过氧化氢酶
谷胱甘肽还原酶
过氧化物酶
超氧化物歧化酶
生物化学
化学
还原酶
酶
抗氧化剂
食品科学
谷胱甘肽过氧化物酶
作者
Hiroko Oidaira,Satoshi Sano,Tomokazu Koshiba,Takashi Ushimaru
标识
DOI:10.1016/s0176-1617(00)80254-0
摘要
Responses of activities of seven antioxidative enzymes after exposure of rice seedlings to low temperature were investigated. The stress caused rapid transient increases in activities of ascorbate peroxidase (EC 1.11.1.11) and guaiacol peroxidase (EC 1.11.1.7) and then slow gradual increases in those of superoxide dismutase (SOD; EC 1.15.1.1), monodehydroascorbate reductase (MDAR; EC 1.6.5.4) and glutathione reductase (EC 1.6.4.2), indicating differential regulations of these enzymes. Activities of catalase (EC 1.11.1.6) and dehydroascorbate reductase (EC 1.8.5.l) were not significantly affected. Protein levels of antioxidative enzymes examined, except for cytosolic MDAR, did not fluctuate significantly by this stress, while the protein level of cytochrome c (respiratory marker) was decreased.
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