关键词: 低温, 草莓叶片, 光质, 抗性指标

Abstract: To study the effects of light quality on resistant index in strawberry leaves under low temperature stress， different light qualities including white light， red light， blue light and red and blue mixed light （1∶1） were used to irradiate strawberry seedlings under 4 ℃ for 12， 24， 48 and 72 h. The results showed that white light had an advantage of improving SOD， CAT， POD activities， which could effectively remove ROS and protect cell membranes from oxidation. Yet， white light was not conducive to increase the content of osmolytes. Red light could improve soluble sugar contents， and inhibit the production of MDA. Blue light was helpful to increase proline and soluble protein contents， but not good for the increase in antioxidant enzymes activities and maximum photosynthetic rate. Mixed light （red∶blue=1∶1） had the dual effects of red and blue light. It was concluded that adequate supplies of red， mixed light （red∶blue=1∶1） had a favor to improve resistance of strawberry to low temperature.

Key words: low temperature, strawberry leaves, light quality, resistant indexes