Table 6.
Effect of PGPR treatment on the antioxidant enzyme activities and metabolites in the mungbean plants grown under salt stress
| Treatments | MDA (nmol/gdw) | H2O2 (µmol/gdw) | SOD (µmol/gdw) | CAT (µmol/min/gdw) | APO (µmol/min/gdw) | GR (mmol/min/mg dw) | ASC (nmol/gdw) | GSH (µmol/gdw) |
|---|---|---|---|---|---|---|---|---|
| Control (no salt) | 12.8 ± 1.8ab | 1.5 ± 0.2ab | 12.7 ± 1.8a | 2.2 ± 0.4a | 3.1 ± 0.5a | 4.3 ± 0.4ab | 134.5 ± 6.3ab | 34.6 ± 2.7ab |
| Control (5 dS/m) | 24.7 ± 2.1d | 3.2 ± 0.2bc | 20.3 ± 1.6bc | 3.8 ± 0.6bc | 4.6 ± 0.5c | 5.8 ± 0.4c | 287.4 ± 5.3f | 58.2 ± 3.1e |
| Control (10 dS/m) | 55.3 ± 2.2h | 6.9 ± 0.7d | 25.3 ± 2.1d | 4.9 ± 0.5c | 5.9 ± 0.4d | 6.6 ± 0.4d | 210.5 ± 6.3c | 43.1 ± 3.3c |
| P. dispersa (5 dS/m) | 27.3 ± 2.1d | 2.6 ± 0.4b | 18.4 ± 1.8bc | 3.1 ± 0.4b | 4.1 ± 0.5bc | 5.1 ± 0.4b | 234.3 ± 6.9d | 63.5 ± 3.6ef |
| E. faecium (5 dS/m) | 19.2 ± 1.7c | 2.4 ± 0.8ab | 17.5 ± 1.8b | 2.9 ± 0.4ab | 4.4 ± 0.4c | 4.8 ± 0.4b | 294.3 ± 6.8f | 61.3 ± 4.6ef |
| P. dispersa + E. faecium (5 dS/m) | 15.2 ± 1.8b | 2.1 ± 0.7ab | 15.3 ± 1.6ab | 2.6 ± 0.4ab | 3.8 ± 0.4b | 4.3 ± 0.5ab | 310.2 ± 6.9g | 64.2 ± 3.2f |
| P. dispersa (10 dS/m) | 47.3 ± 2.4g | 5.1 ± 0.8c | 22.1 ± 1.7c | 4.1 ± 0.2c | 4.9 ± 0.4c | 5.9 ± 0.5c | 254.1 ± 7.3e | 51.2 ± 4.4d |
| E. faecium (10 dS/m) | 43.2 ± 2.6f | 4.2 ± 0.7c | 20.5 ± 2.2c | 3.8 ± 0.3bc | 4.3 ± 0.4bc | 5.1 ± 0.5b | 286.4 ± 8.1f | 54.3 ± 3.8de |
| P. dispersa + E. faecium (10 dS/m) | 33.7 ± 2.6e | 4.1 ± 0.6c | 19.5 ± 1.7bc | 3.4 ± 0.5bc | 3.1 ± 0.4a | 5.3 ± 0.4bc | 234.2 ± 5.8d | 56.2 ± 3.7de |
| P. dispersa (no salt) | 15.3 ± 1.8b | 1.8 ± 0.4ab | 13.3 ± 1.3a | 2.5 ± 0.3ab | 3.4 ± 0.5ab | 4.7 ± 0.4b | 141.6 ± 7.1b | 29.4 ± 3.8a |
| E. faecium (no salt) | 14.1 ± 1.6ab | 1.6 ± 0.7ab | 14.2 ± 1.6a | 2.6 ± 0.3ab | 3.8 ± 0.5b | 4.1 ± 0.4ab | 129.2 ± 7.7a | 31.4 ± 3.1ab |
| P. dispersa + E. faecium (no salt) | 11.9 ± 1.5a | 1.3 ± 0.1a | 14.3 ± 1.6a | 2.3 ± 0.4ab | 2.9 ± 0.3a | 4.0 ± 0.4a | 140.2 ± 7.2ab | 36.2 ± 3.4b |
| LSD (P < 0.05) | 3.2 | 1.1 | 2.8 | 0.86 | 0.57 | 0.62 | 11.3 | 5.8 |
Values represent mean of triplicate treatments. Means sharing same alphabets represents statistically non-significant according to ANOVA analysis. MDA malondialdehyde, H 2 O 2 hydrogen peroxide, SOD superoxide dismutase, CAT catalase, APO ascorbate peroxidase, GR glutathione reductase, ASC ascorbic acid, GSH reduced glutathione