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June 20, 2026PLANT PHYSIOLOGY

OsMAPK20-1 and OsMAPK20-4 phosphorylate OsCK2β3 to regulate its stability in response to phosphate starvation in rice

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Authors

MXMengyang XieMYMeng YanHKHudong Kuang

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Overview

Randomized trial demonstrates that OsMAPK20-1 and OsMAPK20-4 regulate phosphate levels in rice, suggesting a mechanism for nutrient homeostasis.

Key Points

  • This research aims to investigate the role of OsMAPK20-1 and OsMAPK20-4 in regulating the stability of OsCK2β3 during phosphate starvation in rice.
  • Examined the interaction between OsMAPK20-1, OsMAPK20-4, and OsCK2β3.
  • Analyzed the effects of phosphorylation at Ser-45 on OsCK2β3 stability and phosphate levels in rice.
  • Mutational analysis was conducted to assess changes in phosphate accumulation and protein interactions.
  • Mutation of OsMAPK20-1 or OsMAPK20-4 led to increased phosphate accumulation in rice.
  • Overexpression of OsCK2β3 phospho-mimetic forms reduced phosphate levels under phosphate-deficient conditions.
  • Overexpression of OsMEK1DD decreased rice phosphate concentration and inhibited phosphate transporter trafficking.

Cite This Study

Xie et al. (2026) studied this question.

synapsesocial.com/papers/6a362f11db0793dc1a536a4ahttps://doi.org/10.1093/plphys/kiag402
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