Biologia plantarum 49:81-84, 2005 | DOI: 10.1007/s00000-005-1084-3
Responses of antioxidative system to chilling stress in two rice cultivars differing in sensitivity
- 1 College of Life Science, South China Agricultural University, Guangzhou, China
The responses of antioxidative system of rice to chilling were investigated in a tolerant cultivar, Xiangnuo-1, and a susceptible cultivar, IR-50. The electrolyte leakage and malondialdehyde content of Xiangnuo-1 were little affected by chilling treatment but those of IR-50 increased. Activities of suoperoxide dismutase, catalase, ascorbate peroxidase and glutathione reductase, and ascorbic acid content of Xiangnuo-1 were remained high, while those of IR-50 decreased under chilling. The results indicated that higher activities of defense enzymes and higher content of antioxidant under stress were associated with tolerance to chilling.
Keywords: ascorbate peroxidase; ascorbic acid; catalase; glutathione reductase; superoxide dismutase
Subjects: antioxidants, chilling stress; antioxidants, enzymes; ascorbate peroxidase; catalase; chilling stress and tolerance; cultivar and genotype differences, chilling; electrolyte leakage, chilling stress; glutathione reductase; leakage, electrolyte; malondialdehyde; nutrient medium Kimura B; Oryza sativa; oxidative stress, antioxidants; reactive oxygen species (ROS); rice, antioxidants, chilling stress; salt stress, antioxidant enzymes; superoxide dismutase
Received: September 29, 2003; Accepted: June 22, 2004; Published: March 1, 2005 Show citation
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