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

ABSTRACT: Voltage-gated K⁺ channel β subunits act as a structural component of K_in channels in different species. The β subunits are not essential to the channel activity but confer different properties through binding the T1 domain or the C-terminal of α subunits. Here, we studied the physiological function of a novel gene, KIbB1, encoding a voltage-gated K⁺ channel β 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 gr

SUBMITTER: Zhu H 

PROVIDER: S-EPMC9222298 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature