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A Rapid Method for Screening Pathogen-Associated Molecular Pattern-Triggered Immunity-Intensifying Microbes.

Jing-Lin Zheng1, Jia-Rong Li1, Ai-Ting Li1

  • 1Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung 912301, Taiwan.

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Summary
This summary is machine-generated.

A new GFP reporter system using the AtGSL5 gene allows for rapid, non-staining screening of beneficial microbes. This technology identifies bacteria that enhance plant immunity and reduce bacterial wilt disease.

Keywords:
agricultural managementbacterial wiltbeneficial microbesdisease controlplant immunity

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Area of Science:

  • Plant Pathology
  • Molecular Biology
  • Microbiology

Background:

  • PAMP-triggered immunity (PTI) is a crucial plant defense mechanism.
  • Rhizobacterium *Bacillus amyloliquefaciens* PMB05 enhances PTI and disease resistance.
  • A non-staining method is needed for large-scale screening of PTI-enhancing microbes.

Purpose of the Study:

  • To develop a novel, non-staining reporter system for screening microbes that enhance plant immunity.
  • To validate the efficacy of the reporter system in identifying beneficial *Bacillus* strains.
  • To assess the correlation between reporter signal intensity and disease control.

Main Methods:

  • Cloned and fused the promoter of the *GSL5* gene (involved in callose synthesis) to the GFP gene.
  • Generated transgenic *Arabidopsis* plants (At*GSL5*-GFP) expressing the reporter construct.
  • Analyzed GFP signal changes upon treatment with flg22 or harpin (PopW) and *Bacillus* strains.

Main Results:

  • At*GSL5*-GFP transgenic lines showed GFP signals upon PTI induction.
  • Co-treatment with *Bacillus amyloliquefaciens* PMB05 enhanced PopW-induced GFP signals.
  • The reporter system successfully identified *Bacillus* strains that enhance PTI and reduce bacterial wilt.

Conclusions:

  • The At*GSL5*-GFP reporter system provides a sensitive, non-staining method for screening plant immunity-enhancing microbes.
  • This technology can be used to identify beneficial *Bacillus* strains for controlling bacterial wilt.
  • The reporter system offers a promising platform for agricultural applications.