Table 2.

Effects of paclobutrazol (PBZ) on relative water content (RWC), electrolyte leakage (EL) and proline content in the leaves of Curcuma alismatifolia Gagnep. cv. Chiang Mai Pink during 0–30 days of water being withheld.

	Treatment	Withholding water
		0 day	10 days	20 days	30 days
RWC (%)	Well-watered	88.3 ± 2.2	87.0 ± 3.3ab	87.5 ± 1.7a	87.8 ± 1.7b
	No water	86.2 ± 3.2	80.3 ± 1.4b	75.6 ± 2.9b	68.6 ± 1.6d
	Well-watered + 1500 ppm PBZ	91.2 ± 6.2	91.2 ± 4.5a	90.3 ± 0.7a	92.7 ± 0.8a
	No water + 1500 ppm PBZ	89.5 ± 4.1	83.5 ± 0.8b	75.5 ± 3.5b	71.9 ± 1.5c
F-test		ns	∗	∗	∗
EL (%)	Well-watered	5.8 ± 0.6a	5.6 ± 0.3a	5.6 ± 1.0a	8.3 ± 1.4b
	No water	4.9 ± 0.5b	5.6 ± 0.6a	6.1 ± 0.6a	10.3 ± 1.8a
	Well-watered + 1500 ppm PBZ	4.9 ± 0.6b	4.9 ± 0.4b	4.9 ± 0.2b	6.8 ± 1.0c
	No water + 1500 ppm PBZ	4.1 ± 0.3c	4.6 ± 0.2b	4.8 ± 0.1b	4.1 ± 0.4d
F-test		ns	∗	∗	∗
Proline (μmol/g FW)	Well-watered	0.1 ± 0.00	0.2 ± 0.01	0.2 ± 0.02	0.7 ± 0.06b
	No water	0.1 ± 0.01	0.3 ± 0.14	0.3 ± 0.05	1.1 ± 0.05a
	Well-watered + 1500 ppm PBZ	0.1 ± 0.01	0.2 ± 0.05	0.3 ± 0.05	0.6 ± 0.11b
	No water + 1500 ppm PBZ	0.1 ± 0.01	0.2 ± 0.04	0.3 ± 0.10	0.7 ± 0.07b
F-test		ns	ns	ns	∗

The data are expressed as the means of three replications ± standard deviation (SD). F-test, ns: no significant difference; ^∗: significant difference at p < 0.05. Mean sharing with the different letters in a single column of the same parameter is considered significantly different by the least significance difference (LSD) test.