Enhancement of antioxidative enzyme activities in chilled rice seedlings

被引：46
作者：
Oidaira, H
Sano, S
Koshiba, T
Ushimaru, T
机构：
[1] Shizuoka Univ, Fac Sci, Dept Biol & Geosci, Shizuoka 4228529, Japan
[2] Kyoto Prefectural Univ, Dept Biol Resource Chem, Fac Agr, Kyoto 6068522, Japan
[3] Tokyo Metropolitan Univ, Dept Biol, Tokyo 1920397, Japan
来源：
JOURNAL OF PLANT PHYSIOLOGY | 2000年 / 156卷 / 5-6期
关键词：
low temperature; ascorbate peroxidase; catalase; superoxide dismutase; rice (Oryza sativa);
D O I：
10.1016/S0176-1617(00)80254-0
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
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 1.8.5.1) 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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页码：811 / 813
页数：3
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