Table 2.
Growth and morphometric parameters of Baby sun rose (Aptenia cordifolia) plantlets treated with different concentrations of TiO2 NPs (0, 1, 5, 10, 20 mg L−1) for 4 weeks
| Parameters | Treatment | |||||
|---|---|---|---|---|---|---|
| Control | 1 mg L−1 TiO2 | 5 mg L−1 TiO2 | 10 mg L−1 TiO2 | 20 mg L−1 TiO2 | CV (%) | |
| Plant length (cm) | 29.9 ± 0.635a | 23.5 ± 0.981bc | 21.3 ± 1.674 cd | 18.35 ± 1.88d | 27.4 ± 0.230ab | 8.9 |
| Shoot length (cm) | 6.5 ± 0.288a | 6.05 ± 0.375a | 5.95 ± 0.202a | 4.1 ± 0.0577b | 6 ± 0.5773a | 10.50 |
| Root length (cm) | 23.65 ± 0.952a | 18.2 ± 1.039a | 16.5 ± 1.443b | 14.5 ± 0.866c | 22 ± 0.577b | 9.27 |
| Shoot fresh weight (g) | 4.069 ± 0.120a | 4.062 ± 0.114a | 3.282 ± 0.114b | 2.409 ± 0.197c | 3.267 ± 0.1281b | 7.04 |
| Root fresh weight (g) | 0.220 ± 0.003a | 0.114 ± 0.0083a | 0.094 ± 0.0075b | 0.046 ± 0.009c | 0.061 ± 0.0060c | 11.6 |
| Shoot dry weight (g) | 3.930 ± 0.159a | 3.902 ± 0.0678a | 3.220 ± 0.0845b | 2.388 ± 0.185c | 3.213 ± 0.1203b | 6.8 |
| Root dry weight (g) | 0.184 ± 0.006a | 0.065 ± 0.002b | 0.041 ± 0.004c | 0.026 ± 0.0020d | 0.033 ± 0.0029 cd | 9.9 |
| 3rd Leaf area (mm2) | 556.5 ± 11.83b | 628 ± 12.12a | 244 ± 12.12d | 356.5 ± 26.269c | 413.5 ± 30.310c | 7.96 |
| 4th Leaf area (mm2) | 870.5 ± 9.526a | 813.5 ± 10.1036ab | 558 ± 30.022c | 587 ± 51.384c | 728.5 ± 56.86b | 9.08 |
| 3rd Internode length (cm) | 1.35 ± 0.028a | 1.1 ± 0.057b | 1.1 ± 0.115c | 0.9 ± 0.057c | 1.05 ± 0.028ab | 8.41 |
| 4th Internode length (cm) | 1.05 ± 0.0288a | 0.9 ± 0.057b | 0.7 ± 0.057b | 0.6 ± 0.0001b | 0.95 ± 0.028b | 10.36 |
Bars represent the means of three replicates (± SE). Different letters indicated statistically significant difference at p < 0.05