Table 2.
Effect of different concentrations of Pb (0.25 mM, 0.50 mM, and 0.75 mM), EBL (10–7 M), and SA (1 mM) and their interactions on intercellular CO2 concentration and transpiration rate of 30-, 60-, and 90-day-old plants of B. juncea L. *: P < 0.05, **: P < 0.01.
| Treatment | Cellular CO2 concentration (µmol mol–1) (mean ± SD) | Transpiration rate (mmol m2 s–1) (mean ± SD) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pb | EBL | SA | 30 DAS | 60 DAS | 90 DAS | 30 DAS | 60 DAS | 90 DAS | ||
| 0 | 0 | 0 | 304 ± 2.5 | 444 ± 3.0 | 273 ± 2.0 | 1.18 ± 0.061 | 2.10 ± 0.051 | 3.95 ± 0.132 | ||
| 0 | 10–7 M | 0 | 327 ± 5.8 | 463 ± 2.5 | 294 ± 3.512 | 1.39 ± 0.025 | 2.35 ± 0.035 | 4.44 ± 0.099 | ||
| 0 | 0 | 1 mM | 316 ± 5.6 | 456 ± 4.6 | 290 ± 4.5 | 1.29 ± 0.060 | 2.23 ± 0.085 | 4.17 ± 0.092 | ||
| 0 | 10–7 M | 1 mM | 354± 3.5 | 478 ± 4.0 | 305 ± 4.0 | 1.59 ± 0.035 | 2.58 ± 0.040 | 4.88 ± 0.070 | ||
| 0.25 mM | 0 | 0 | 255 ± 3.5 | 405 ± 3.5 | 246 ± 7.5 | 0.85 ± 0.003 | 1.54 ± 0.042 | 3.27 ± 0.057 | ||
| 0.25 mM | 10–7 M | 0 | 295 ± 4.0 | 426 ± 2.1 | 275 ± 2.5 | 0.88 ± 0.024 | 1.74 ± 0.050 | 3.75 ± 0.04 | ||
| 0.25 mM | 0 | 1 mM | 284 ± 3.5 | 424 ± 3.5 | 265 ± 2.5 | 0.88 ± 0.027 | 1.66 ± 0.114 | 3.68 ± 0.070 | ||
| 0.25 mM | 10–7 M | 1 mM | 305 ± 4.0 | 435 ± 2.1 | 285 ± 3.5 | 0.91 ± 0.004 | 1.84 ± 0.076 | 3.86 ± 0.046 | ||
| 0.50 mM | 0 | 0 | 242 ± 4.0 | 395 ± 5.0 | 225 ± 4.0 | 0.74 ± 0.006 | 0.99 ± 0.009 | 2.91 ± 0.066 | ||
| 0.50 mM | 10–7 M | 0 | 275 ± 3.0 | 415 ± 4.0 | 254 ± 3.1 | 0.80 ± 0.006 | 1.23 ± 0.072 | 3.50 ± 0.207 | ||
| 0.50 mM | 0 | 1 mM | 264± 4.0 | 402 ± 2.1 | 245 ± 3.0 | 0.76 ± 0.009 | 1.18 ± 0.023 | 3.29 ± 0.045 | ||
| 0.50 mM | 10–7 M | 1 mM | 271± 3.1 | 425 ± 3.0 | 272 ± 3.5 | 0.82 ± 0.012 | 1.33 ± 0.060 | 3.77 ± 0.057 | ||
| 0.75 mM | 0 | 0 | 217 ± 1.8 | 354 ± 3.5 | 211 ± 3.5 | 0.49 ± 0.010 | 0.73 ± 0.008 | 1.91 ± 0.091 | ||
| 0.75 mM | 10–7 M | 0 | 247 ± 2.0 | 382 ± 2.1 | 232 ± 2.5 | 0.58 ± 0.017 | 0.88 ± 0.018 | 2.63 ± 0.104 | ||
| 0.75 mM | 0 | 1 mM | 236 ± 5.0 | 378 ± 3.0 | 234 ± 3.5 | 0.55 ± 0.035 | 0.86 ± 0.018 | 2.46 ± 0.123 | ||
| 0.75 mM | 10–7 M | 1 mM | 263 ± 4.0 | 393 ± 7.6 | 284 ± 3.5 | 0.62 ± 0.006 | 1.05 ± 0.046 | 3.45 ± 0.183 | ||
| F-ratio(df 3, 32) treatment | 1017.9** | 991.2** | 396.3** | 1756.9** | 1998.8** | 616.1** | ||||
| F-ratio(df 3, 32) dose | 265.9** | 161.2** | 308.2** | 79.0** | 117.3** | 178.6** | ||||
| F-ratio(df 9, 32) treatment × dose | 8.66** | 2.50* | 16.64** | 18.72** | 3.99** | 14.6** | ||||
| HSD | 11.864 | 11.496 | 11.751 | 0.085 | 0.146 | 0.315 | ||||