Table 4. Variations in photosynthetic activities and water use efficiency in sweet pepper as influenced by foliar application of salicylic acid under salinity stress (n = 3).
Values in column sharing same superscript letter(s) do not differ at p = 0.05 according to LSD test.
| SA rate(mM) | AN (µmol m−2s−1) | Gs (mol m−2s−1) | E (mmol m−1s−1) | PWUE (µmol mmol−1) |
|---|---|---|---|---|
| 0 | 11.84 ± 0.44d | 0.377 ± 0.05a | 3.98 ± 0.02a | 2.97 ± 0.10d |
| 0.05 | 12.30 ± 052d | 0.323 ± 0.04ab | 3.57 ± 0.02b | 3.44 ± 0.13c |
| 0.1 | 13.59 ± 0.22bc | 0.290 ± 0.04ac | 3.36 ± 0.02c | 4.04 ± 0.05b |
| 0.2 | 13.91 ± 0.24ab | 0.283 ± 0.01ac | 3.28 ± 0.02cd | 4.24 ± 0.05b |
| 0.3 | 15.09 ± 0.17a | 0.250 ± 0.04bc | 3.23 ± 0.02d | 4.67 ± 0.03a |
| 0.4 | 12.59 ± 0.25cd | 0.233 ± 0.02bc | 3.12 ± 0.01e | 4.04 ± 0.10b |
| 0.5 | 11.99 ± 0.40d | 0.217 ± 0.01bc | 3.05 ± 0.01e | 3.93 ± 0.13b |
| 0.6 | 9.58 ± 0.19e | 0.187 ± 0.01c | 2.91 ± 0.07f | 3.30 ± 0.14cd |
Notes.
- AN
- Net photosynthetic rate
- Gs
- Stomatal conductance
- E
- transpiration
- PWUE
- Photosynthetic water use efficiency