Table 1.

Effect of triacontanol on leaf gas attributes of four cucumber genotypes under normal and salt stress conditions.

Treatments	Green long	Marketmore	Summer green	20252	Green long	Marketmore	Summer green	20252
	Stomatal conductance (μmol m−2 s−1)				Photosynthesis rate (μmol m−2 s−1)
Control	5.25 ± 0.21cd	5.49 ± 0.21bc	5.27 ± 0.19de	5.56 ± 0.29bc	3.57 ± 0.03bc	3.81 ± 0.05bc	3.27 ± 0.23cd	3.72 ± 0.07bc
Salinity (50 mmol L−1)	3.87 ± 0.20fg	4.27 ± 0.13gh	2.66 ± 0.10j	2.90 ± 0.34ij	2.79 ± 0.027def	2.82 ± 0.13de	1.90 ± 0.02g	2.09 ± 0.03ef
Triacontanol spray + non-saline	5.90 ± 0.21ab	6.07 ± 0.22a	5.74 ± 0.18bc	6.13 ± 0.27abc	4.12 ± 0.11ab	4.52 ± 0.18a	3.68 ± 0.10bc	4.22 ± 0.23ab
Triacontanol spray + salinity	4.56 ± 0.22de	4.64 ± 0.12ef	3.65 ± 0.38hi	3.74 ± 0.45gh	3.21 ± 0.11cd	3.28 ± 0.23cd	2.36 ± 0.04efg	2.81 ± 0.24de
	Transpiration rate (mmol H2O m−2 s−1)				Water use efficiency (Pn/E)
Control	2.64 ± 0.02abc	2.78 ± 0.03abc	2.64 ± 0.05abc	2.86 ± 0.01abc	1.65 ± 0.04ab	1.52 ± 0.04ab	1.31 ± 0.04b	1.37 ± 0.05b
Salinity (50 mmol L−1)	2.04 ± 0.12cde	2.04 ± 0.15def	1.59 ± 0.16ef	1.67 ± 0.24f	1.29 ± 0.09b	1.34 ± 0.11ab	0.92 ± 0.12b	0.94 ± 0.20b
Triacontanol spray + non-saline	2.90 ± 0.23abc	3.1 ± 0.29ab	2.86 ± 0.14abc	3.20 ± 0.15a	1.68 ± 0.07a	1.47 ± 0.22ab	1.36 ± 0.05ab	1.22 ± 0.07b
Triacontanol spray + salinity	2.4 ± 0.06bcd	2.49 ± 0.13abcd	2.14 ± 0.12cdef	2.17 ± 0.20cde	1.35 ± 0.02ab	1.29 ± 0.08b	1.09 ± 0.06b	1.20 ± 0.11b

Data represent the means ± SE of four repeats.

Means with different letters are significantly different at P ≤ 0.05 according to Tukey’s HSD test (Salt tolerant, Green long and Marketmore) (Salt sensitive Summer green and 20252).