Table 3.
Effects of treatments of 5-aminolevulinic acid (ALA) (mg L−1) and lead (Pb) (μM) on chlorophyll and carotenoids contents (mg g−1 FW) in the leaves of Brassica napus cv. ZS 758.
| ALA conc. | Pb conc. | Mean values and their relative increase/decrease over respective controls | |||
|---|---|---|---|---|---|
| Chlorophyll a | Chlorophyll b | Total chlorophyll | Carotenoids | ||
| 0 | 0 | 47.92 ± 2.56a (0) | 58.54 ± 1.64b (0) | 106.47 ± 1.87b (0) | 4.89 ± 0.81ab (0) |
| 100 | 44.45 ± 1.98a (−7.24) | 58.31 ± 1.51b (−0.39) | 102.76 ± 3.50b (−3.74) | 4.87 ± 0.59abc (0) | |
| 400 | 34.20 ± 1.94b (−28.63) | 47.50 ± 1.88d (−18.85) | 81.71 ± 1.11d (−23.25) | 3.54 ± 0.37c (−27.31) | |
|
| |||||
| 25 | 0 | 47.48 ± 2.25a (−0.91) | 64.93 ± 1.76a (+10.91) | 112.42 ± 4.01a (+5.58) | 5.43 ± 0.60a (+11.49) |
| 100 | 45.23 ± 2.35a (+1.75) | 61.40 ± 1.71b (+5.31) | 106.64 ± 4.06b (+3.77) | 4.92 ± 0.48ab (+1.02) | |
| 400 | 37.63 ± 2.27b (+10.02) | 53.73 ± 1.75c (+13.11) | 91.42 ± 2.89c (+11.88) | 3.95 ± 0.42bc (+11.58) | |
Values are the means of four replications ± SD. Variants are significant at P ≤ 0.05.