TABLE 2.
Water status/yield parameters | Treatments | |||||||
Non-stress | Under water-deficit stress | |||||||
Control | 20 mM | 40 mM | 60 mM | Control | 20 mM | 40 mM | 60 mM | |
sodium silicate | sodium silicate | sodium silicate | sodium silicate | sodium silicate | sodium silicate | |||
Water potential (MPa) | 0.540 ± 0.008e | 0.511 ± 0.002f | 0.494 ± 0.002fg | 0.475 ± 0.004g | 0.967 ± 0.017a | 0.875 ± 0.004b | 0.705 ± 0.004c | 0.566 ± 0.004d |
Osmotic potential (MPa) | 1.110 ± 0.002g | 1.114 ± 0.002g | 1.127 ± 0.001f | 1.1338 ± 0.002e | 1.343 ± 0.004a | 1.295 ± 0.003b | 1.218 ± 0.003c | 1.176 ± 0.005d |
Turgor potential (MPa) | 0.570 ± 0.007d | 0.603 ± 0.004c | 0.633 ± 0.001b | 0.664 ± 0.002a | 0.376 ± 0.013g | 0.420 ± 0.006f | 0.513 ± 0.001e | 0.611 ± 0.005c |
Plant biomass (g) | 4.011 ± 0.094e | 5.111 ± 0.075c | 5.833 ± 0.110ab | 5,923 ± 0.019a | 3.560 ± 0.143f | 5.142 ± 0.048c | 4.564 ± 0,030d | 5.504 ± 0.171b |
100-grain weight (g) | 2.962 ± 0.028b | 3.764 ± 0.104a | 3.419 ± 0.084ab | 3.286 ± 0.054ab | 2.223 ± 0.096c | 3.387 ± 0.106ab | 2.819 ± 0.104bc | 2.869 ± 0.104bc |
Yield/plant (g) | 1.217 ± 0.022ef | 2.415 ± 0.068b | 2.654 ± 0.098a | 2.693 ± 0.033a | 1.097 ± 0.023f | 1.352 ± 0.003de | 1.417 ± 0.011d | 1.898 ± 0.089c |
Mean values of three replicates are presented. Within a column, means sharing the same letters are non-significantly different (p > 0.05 and p > 0.01) according to Tukey’s HSD test.