Reactive oxygen species and antioxidant enzymes activity of Anabaena sp. PCC 7120 (Cyanobacterium) under simulated microgravity.
It was found that reactive oxygen species in Anabaena cells increased under simulated microgravity provided by clinostat. Activities of intracellular antioxidant enzymes, such as superoxide dismutase, catalase were higher than those in the controlled samples during the 7 days' experiment. However, the contents of glutathione [correction of gluathione], an intracellular antioxidant, decreased in comparison with the controlled samples. The results suggested that microgravity provided by clinostat might break the oxidative/antioxidative balance. It indicated a protective mechanism in algal cells, that the total antioxidant system activity increased, which might play an important role for algal cells to adapt the environmental stress of microgravity.
Li
Gen-bao
GB
Institute of Hydrobiology, Chinese Academy of Sciences, Luojiashan, Wuhan, China.
Liu
Yong-ding
YD
Wang
Gao-hong
GH
Song
Li-rong
LR
D017033:Anabaena / Q000166:cytology / Q000201:enzymology* / Q000378:metabolism; D000975:Antioxidants / Q000378:metabolism; D002374:Catalase / Q000378:metabolism*; D005978:Glutathione / Q000378:metabolism*; D006112:Gravitation; D017382:Reactive Oxygen Species / Q000378:metabolism*; D012399:Rotation; D013482:Superoxide Dismutase / Q000378:metabolism*; D018474:Weightlessness Simulation
D000975:Antioxidants; D017382:Reactive Oxygen Species; D002374:Catalase; D013482:Superoxide Dismutase; D005978:Glutathione