Table 2 Tomato plant length (cm) and chlorophyll and carotenoid contents (mg g⁻¹FW) under soil water contents of 75–70% and 55–50% in soils from Hanzhong, Yulin, and Yangling of Shaanxi, China

Soil	Treatments	Plant length (cm)	Chlorophyll a (mg g⁻¹FW)	Chlorophyll b (mg g⁻¹FW)	Chlorophyll a + b (mg g⁻¹FW)	Carotenoid (mg g⁻¹FW)
Hanzhong	Control	93.39±1.57 b	23.25 ± 0.75 a	8.79 ± 0.35 ab	32.04 ± 0.19ab	6.18 ± 0.12 a
	Deficit	65.54 ± 2.14 d	19.88 ± 2.49abc	7.46 ± 0.68 b	27.34 ± 0.11 bcd	3.72 ± 0.08 c
Yulin	Control	97.98 ± 4.24 ab	21.29 ± 1.78 abc	9.82 ± 0.83 a	31.11 ± 0.15 abc	5.62 ± 0.07a
	Deficit	75.15 ± 3.75 c	17.27 ± 1.47 c	7.79 ± 0.18 b	25.09 ± 0.23 d	4.27 ± 0.13Bc
Yangling	Control	103.74 ± 2.63 a	22.89 ± 0.97 ab	10.12 ± 0.24 a	33.03 ± 0.18 a	5.59 ± 0.14 a
	Deficit	81.09 ± 1.72 c	18.14 ± 0.81 bc	7.94 ± 0.12 b	26.08 ± 0.17 cd	4.52 ± 0.09 b
Soil (S)		*	NS	*	NS	NS
Treatment (T)		*	*	*	*	*
Soil x Treatment (SXT)		*	NS	NS	NS	*

Treatment values presented for comparison are the means of three replications (± SE, standard error). Means followed by different letters are significantly different (p ≤ 0.05) according to Tukey’s test.NSnot significant; *P < 0.05