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A SERK3-PSKR1 Module Negatively Regulates Rice Resistance to Planthoppers.

Yubing Feng1,2, Shuting Chen1,2, Shiyun Jing1,2

  • 1State key laboratory of rice Biology and Breeding & Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, Hangzhou, China.

Plant, Cell & Environment
|June 12, 2026
PubMed
Summary
This summary is machine-generated.

Somatic embryogenesis receptor-like kinases (SERKs) regulate plant defense. The OsSERK3 gene in rice is vital for resisting brown planthopper (BPH) by interacting with OsPSKR1, enhancing plant immunity.

Keywords:
ethyleneherbivore‐induced plant defensejasmonic acidphytosulfokine receptorricesomatic embryogenesis receptor‐like kinase

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Area of Science:

  • Plant molecular biology
  • Plant-insect interactions
  • Plant defense mechanisms

Background:

  • Somatic embryogenesis receptor-like kinases (SERKs) are crucial for plant growth and stress responses.
  • The role of SERKs in plant defense against herbivores is not well understood.
  • Brown planthopper (BPH) is a major rice pest, causing significant agricultural damage.

Purpose of the Study:

  • To investigate the function of the rice SERK gene, OsSERK3, in plant defense against BPH.
  • To elucidate the molecular mechanisms underlying OsSERK3-mediated BPH resistance.
  • To explore the interaction between OsSERK3 and other plant receptors in defense signaling.

Main Methods:

  • Gene expression analysis (RT-qPCR) under various stress conditions (wounding, MeJA, BPH infestation).
  • Generation and analysis of OsSERK3 knockout rice lines.
  • Measurement of defense hormone levels (JA, JA-Ile, ET).
  • Protein-protein interaction studies (co-immunoprecipitation).
  • Analysis of OsPSKR1 knockout lines.

Main Results:

  • OsSERK3 expression is induced by mechanical wounding, MeJA, and BPH infestation.
  • OsSERK3 knockout rice exhibited enhanced resistance to BPH, with increased defense-related WRKY transcripts and JA signaling, but reduced ET accumulation.
  • OsSERK3 physically interacts with the rice phytosulfokine receptor, OsPSKR1.
  • Knocking out OsPSKR1 mimicked the effects of OsSERK3 knockout on defense pathways and BPH resistance.

Conclusions:

  • The OsSERK3-OsPSKR1 module plays a critical role in regulating rice defense against BPH.
  • This interaction modulates key defense signaling pathways, including WRKYs and hormone crosstalk (JA/ET).
  • Targeting the OsSERK3-OsPSKR1 pathway presents a potential strategy for developing novel rice pest control methods.