%0 Journal Article %A Lei YAN %A Liu ZENG %A Yan LYU %A Xiao-yu DING %A Yong CHENG %A Qiang ZHAN %A Xiao-yan WANG %A Wu-zhou BAO %A Xiao-fang LI %A Xi-ling ZOU %T Physiological and biochemical response of growth in rapeseed (Brassica napus L.) under low temperature %D 2021 %R 10.19802/j.issn.1007-9084.2020286 %J CHINESE JOURNAL OF OIL CROP SCIENCES %P 1061-1069 %V 43 %N 6 %X

To improve cold tolerance breeding of rapeseed (Brassica napus L.), effect of low temperature on rapeseed growth was studied using 8 cultivars. In natural temperature (falling with 2.75℃ mean temperature), the content of proline and chlorophyll in cold tolerant varieties were higher than those in cold sensitive ones, and the relative conductivity had no significant differences. When the natural temperature rising to the mean temperature of 7.52℃ to 12.39℃, no difference was found of the biomass for the recovery growth in these varieties. Under 10℃/4℃, biomass of all varieties was increased in the first 3 weeks. But from the fourth week, the biomass of cold sensitive varieties decreased with white spots in new leaves. While, the biomass of cold tolerant varieties remained unchanged with white spots appeared in old leaves. Under low temperature, proline continued to increase, and chlorophyll became significantly higher, which resulted in significant growth advantage in cold tolerant rapeseed varieties.

%U http://www.jouroilcrops.cn/EN/10.19802/j.issn.1007-9084.2020286