-probability main effect (Amplitude)	<0.001	0.005
Standard error of the means (SEM)	80.4	13.86
LSD (P = 0.05)	142	28

In a third treatment (Constant) average daily temperature and light intensity were constantly maintained. Data are means of three blocks (n = 3) with six replicate plants per block and averaged over Phase and Antiphase and two integration periods (so each value is based on 72 plants). Different letters indicate significant differences between treatments; Fisher’s LSD test, (P = 0.05).