[Effects of cadmium stress on the antioxidative system in Ganoderma lucidum mycelia].
The study on the effects of different concentration (0, 10, 50, 100, 200 and 400 micromol x L(-1)) cadmium (Cd) on the antioxidative system in Ganoderma lucidum mycelia indicated that with increasing concentration of Cd, the fresh mass and the proline, total polysaccharides, and reduced polysaccharides contents of G. lucidum mycelia decreased, but non-protein thiol (NPT) content increased. At 400 micromol x L(-1) of Cd, the NPT content increased dramatically, being 5.7 times higher than control. Within the range of test Cd concentrations, the activities of CAT, GR and POD increased first and decreased then, with the peak at 100 micromol x L(-1) of Cd, while the activities of LOX and SOD increased with increasing Cd concentration, with the maximum at 400 micromol x L(-1) of Cd. Polyacrylamide gel electrophoresis analysis revealed that 100-400 micromol x L(-1) of Cd induced two additional isozymes bands of Mn-SOD, 10-200 micromol x L(-1) of Cd increased the intensity of constitutive isozymes of CAT, POD, SOD and LOX, while 400 micromol x L(-1) of Cd decreased the intensity of isozymes of POD significantly.
Wang
Song-Hua
SH
College of Life Science, Anhui Science and Technology University, Bengbu 233100, Anhui, China. shwang70@yahoo.com.cn
Zhang
Hua
H
Cui
Yuan-Rong
YR
He
Qing-Yuan
QY
Zhang
Qiang
Q
D000975:Antioxidants / Q000378:metabolism*; D002104:Cadmium / Q000633:toxicity*; D004305:Dose-Response Relationship, Drug; D004591:Electrophoresis, Polyacrylamide Gel; D032902:Ganoderma / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D025282:Mycelium / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D010544:Peroxidases / Q000378:metabolism; D013438:Sulfhydryl Compounds / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism
D000975:Antioxidants; D013438:Sulfhydryl Compounds; D002104:Cadmium; D010544:Peroxidases; D013482:Superoxide Dismutase