Citrulline Is an Important Biochemical Indicator in Tolerance to Saline and Drought Stresses in Melon

Table 5

Shoot dry weight of melon genotypes exposed to 250 mM NaCl salt and 45 mM PEG (−1.0 MPa) drought stresses (g plant⁻¹).

Treatment	Genotype	38 DAS, 3 days in stress	41 DAS, 6 days in stress	44 DAS, 9 days in stress	47 DAS, 12 days in stress	Mean of treatments
Control	CU 52	1.14 ± 0.2k--p	1.41 ± 0.1e--i	1.44 ± 0.2d--h	1.57 ± 0.1c--f	1.49
	CU 94	1.23 ± 0.3i--o	1.23 ± 0.1i--o	1.59 ± 0.1b--e	1.54 ± 0.2k--p
	CU 196	1.44 ± 0.4^a	1.62 ± 0.5b--d	1.77 ± 0.2a--c	1.89 ± 0.1^a
	CU 280	1.27 ± 0.4g--m	1.44 ± 0.8d--h	1.62 ± 0.1b--d	1.79 ± 0.2^ab
Salt	CU 52	0.91 ± 0.2^qr	1.02 ± 0.7p--r	1.10 ± 0.4l--q	1.10 ± 0.2l--q	1.21
	CU 94	1.03 ± 0.5o--r	1.03 ± 0.2o--r	1.07 ± 0.2m--q	1.11 ± 0.1^ef
	CU 196	1.26 ± 0.5h--n	1.31 ± 0.2g--k	1.46 ± 0.3d--g	1.54 ± 0.2d--f
	CU 280	1.29 ± 0.2g--l	1.29 ± 0.2g--l	1.46 ± 0.2d--g	1.46 ± 0.2d--g
Drought	CU 52	0.98 ± 0.4p--r	0.98 ± 0.3p--r	1.03 ± 0.1o--r	1.14 ± 0.2k--p	1.11
	CU 94	0.85 ± 0.3^r	0.98 ± 0.2p--r	1.09 ± 0.3l--q	1.05 ± 0.3n--q
	CU 196	1.03 ± 0.5p--r	1.31 ± 0.2g--k	1.37 ± 0.2f--j	1.41 ± 0.2e--i
	CU 280	1.09 ± 0.1l--q	1.10 ± 0.3l--q	1.17 ± 0.2j--p	1.31 ± 0.2g--k
Mean of times		1.12	1.22	1.34	1.40
Mean of genotypes		CU 52	CU 94	CU 196	CU 280
		1.14	1.15	1.44	1.35

DAS: days after sowing. Data shown were means of 3 independent plants (replicates). Data in the table bearing the same letter are not significant at 5% probability. Differing genotype responses to salt and drought stresses: CU 52 sensitive, CU 94 sensitive, CU 196 tolerant, and CU 280 moderately tolerant.
Significance of interactions:
∗∗∗Genotype, Treatment, Time, Genotype × Treatment, Genotype × Time, Treatment × Time, Genotype × Treatment × Time.
The a–r letters are showed statistical groups.