Novel Insights into Streptomyces Species as Biocontrol Agents Against Black Rot Disease

Strategic Insights -

Researchers from Jiangsu Normal University have made significant breakthroughs in understanding the potential of Streptomyces species as biocontrol agents against the black rot disease affecting sweetpotatoes. The disease, caused by Ceratocystis fimbriata, poses a significant threat to sweetpotato production worldwide. The study found that Streptomyces djakartensis strain MEPS155 effectively inhibited C. fimbriata's growth, compromised its cell wall and membrane integrity, and disrupted mitochondrial function. Additionally, transcriptomic analysis revealed significant down-regulation of genes related to pathogenicity, cellular composition, and energy production in C. fimbriata treated with strain MEPS155.

Key Takeaways:

  • Streptomyces species, specifically Streptomyces djakartensis strain MEPS155, have been identified as promising biocontrol agents against Ceratocystis fimbriata, the causative agent of black rot disease.
  • The study found that strain MEPS155 significantly inhibited C. fimbriata's biomass, compromised its cell wall and membrane integrity, and disrupted mitochondrial function.
  • Transcriptomic analysis revealed significant down-regulation of genes related to pathogenicity, cellular composition, and energy production in C. fimbriata treated with strain MEPS155.
  • The study identified CfsteA as an important target gene for preventing and controlling sweetpotato black rot.
  • Genetic transformation of CfsteA mutants resulted in altered biomass, decreased conidial number and germination, damaged cell wall integrity, and reduced pathogenicity.
  • This research provides potential strategies for managing sweetpotato black rot and offers new insights into the pathogenic mechanisms of C. fimbriata.
  • Financial support for this research was provided by the Province.
  • Additional authors contributing to the research include Yongjing Zhang, Xiaoying Cao, Changgen Li, Hao Cong, Yujie Chen, Qiao Liu, Yiming Wang, Hailan Fu, Jiluan Zhang, and Ludan Li.

Statistics:

  • 229: The issue number of Postharvest Biology and Technology where the research was published.
  • 1043 Nx: The zip code of the Amsterdam office of Elsevier, where Postharvest Biology and Technology can be contacted.
  • November 4, 2025: The publication date of the news report detailing the research by NewsRx.
  • 6885: The page number of the news report in Life Science Weekly.

Sources:

  • NewsRx. Studies from Jiangsu Normal University Update Current Data on Streptomyces (Postharvest Biocontrol Ability and Antagonistic Mechanism Of Streptomyces Djakartensis Meps155 Against Ceratocystis Fimbriata In Sweetpotato). Life Science Weekly. November 4, 2025; p 6885.
  • Postharvest Biology and Technology. Postharvest Biocontrol Ability and Antagonistic Mechanism Of Streptomyces Djakartensis Meps155 Against Ceratocystis Fimbriata In Sweetpotato. Volume 229.