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  11. Identification Of Antifungal Metabolites From A Soil-derived Streptomyces Strain Active Against Fusarium Graminearum Using Genome Mining

Identification of antifungal metabolites from a soil-derived Streptomyces strain active against Fusarium graminearum using genome mining

Xingyu Liu1, Lubna Rahman1,2, Yang Zhang1

  • 1School of Life Sciences, Anhui University, Hefei, 230601, Anhui, China.

Biotechnology Letters
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Soil microbes yield potent antifungal compounds. A novel Streptomyces strain, AHU1, produces lucensomycin, showing promise as a sustainable fungicide to combat Fusarium head blight in crops.

Area of Science:

  • Agricultural Science
  • Microbiology
  • Biotechnology

Background:

  • Soil-derived microbes are a rich source of bioactive secondary metabolites crucial for drug discovery.
  • Fusarium graminearum causes Fusarium head blight, a significant threat to wheat production worldwide.
  • Developing novel, sustainable fungicides is essential for effective crop protection.

Purpose of the Study:

  • To isolate and characterize a soil microbe with antifungal properties against Fusarium graminearum.
  • To validate the potential of the isolated strain as a phytopathogenic fungicide.
  • To identify the specific antifungal compound and its biosynthetic gene cluster (BGC).

Main Methods:

  • Isolation and screening of soil-derived Streptomyces strains for antifungal activity.
Keywords:
Streptomyces sp. AHU1Antifungal metaboliteGenome miningLucensomycin

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  • In vitro antifungal assays and infection bioassays on wheat seedlings.
  • Whole genome sequencing and anti-SMASH genome mining to identify BGCs.
  • Targeted isolation and functional analysis of BGCs.

    • Main Results:

    • A Streptomyces strain, AHU1, demonstrated potent antifungal activity against Fusarium graminearum.
    • Genome mining revealed approximately 34 BGCs in Streptomyces sp. AHU1.
    • The antifungal activity was attributed to the known compound lucensomycin.
    • Wheat seedling bioassays confirmed the strain's efficacy as a fungicide.

    Conclusions:

    • Streptomyces sp. AHU1 is a promising candidate for developing sustainable crop protection strategies.
    • Integrated bioassay screening and genome mining is an effective approach for discovering novel phytopathogenic fungicides.
    • Lucensomycin produced by Streptomyces sp. AHU1 offers a potential solution for Fusarium head blight management.