Table 2. Stem length and dry weight in samples of L. japonicus MG-20 and Gifu B-129 plants.
| MG-20 | Gifu B-129 | |||
| Growth parameter | Control | Alkaline | Control | Alkaline |
| Stem length (cm) | 11.5±0.45 a | 6.17±0.44 b | 9.0±0.27 a | 3.96±0.28 b |
| Root dry weight (g) | 0.092±0.008 a | 0.028±0.008 b | 0.065±0.008 a | 0.057±0.008 a |
| Stem dry weight (g) | 0.032±0.003 a | 0.012±0.003 b | 0.019±0.002 a | 0.008±0.002 b |
| Leaf dry weight (g) | 0.12±0.032 a | 0.032±0.010 b | 0.047±0.004 a | 0.028±0.004 b |
| Total dry weight (g) | 0.24±0.02 a | 0.07±0.02 b | 0.13±0.012 a | 0.093±0.013 b |
| Stem length reduction (%) | 46.38±3.68 b | 56.06±2.42 a | ||
| Total biomass reduction (%) | 70.47±3.85 a | 29.67±8.33 b | ||
Seven-day-old plants were watered with 0.50 Hoagland’s nutrient solution, with or without the addition of 10 mM NaHCO3 during a period of 21 days. Results are the mean of 12 biological replicates ±SE. Statistical differences between control and treatments within each ecotype are shown as P<0.001 (Duncan’s post-hoc test).