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August 22, 2026Journal of Experimental Botany

The Rice Protein Kinase OsCIPK7 Enhances Salt Tolerance by Regulating Potassium Homeostasis

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Authors

YQYuan QinQGQun GaoXFXin Fan

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Overview

Experimental study reveals OsCIPK7 enhances salt tolerance by maintaining potassium homeostasis in rice, indicating potential avenues for crop engineering.

Key Points

  • To investigate the functional role and regulatory mechanisms of the root-expressed protein kinase OsCIPK7 in mediating rice tolerance to salt stress.
  • Generated OsCIPK7 knockout rice mutants and compared their growth and ion distribution with wild-type plants under salt stress conditions.
  • Tested the effects of tetraethylammonium chloride, a potassium channel inhibitor, on the mutant phenotypes.
  • Conducted transcriptomic profiling to identify downstream genes and pathways regulated by OsCIPK7.
  • OsCIPK7 knockout seedlings exhibited marked hypersensitivity to salt stress and reduced total potassium content, with decreased potassium allocation to roots and young leaves but no significant change in sodium accumulation.
  • Phenotypic differences and potassium distribution defects in knockout seedlings were completely mitigated following treatment with tetraethylammonium chloride.
  • Transcriptome analysis indicated that OsCIPK7 regulates genes involved in ion transport, redox homeostasis, cell wall integrity, and hormonal signaling.

Cite This Study

Qin et al. (2026) studied this question.

synapsesocial.com/papers/6a895f62ca7ade938187dff2https://doi.org/10.1093/jxb/erag410
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1LjCIPK1: a CBL-interacting protein kinase from L. japonica, confers tolerance to salt in Arabidopsis2026
  2. 2OsCaM1-1 Is Responsible for Salt Tolerance by Regulating Na<sup>+</sup>/K<sup>+</sup> Homoeostasis in Rice2025
  3. 3Evolutionary Dynamics of the CBL-CIPK Gene Families in Five Grasses and Expression/Interaction Analysis in Rice: Focus on an OsCBL4-Associated Module2026
  4. 4OsCIPK18 Mediates Nitrate-Regulated Rice Root Growth through the Nitrogen Metabolism Pathway: Insights from Quantitative Proteomic and Phosphoproteomic Analyses2026
  5. 5Calcium-Dependent Protein Kinase 5 and 13 enhance salt tolerance in rice by directly activating OsMPK3/6 kinases2024 · 29 citations