Table 2.
Effects of different NaCl concentrations on the OJIP parameters in leaves of sorghum (Sorghum bicolor L. Shamal) and maize (Zea mays L. Kerala).
| Variant | ABS/RC | ETo/RC | REo/RC | φPo | φRo |
|---|---|---|---|---|---|
| Shamal | |||||
| Control 50 mM NaCl 150 mM NaCl 200 mM NaCl 250 mM NaCl |
2.821 ± 0.050 B 2.538 ± 0.047 C 2.452 ± 0.048 C 2.419 ± 0.029 C 4.309 ± 0.165 A |
1.297 ± 0.015 A 1.216 ± 0.013 B 1.249 ± 0.016 A,B 1.098 ± 0.020 C 0.850 ± 0.043 D |
0.657 ± 0.052 A 0.572 ± 0.013 A 0.513 ± 0.014 B 0.413 ± 0.014 C 0.356 ± 0.023 C |
0.791 ± 0.001 A 0.804 ± 0.002 A 0.794 ± 0.003 A 0.802 ± 0.003 A 0.418 ± 0.048 B |
0.233 ± 0.022 A 0.225 ± 0.001 A 0.209 ± 0.004 A 0.171 ± 0.004 B 0.066 ± 0.010 C |
| Kerala | |||||
| Control 50 mM NaCl 150 mM NaCl 200 mM NaCl 250 mM NaCl |
2.569 ± 0.050 b 2.304 ± 0.039 c 2.226 ± 0.073 c 2.507 ± 0.055 b 2.996 ± 0.067 a |
1.204 ± 0. 022 a 1.113 ± 0.018 b 1.051 ± 0.043 b 1.001 ± 0.068 b,c 0.835 ± 0.025 c |
0.507 ± 0.020 a 0.384 ± 0.018 b 0.339 ± 0.037 b,c 0.336 ± 0.060 b,c 0.245 ± 0.043 c |
0.796 ± 0.003 b 0.817 ± 0.004 a 0.809 ± 0.018 a,b 0.752 ± 0.008 c 0.760 ± 0.003 c |
0.197 ± 0.013 a 0.169 ± 0.009 a,b 0.145 ± 0.011 b,c 0.120 ± 0.013 c,d 0.091 ± 0.015 d |
ABS/RC—specific absorption flux per reaction center (RC), i.e., effective antenna size of an active RC; ETo/RC—electron transport flux per RC further QA; REo/RC—electron flux per active RC reducing the end electron acceptors on the acceptor side of PSI (at t = 0); φPo—maximum quantum yield of primary PSII photochemistry (at t = 0); φRo—quantum yield for reduction of end electron acceptors at the PSI acceptor side. Mean values (± SE) were calculated from 8 independent measurements. Different letters indicate significant differences for the respective parameters at p < 0.05 (uppercase for sorghum and lowercase for maize).