Table 1.
Data for plant growth rate, key metabolites, relative water content and osmotic potential
| A | ||||
|---|---|---|---|---|
| Sampling times | Sensitive (mg day -1 ) | Tolerant (mg day -1 ) | P | |
| DW0 | 33 (22-47) | 45 (37-54) | P = 0.119 | |
| DW1 | 147 (107-204) | 286 (239-342) | ||
| DW2 | 80 (58-109) | 336 (269-421) | ||
| DW3 | 181 (134-244) | 369 (302-450) | ||
| B | ||||
| Source of variation | df | MS | P | |
| Pool | 1 | 1.599 | <0.001 | |
| Covariate | 1 | 0.337 | 0.003 | |
| Residual | 17 | 0.027 | ||
| Subject*Time stratum | ||||
| Time | 2 | 0.196 | <0.001 | |
| Time*Pool | 2 | 0.179 | <0.001 | |
| Residual | 36 | 0.0163 | ||
| Total | 59 | |||
| C | ||||
| Trait | Sensitive | Tolerant | ||
| RWC | Control | 84.2 (81.2-87.2) | 85.9 (81.9-89.9) | |
| Drought | 42.5 (40.0-45.1) | 78.0 (72.5-84.5) | ||
| OP | Control | -1.09 (-1.20-(-0.99)) MPa | -1.14 (-1.20-(-1.09)) MPa | |
| Drought | -3.60 (-4.14-(-3.06)) MPa | -2.44 (-2.86-(-2.03) MPa | ||
| Glucose | Control | 6.94 (5.24-9.19) | 6.01 (4.52-7.98) | |
| Drought | 3.80 (2.60-5.55) | 6.74 (5.39-8.42) | ||
| Fructose | Control | 7.49 (5.72-9.81) | 6.01 (4.57-7.90) | |
| Drought | 4.77 (3.84-5.94) | 9.14 (6.64-12.60) | ||
| myo-Inositol | Control | 3.42 (2.76-4.26) | 3.29 (2.90-3.74) | |
| Drought | 2.46 (2.16-2.82) | 3.28 (2.79-3.86) | ||
| Malate | Control | 14.6 (10.9-19.5) | 17.9 (12.8-24.9) | |
| Drought | 27.6 (20.6-36.9) | 22.2 (20.1-24.5) | ||
| Proline | Control | ND | ND | |
| Drought | 8.51 (6.28-10.74) | 5.00 (2.52-7.48) | ||
| Pinitol | Control | 17.1 (14.0-20.8) | 17.1 (14.3-20.4) | |
| Drought | 120.9 (110.4-132.3) | 109.6 (99.7-120.5) | ||
A: Plant growth rate and 95% confidence intervals (CI) (in brackets) in the sensitive and tolerant pool. DW0 is growth rate at the onset of the drought stress treatment, DW1 is after 16 days, DW2 is at the end of the drought period (~40 days), and DW3 is growth rate 29 days after the end of the drought stress treatment (recovery). B: ANOVA table for the growth rate data (log10 transformed data). The analysis was performed as a repeated measures design with the DW0 (control) as a co-variate. The P value next to the DW0 data indicates the significance value for the co-variate only. C: Mean values and 95% CI for relative water content (RWC) (%), osmotic potential (OP), and 6 metabolites mg (gDW)-1; ND – below detection limit.