Table 5.
The effect of salinity on the main photosynthetic parameters of tolerant and sensitive ecotypes of quinoa using the model of Farquhar et al. (1980).
| Ecotype | NaCl | CONDITION | Jmax | Sig. | Vcmax | Sig. | TPU | Sig. | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| M | μmol CO2 m−2 s−1 | ± SD | p ≤ 0.01 | μmol CO2 m−2 s−1 | ± SD | p ≤ 0.01 | ± SD | p ≤ 0.01 | |||
| Amarilla | 0 | R | 152.66 | 62.62 | d | 32.76 | 6.41 | c | 10.56 | 2.77 | d |
| Amarilla | 0.4 | R | 120.53 | 20.61 | c | 29.75 | 4.57 | bc | 9.27 | 1.49 | cd |
| Amarilla | 0 | nR | 122.52 | 23.61 | c | 33.4 | 9.77 | c | 9.93 | 1.83 | cd |
| Amarilla | 0.4 | nR | 122.59 | 24.82 | c | 29.55 | 5.06 | bc | 9.69 | 1.57 | cd |
| Hueque | 0 | R | 115.15 | 24.66 | c | 27.68 | 4.94 | b | 8.96 | 1.83 | bc |
| Hueque | 0.4 | R | 72.29 | 13.55 | a | 18.86 | 2.72 | a | 5.68 | 1.26 | a |
| Hueque | 0 | nR | 94.66 | 21.29 | b | 25.67 | 6.55 | b | 7.88 | 2.07 | b |
| Hueque | 0.4 | nR | 75.67 | 17.51 | a | 19.26 | 5.62 | a | 6.47 | 1.74 | a |
R: with stomatal restriction; nR without stomatal restriction; Vc,max is: Maximum rate of RubisCO activity; Jmax is the transport of electrons at light saturation and TPU is triose phosphate transport rate. Different letters indicate Significance level (p ≤ 0.01).