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DGS1 improves rice disease resistance by elevating pathogen-associated molecular pattern-triggered immunity.

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|April 5, 2024
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Summary

Decreased grain size1 (DGS1) enhances rice yield and disease resistance by improving plant immunity. The DGS1-OsUBC45 module regulates key proteins, offering potential for crop improvement in rice breeding.

Keywords:
E2–E3 pairERADPTIRice blastUbiquitination

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Area of Science:

  • Plant Biology
  • Genetics
  • Agricultural Science

Background:

  • Rice yield and disease resistance are critical for agricultural breeding.
  • Decreased grain size1 (DGS1) is known to positively impact rice yield.
  • The role of DGS1 in rice blast resistance was previously uncharacterized.

Purpose of the Study:

  • To investigate the function of DGS1 in rice disease resistance.
  • To elucidate the molecular mechanism by which DGS1 influences rice immunity and yield.

Main Methods:

  • Investigated DGS1's role in plant-innate immunity (PTI) responses.
  • Analyzed ROS burst, MAPK activation, and defense gene expression.
  • Identified interacting partners and substrates of DGS1, including OsUBC45, OsGSK3, and OsPIP2;1.

Main Results:

  • DGS1 significantly enhances rice disease resistance by strengthening PTI responses.
  • DGS1 improves ROS burst, MAPK activation, and defense gene expression.
  • DGS1, with OsUBC45, targets OsGSK3 and OsPIP2;1 for ubiquitin-dependent degradation, impacting yield and immunity.

Conclusions:

  • The DGS1-OsUBC45 module plays a dual role in regulating rice yield and immunity.
  • DGS1 enhances disease resistance through improved PTI.
  • This module holds significant potential for improving rice varieties through agricultural breeding.