Calcium Mitigates Arsenic Toxicity in Rice Seedlings by Reducing Arsenic Uptake and Modulating the Antioxidant Defense and Glyoxalase Systems and Stress Markers
Table 2
Chlorophyll a, chl b, chl (a + b), MDA content, and H2O2 content in rice seedlings treated with Ca under As stress. Here, Ca, As0.5, and As1 indicate 10 mM CaCl2, 0.5 mM Na2HAsO4, and 1 mM Na2HAsO4, respectively.
Treatments
chl a (mg g−1 FW)
chl b (mg g−1 FW)
chl (a + b) (mg g−1 FW)
MDA content (nmol g−1 FW)
H2O2 content (nmol g−1 FW)
Control
0.984 ± 0.004 A
0.497 ± 0.019 A
1.480 ± 0.017 A
18.49 ± 0.71 E
27.66 ± 0.49 D
Ca
0.971 ± 0.013 A
0.488 ± 0.008 A
1.459 ± 0.014 A
20.13 ± 1.76 E
29.41 ± 1.45 D
As0.5
0.671 ± 0.022 D
0.328 ± 0.008 D
0.998 ± 0.031 D
30.69 ± 0.53 C
45.55 ± 0.55 B
As0.5 + Ca
0.834 ± 0.009 B
0.410 ± 0.012 B
1.244 ± 0.021 B
23.57 ± 0.69 D
37.08 ± 0.51 C
As1
0.560 ± 0.032 E
0.265 ± 0.008 E
0.825 ± 0.024 E
51.07 ± 2.66 A
52.13 ± 1.94 A
As1 + Ca
0.735 ± 0.011 C
0.376 ± 0.009 C
1.111 ± 0.016 C
37.26 ± 1.44 B
43.67 ± 1.04 B
Means (±SD) were calculated from three replications for each treatment. Bars with different letters are significantly different at applying Fisher’s LSD test.