Natural variations in the OsCPK9 promoter confer chilling tolerance in rice by stabilizing OsSAPK8 through phosphorylation.

ABSTRACT:

Background

The response and integration of cold signals are key processes when plants cope with cold stress. It remains a challenging problem to study the function of calcium (Ca²⁺) sensor in mediating the Ca²⁺ signaling during the early stage of cold signal transduction.

Results

Here, we focused on the Ca²⁺ sensor gene OsCPK9 to explore its function in chilling tolerance. Our results showed that OsCPK9 exhibits a significant cold-induced expression pattern, and contributes to chilling tolerance at seedling stages. The haplotype and population genetics analysis indicated that the promoter region of OsCPK9 harbors favorable allelic variations that were strongly selected during the domestication process of japonica rice. Furthermore, OsCPK9 int

SUBMITTER: Liu M 

PROVIDER: S-EPMC12699827 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature