Cold tolerance performance of transgenic ipt plants in rice.

The rice varieties were treated five days under 17.5 ℃and 12 ℃ in the booting period and blooming period.The results showed that the relative conductance of ipt transgenic rice was smaller than the contrast.The destroyed chlorophyll of ipt transgenic rice was reduced under the low-temperature.The root activity of ipt-transgenic rice was larger than the contrast.And it was greater than ipt transgenic rice that low-temperature impact on yield of contrast.Finally,using the analytic approaches of grey related degree,it was analyzed and judged that every index had relation with the single output in different treatments.There were indexes including the rate of conductance,root activity,chlorophyll a/b and 1000-grain wight to exert a great influence on the single output under the low temperature.