关键词: 不饱和脂肪酸, 活性氧, 抗寒性, 转基因植物

Abstract: Chilling temperature is one of the important environmental factors to limit the distribution of plant chilling-sensitive species and decrease the productivity of tropical and subtropical crops. Those plants are also injured at chilling temperature. Under chilling stress, ion leakage resulting from the membrane lipid phase transition leads to the metabolism disorder of plant cell and at the same time, the cell is injured by the accumulation of AOS (Active oxygen species). This paper summaries the genes involved in the membrane stability and scavenging AOS under chilling stress. The regulation of the gene expression and their application in improvement of crops tolerant to chilling stress are also discussed here.

Key words: unsaturated fatty acids, active oxygen, chilling tolerance, transgenic plants