Plants/treatments | Total chlorophyll content (mg g−1 FW) | Total carotenoid content (mg g−1 FW) | Chlorophyll fluorescence (FV/FM) | Nitrate reductase activity (NO2 g−1 FWh−1) | Carbonic anhydrase activity (CO2 kg−1 FWs−1) |
---|---|---|---|---|---|
M. arvensis | |||||
 Control | 1.44 ± 0.08a | 0.554 ± 0.008a | 0.789 ± 0.008a | 382.67 ± 3.79a | 345.23 ± 3.68a |
 2.5 B | 1.36 ± 0.07b | 0.532 ± 0.006c | 0.762 ± 0.006b | 354.45 ± 2.86b | 305.45 ± 2.81b |
 5 B | 1.37 ± 0.07b | 0.541 ± 0.005b | 0.758 ± 0.006b | 352.34 ± 2.94b | 297.67 ± 2.73b |
 10 B | 1.31 ± 0.06c | 0.518 ± 0.003d | 0.725 ± 0.005c | 322.78 ± 2.76c | 265.45 ± 2.49c |
 20 B | 1.20 ± 0.06d | 0.487 ± 0.002e | 0.698 ± 0.004d | 286.12 ± 2.59d | 233.12 ± 2.22d |
 30 B | 0.91 ± 0.04e | 0.432 ± 0.002f | 0.654 ± 0.004e | 223.43 ± 2.25e | 202.34 ± 2.04e |
C. flexuosus | |||||
 Control | 1.23 ± 0.04a | 0.678 ± 0.008a | 0.796 ± 0.009a | 412.56 ± 4.52a | 294.45 ± 3.32a |
 2.5 B | 1.12 ± 0.04b | 0.643 ± 0.007b | 0.773 ± 0.006b | 389.76 ± 3.77b | 256.34 ± 2.86b |
 5 B | 1.10 ± 0.03b | 0.624 ± 0.007c | 0.768 ± 0.005b | 370.56 ± 3.67c | 245.31 ± 2.27c |
 10 B | 0.97 ± 0.03c | 0.621 ± 0.007c | 0.729 ± 0.003c | 354.70 ± 3.38d | 212.34 ± 2.10d |
 20 B | 0.92 ± 0.03d | 0.576 ± 0.006d | 0.702 ± 0.002d | 315.76 ± 2.90e | 193.23 ± 2.00e |
 30 B | 0.82 ± 0.03e | 0.516 ± 0.006e | 0.663 ± 0.002e | 278.80 ± 2.26f | 165.45 ± 1.86f |