Study of the Physiological Dynamics of Cadmium Accumulation in Two Varieties of Rice with Different Cadmium-Accumulating Properties
Table 2
Antioxidant enzymes activity and MDA of two tested rice varieties under Cd pollution treatment at different growth period.
Rice growth period
Soil treatment
YZX
XWX
SOD (U/g)
POD (U/g)
CAT (U/g)
MDA (nmol/mg)
SOD (U/g)
POD (U/g)
CAT (U/g)
MDA (nmol/mg)
Tillering stage
Cd-1
1814.3 ± 23.3a(b)
42.4 ± 5.7a(a)
44.4 ± 9.6a(b)
5.5 ± 0.2a(c)
1825.6 ± 23.2a(c)
47.7 ± 4.3a(a)
64.5 ± 14.6a(c)
5.5 ± 0.2a(d)
Cd-2
2114.3 ± 10.7a(ab)
49.5 ± 4.4b(a)
138.7 ± 9.4 b(b)
4.9 ± 0.8ab(c)
2049.3 ± 16.7 b(c)
57.1 ± 5.0a(a)
160.5 ± 10.7a(b)
4.5 ± 0.5ab(b)
Cd-3
2143.2 ± 11.7 b(c)
60.9 ± 5.7b(a)
162.5 ± 10.4 c(c)
4.3 ± 0.8b(c)
2183.5 ± 11.1c(c)
59.2 ± 4.3b(a)
174.2 ± 11.7b(c)
3.5 ± 0.8b(c)
Booting stage
Cd-1
1822.7 ± 25.2a(a)
33.7 ± 6.1b(a)
46.1 ± 9.6 a(b)
7.8 ± 0.6a(b)
1917.5 ± 17.4a(a)
40.0 ± 5.4a(ab)
76.8 ± 8.5 a(c)
6.6 ± 0.8a(c)
Cd-2
2159.2 ± 13.3b(a)
45.6 ± 5.4b(a)
144.0 ± 8.5b(b)
5.6 ± 0.8b(c)
2177.5 ± 14.6b(a)
46.9 ± 6.6a(b)
158.4 ± 10.9a(b)
4.3 ± 0.1b(b)
Cd-3
2292.4 ± 24.8c(c)
58.2 ± 6.4a(ab)
165.6 ± 9.6 c(c)
4.3 ± 0.4b(c)
2375.8 ± 13.8 c(b)
52.4 ± 8.3a(a)
174.5 ± 13.6b(bc)
3.9 ± 0.4b(c)
Full heading stage
Cd-1
1925.5 ± 20.9a(b)
24.9 ± 5.4a(b)
101.2 ± 9.3a(a)
9.9 ± 0.4a(a)
2039.8 ± 37.8a(b)
30.1 ± 4.9a(b)
109.0 ± 9.4a(a)
8.6 ± 0.1a(b)
Cd-2
2087.4 ± 15.3b(bc)
35.8 ± 4.8ab(b)
259.4 ± 9.5b(a)
7.6 ± 0.8b(b)
2088.4 ± 14.4b(b)
40.3 ± 4.9a(b)
267.6 ± 10.8b(a)
7.8 ± 0.6b(a)
Cd-3
2146.6 ± 18.2 c(a)
41.4 ± 7.9b(b)
339.4 ± 15.4c(a)
7.3 ± 0.4b(b)
2218.3 ± 14.1b(a)
45.0 ± 5.1 b(b)
344.7 ± 7.8c(a)
6.6 ± 0.1c(b)
Maturity stage
Cd-1
1873.3 ± 22.6a(b)
22.9 ± 5.6a(b)
68.9 ± 9.9 a(b)
10.8 ± 0.7a(a)
1881.8 ± 15.8a(d)
26.9 ± 4.5a(b)
87.6 ± 10.7a(b)
10.4 ± 0.5a(a)
Cd-2
2044.5 ± 25.0b(c)
32.5 ± 5.7ab(b)
152.1 ± 9.5a(b)
9.6 ± 0.5ab(a)
2069.6 ± 20.9b(bc)
39.1 ± 4.4a(b)
154.9 ± 8.3b(b)
8.8 ± 0.7b(a)
Cd-3
2122.4 ± 23.2c(b)
38.8 ± 6.8b(b)
160.7 ± 9.3b(b)
8.9 ± 0.6b(a)
2106.9 ± 14.0c(b)
43.6 ± 6.4b(b)
195.9 ± 9.4c(b)
8.0 ± 0.1b(a)
Note. The data in the table are mean ± standard error. The difference between different treatments of soil Cd concentration is shown outside the brackets, and the difference between different growth stages is shown inside brackets. The difference between the two varieties at the 0.05 level, and the difference between the two varieties at 0.01 level. SOD, superoxide dismutase; POD, peroxidase (POD); CAT, catalase (CAT); MDA, malondialdehyde.
