Table 2.
Impacts of salinity stress on leaf chlorophyll contents in four selected genotypes of A. lividus leafy vegetable.
| Treatment | Chlorophyll a (μg·g−1) | Chlorophyll b (μg·g−1) |
Chlorophyll a/b | Total Chlorophyll (μg·g−1) |
|---|---|---|---|---|
| Variety × Salinity stress | ||||
| Green tower × Control | 442.22 ± 0.16 c | 236.30 ± 0.13 b | 1.87 ± 0.02 e | 676.03 ± 0.33 b |
| Green tower × MSS | 342.95 ± 0.15 d | 208.11 ± 0.16 c | 1.65 ± 0.04 i | 548.65 ± 0.37 d |
| Green tower × SSS | 318.42 ± 0.12 g | 149.93 ± 0. 12 i | 2.12 ± 0.03 c | 471.18 ± 0.38 h |
| Green tower × VSSS | 316.68 ± 0.13 g | 136.02 ± 0.14 j | 2.33 ± 0.03 b | 453.41 ± 0.35 i |
| SA3 × Control | 456.13 ± 0.12 b | 189.36 ± 0.14 d | 2.41 ± 0.04 a | 646.21 ± 0.35 c |
| SA3 × MSS | 323.31 ± 0.14 f | 186.51 ± 0.13 e | 1.73 ± 0.03 h | 511.47 ± 0.34 f |
| SA3 × SSS | 202.67 ± 0.13 l | 95.06 ± 0.12 l | 2.13 ± 0.02 c | 298.34 ± 0.36 m |
| SA3 × VSSS | NS | NS | NS | NS |
| Red tower × Control | 338.15 ± 0.16 e | 185.54 ± 0.11 e | 1.82 ± 0.04 f | 523.47 ± 0.36 e |
| Red tower × MSS | 308.67 ± 0.13 h | 168.35 ± 0.13 g | 1.83 ± 0.02 f | 477.28 ± 0.34 g |
| Red tower × SSS | 241.14 ± 0.15 j | 147.71 ± 14 i | 1.63 ± 0.03 i,j | 388.14 ± 0.35 k |
| Red tower × VSSS | NS | NS | NS | NS |
| SA6 × Control | 518.10 ± 0.12 a | 323.91 ± 0.15 a | 1.61 ± 0.02 k | 843.43 ± 0.34 a |
| SA6 × MSS | 340.92 ± 0.12 d | 172.86 ± 0.17 f | 1.97 ± 0.03 d | 512.90 ± 0.34 f |
| SA6 × SSS | 287.23 ± 0.16 i | 152.62 ± 0.12 h | 1.88 ± 0.03 e | 438.01 ± 0.33 j |
| SA6 × VSSS | 238.29 ± 0.15 k | 111.01 ± 0.15 k | 2.15 ± 0.02 c | 348.86 ± 0.36 l |
| Variety | ||||
| Green tower | 355.07 ± 0.14 a | 182.59 ± 0.13 b | 1.94 ± 0.04 b | 537.32 ± 0.32 a |
| SA3 | 245.53 ± 0.13 c | 117.73 ± 0.14 d | 2.09 ± 0.02 a | 364.00 ± 0.31 c |
| Red tower | 221.99 ± 0.14 d | 125.40 ± 0.14 c | 1.77 ± 0.03 d | 347.22 ± 0.38 d |
| SA6 | 346.14 ± 0.17 b | 190.10 ± 0.14 a | 1.82 ± 0.05 c | 535.80 ± 0.33 b |
| Salinity stress | ||||
| Control | 438.65 ± 0.16 a | 233.78 ± 0.11 a | 1.88 ± 0.02 c | 672.29 ± 0.37 a |
| MSS | 328.97 ± 0.13 b | 183.96 ± 0.15 b | 1.79 ± 0.02 d | 512.57 ± 0.38 b |
| SSS | 262.37 ± 0.14 c | 136.33 ± 0.17 c | 1.92 ± 0.03 b | 398.92 ± 0.34 c |
| VSSS | 138.74 ± 0. 14 d | 61.76 ± 0.16 d | 2.25 ± 0.04 a | 200.57 ± 0.36 d |
| Significance | ||||
| Variety | * | * | * | * |
| Salinity stress | * | * | * | * |
| Variety × Salinity stress | * | * | * | * |
Control (no saline water); MSS = medium salinity stress (50 mM NaCl); SSS = severe salinity stress (100 mM NaCl); VSSS = very severe salinity stress (150 mM NaCl); NS = no survival; different letters in column differed significantly by Tukey’s W test (*, 5% level of significance), (n = 5).