您好，欢迎访问山东省农业科学院文献资源数据库平台

The Sweetpotato Voltage-Gated K+ Channel beta Subunit, KIbB1, Positively Regulates Low-K+ and High-Salinity Tolerance by Maintaining Ion Homeostasis

文献类型： 外文期刊

作者： Zhu, Hong 1 ; Yang, Xue 1 ; Li, Qiyan 1 ; Guo, Jiayu 1 ; Ma, Tao 1 ; Liu, Shuyan 1 ; Lin, Shunyu 1 ; Zhou, Yuanyuan 3 ; Zhao, Chunmei 1 ; Wang, Jingshan 1 ; Sui, Jiongming 1 ;

作者机构： 1.Qingdao Agr Univ, Coll Agron, Qingdao 266109, Peoples R China

2.Hebei Acad Sci, Inst Biol, Lab Microbiol, Shijiazhuang 050081, Hebei, Peoples R China

3.Shandong Acad Agr Sci, Sci Observing & Expt Stn Tuber & Root Crops Huang, Minist Agr & Rural Affairs, Crop Res Inst, Jinan 250100, Peoples R China

关键词： sweetpotato; voltage-gated K+ channel beta subunit; KIbB1; low K+; high salinity; ion homeostasis

期刊名称：GENES （ 影响因子：4.141； 五年影响因子：4.474 ）

ISSN：

年卷期： 2022 年 13 卷 6 期

页码：

收录情况： SCI

摘要： Voltage-gated K+ channel beta subunits act as a structural component of K-in channels in different species. The beta subunits are not essential to the channel activity but confer different properties through binding the T1 domain or the C-terminal of alpha subunits. Here, we studied the physiological function of a novel gene, KIbB1, encoding a voltage-gated K+ channel beta subunit in sweetpotato. The transcriptional level of this gene was significantly higher in the low-K+-tolerant line than that in the low-K+-sensitive line under K+ deficiency conditions. In Arabidopsis, KIbB1 positively regulated low-K+ tolerance through regulating K+ uptake and translocation. Under high-salinity stress, the growth conditions of transgenic lines were obviously better than wild typr (WT). Enzymatic and nonenzymatic reactive oxygen species (ROS) scavenging were activated in transgenic plants. Accordingly, the malondialdehyde (MDA) content and the accumulation of ROS such as H2O2 and O2- were lower in transgenic lines under salt stress. It was also found that the overexpression of KIbB1 enhanced K+ uptake, but the translocation from root to shoot was not affected under salt stress. This demonstrates that KIbB1 acted as a positive regulator in high-salinity stress resistance through regulating Na+ and K+ uptake to maintain K+/Na+ homeostasis. These results collectively suggest that the mechanisms of KIbB1 in regulating K+ were somewhat different between low-K+ and high-salinity conditions.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：山东省农业科学院文献资源数据库平台

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台