Table 4 Photosynthetic pigments (μg/g fresh weight) of quinoa treated with proline or trehalose with (+) and without (−) compost amendment under salinity stress (average of two seasons)
Salinity (mg/L) | Treatment, mM | Chlorophyll a | Chlorophyll b | Carotenoids | Total pigments | |||||
|---|---|---|---|---|---|---|---|---|---|---|
− | + | − | + | − | + | − | + | |||
0 | Control | 18.44 | 20.11 | 4.29 | 4.88 | 4.67 | 5.22 | 27.4 | 30.21 | |
Proline | 0.5 | 20.17 | 21.15 | 4.84 | 5.93 | 5.42 | 6.31 | 30.43 | 33.39 | |
1.0 | 21.16 | 22.46 | 5.78 | 6.65 | 6.32 | 7.42 | 33.26 | 36.53 | ||
Trehalose | 2.5 | 20.09 | 21.45 | 5.01 | 5.98 | 7.7 | 8.07 | 32.80 | 35.50 | |
5.0 | 22.12 | 23.89 | 6.57 | 7.16 | 5.87 | 6.38 | 34.56 | 37.43 | ||
3000 | Control | 16.15 | 16.73 | 2.80 | 3.87 | 2.54 | 2.83 | 21.49 | 23.43 | |
Proline | 0.5 | 16.58 | 17.06 | 3.31 | 4.28 | 3.18 | 3.16 | 23.07 | 24.50 | |
1.0 | 17.89 | 18.81 | 3.98 | 4.47 | 3.54 | 3.88 | 25.41 | 27.16 | ||
Trehalose | 2.5 | 17.44 | 18.11 | 3.69 | 4.72 | 4.08 | 4.83 | 25.21 | 27.66 | |
5.0 | 18.15 | 19.95 | 5.11 | 5.78 | 3.96 | 5.17 | 27.22 | 30.90 | ||
6000 | Control | 14.34 | 14.69 | 2.27 | 3.25 | 2.08 | 2.97 | 18.69 | 20.91 | |
Proline | 0.5 | 14.73 | 15.21 | 2.51 | 3.73 | 3.01 | 3.54 | 20.25 | 22.48 | |
1.0 | 15.14 | 15.75 | 2.98 | 4.45 | 3.32 | 4.37 | 21.44 | 24.57 | ||
Trehalose | 2.5 | 15.16 | 15.58 | 2.68 | 3.49 | 3.42 | 4.59 | 21.26 | 23.66 | |
5.0 | 16.02 | 16.75 | 3.43 | 4.68 | 2.85 | 3.96 | 22.3 | 25.39 | ||
LSD 5% | 1.86 | 0.45 | 0.39 | 2.03 | ||||||