OsCK2 Phosphorylates OsSIZ1 to Regulate Phosphate Starvation Response and Defence Response in Rice.

ABSTRACT: Phosphorus is a crucial nutrient for the normal growth and development of rice. Enhancing the efficiency of phosphorus acquisition in plants is vital for optimising soil phosphorus utilisation. The SUMO E3 ligase OsSIZ1 is an important factor for regulating plant phosphorus acquisition and starvation response in rice. However, how its activity responds to Pi-supplied conditions remains unknown. In this study, we discovered that the mutations in OsCK2β3, which encodes a regulatory subunit of CK2, influenced the Pi starvation response. The global level of SUMOylation was found to decrease in Osck2β3 mutants, mirroring the effects observed under Pi-deficiency treatment. Additionally, we identified that OsCK2 can interact with and phosphorylate OsSIZ1, thereby impacting its stability. Transcri

SUBMITTER: Xie M 

PROVIDER: S-EPMC12665081 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature