OsKASI-2 is required for the regulation of unsaturation levels of membrane lipids and chilling tolerance in rice

文献类型： 外文期刊

第一作者： Zhang, Lin

作者： Zhang, Lin;Wang, Siyao;Chen, Yijun;Xiang, Zhipan;Chen, Chen;Kuang, Xuemei;Chen, Liangbi;Mao, Dandan;Zhang, Lin;Bai, Bin;Yang, Yuanzhu;Fu, Jun

作者机构：

关键词： rice; OsKASI-2; chilling stress; degree of unsaturation of membrane lipids; natural variation

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：13.8； 五年影响因子：13.2 ）

ISSN： 1467-7644

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Chilling stress has seriously limited the global production and geographical distribution of rice. However, the molecular mechanisms associated with plant responses to chilling stress are less known. In this study, we revealed a member of beta-ketoacyl-ACP synthase I family (KASI), OsKASI-2 which confers chilling tolerance in rice. OsKASI-2 encodes a chloroplast-localized KASI enzyme mainly expressed in the leaves and anthers of rice and strongly induced by chilling stress. Disruption of OsKASI-2 led to decreased KAS enzymatic activity and the levels of unsaturated fatty acids, which impairs degree of unsaturation of membrane lipids, thus increased sensitivity to chilling stress in rice. However, the overexpression of OsKASI-2 significantly improved the chilling tolerance ability in rice. In addition, OsKASI-2 may regulate ROS metabolism in response to chilling stress. Natural variation of OsKASI-2 might result in difference in chilling tolerance between indica and japonica accessions, and Hap1 of OsKASI-2 confers chilling tolerance in rice. Taken together, we suggest OsKASI-2 is critical for regulating degree of unsaturation of membrane lipids and ROS accumulation for maintenance of membrane structural homeostasis under chilling stress, and provide a potential target gene for improving chilling tolerance of rice.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序