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Ectopic expression of BdCIPK31 confers enhanced low-temperature tolerance in transgenic tobacco plants.

Luo, Qingchen; Wei, Qiuhui; Wang, Ruibin; Zhang, Yang; Zhang, Fan; He, Yuan; Yang, Guangxiao; He, Guangyuan.
Acta Biochim Biophys Sin (Shanghai); 50(2): 199-208, 2018 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-29309501
Calcineurin B-like protein (CBL), the Ca2+ sensor, and its interacting protein kinases (CIPKs) play essential roles in plants' response to stress. However, few studies have focused on the functions of CIPKs in low-temperature response. In the present study, BdCIPK31, a cold-responsive CIPK in Brachypodium distachyon, was found to participate in low-temperature response. Ectopic expression of BdCIPK31 conferred cold tolerance in transgenic tobaccos. Further analyses indicated that expression of BdCIPK31 improved ROS detoxication and omsoprotectant biosynthesis in transgenic plants under low-temperature treatment, suggesting that the BdCIPK31 functions positively in plant adaption to the cold-induced oxidative and osmotic stresses. Moreover, BdCIPK31 could upregulate the expressions of some representative stress-related genes under cold stress. In conclusion, these findings suggest that BdCIPK31 functions positively in plant cold response.
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