Table 2.
Plant growth promotion by Viridibacillus arenosi strain IHB B 7171 in maize and tea under controlled conditions and pea and wheat in field conditions
| Growth parameters | Control | Inoculated | Increase over control (%) |
|---|---|---|---|
| Maize seedlings (controlled environment)a | |||
| Plant height (cm) | 55 | 60 | 9.0 |
| Shoot dry weight (g) | 2.59 | 3.86 | 49.3 |
| Root length (cm) | 13 | 17 | 30.7 |
| Root dry weight (g) | 0.15 | 0.29 | 93.3 |
| Tea (nursery conditions)b | |||
| Plant height (cm) | 21 | 23 | 9.5 |
| Leaves (No.) | 17 | 20 | 17.6 |
| leaf fresh weight (g) | 11 | 17 | 54.5 |
| leaf dry weight (g) | 0.29 | 0.38 | 31.0 |
| Pea (field conditions)c | |||
| Plant height (cm) | 40 | 44.3 | 10.7 |
| Yield (q/ha) | 46 | 52 | 13.0 |
| Fresh weight (q/ha) | 12.4 | 14.5 | 16.9 |
| Dry weight (q/ha) | 8.2 | 9.9 | 20.7 |
| Wheat (field conditions)d | |||
| Plant height (cm) | 91 | 93.6 | 2.8 |
| Yield (q/ha) | 25.8 | 29.4 | 13.9 |
| Fresh weight (q/ha) | 56.18 | 70.01 | 25 |
| Dry weight (q/ha) | 11.0 | 14.07 | 27 |
Values are the mean of three replicates and significantly different from the control at p < 0.05
aTemperature 25 ± 2 °C, R.H. 65–70% and photoperiod 16 h
bAverage minimum and maximum temperatures 15–34 °C and R.H. 45–75%, and overall rainfall 290–1250 mm
cAverage minimum and maximum temperatures 1–27 °C and R.H. 35–94%, and overall rainfall 9.5–153.8 mm
dAverage minimum and maximum temperatures 1–32 °C and R.H. 35–95%, and overall rainfall 95–290 mm