Effect of La3+ on the activities of antioxidant enzymes in wheat seedlings under lead stress in solution culture.
In order to improve the plant ability to resist lead stress, effect of 0.05 mg/l La(NO3)3 on the activities of catalase (CAT), superoxide dismutase (SOD), the level of malondialdehyde (MDA) in wheat seedlings under lead stress was studied. The effect of La3+ on plant growth, chlorophyll content in wheat seedlings after adding 0, 50, 100 mg/l Pb(NO3)3 to the nutrient solution for 12 days was observed. The plants were grown in nutrient solution in a strictly controlled climate growth room. Effects of La3+ (with La treatment) compared with check groups was evidently observed. The activities of SOD and CAT in root were enhanced 0.45-1.69 times and 33.20-77.77% respectively and MDA content was reduced 11.05-27.49% in root after treatments from the second day till the end of the experiment. The activities of SOD and CAT was found to be increased slightly (P < 0.05) and MDA content decreased in shoot and root of wheat seedlings by La3+ under lead stress within five days after treatments compared with Pbl and Pb2 groups. It was assumed that antioxidant enzymes was found to be increased by La(NO3)3, the antioxidant potential of the wheat seedlings to resist lead stress enhanced. It is suggested that La3+ could be used to resist lead stress at the beginning under stress while the stress was not so serious.
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing.
X
X
Pang
D H
DH
Wang
X Y
XY
Xing
A
A
Peng
F S
FS
Zhang
C J
CJ
Li
D002374:Catalase / Q000494:pharmacology*; D007477:Ions; D007811:Lanthanum / Q000494:pharmacology*; D007854:Lead / Q000009:adverse effects*; D008315:Malondialdehyde / Q000032:analysis* / Q000378:metabolism; D036226:Seedlings / Q000201:enzymology; D013482:Superoxide Dismutase / Q000494:pharmacology*; D014908:Triticum / Q000201:enzymology*
D007477:Ions; D007854:Lead; D008315:Malondialdehyde; D007811:Lanthanum; D002374:Catalase; D013482:Superoxide Dismutase