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Antagonistic Action of Bacillus subtilis Strain SG6 on Fusarium graminearum

Author

Listed:
  • Yueju Zhao
  • Jonathan Nimal Selvaraj
  • Fuguo Xing
  • Lu Zhou
  • Yan Wang
  • Huimin Song
  • Xinxin Tan
  • Lichao Sun
  • Lancine Sangare
  • Yawa Minnie Elodie Folly
  • Yang Liu

Abstract

Fusarium graminearum causes Fusarium head blight (FHB), a devastating disease that leads to extensive yield and quality loss of wheat and barley. Bacteria isolated from wheat kernels and plant anthers were screened for antagonistic activity against F. graminearum. Based on its in vitro effectiveness, strain SG6 was selected for characterization and identified as Bacillus subtilis. B. subtilis SG6 exhibited a high antifungal effect on the mycelium growth, sporulation and DON production of F. graminearum with the inhibition rate of 87.9%, 95.6% and 100%, respectively. In order to gain insight into biological control effect in situ, we applied B. subtilis SG6 at anthesis through the soft dough stage of kernel development in field test. It was revealed that B. subtilis SG6 significantly reduced disease incidence (DI), FHB index and DON (P≤0.05). Further, ultrastructural examination shows that B. subtilis SG6 strain induced stripping of F. graminearum hyphal surface by destroying the cellular structure. When hypha cell wall was damaged, the organelles and cytoplasm inside cell would exude, leading to cell death. The antifungal activity of SG6 could be associated with the coproduction of chitinase, fengycins and surfactins.

Suggested Citation

  • Yueju Zhao & Jonathan Nimal Selvaraj & Fuguo Xing & Lu Zhou & Yan Wang & Huimin Song & Xinxin Tan & Lichao Sun & Lancine Sangare & Yawa Minnie Elodie Folly & Yang Liu, 2014. "Antagonistic Action of Bacillus subtilis Strain SG6 on Fusarium graminearum," PLOS ONE, Public Library of Science, vol. 9(3), pages 1-11, March.
    • Handle: RePEc:plo:pone00:0092486
    DOI: 10.1371/journal.pone.0092486
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    Cited by:

    1. Nawu Takudzwa & Gwatidzo Odette Varaidzo & Rugare Joyful Tatenda & Gasura Edmore & Makaza William & Ngadze Elizabeth, 2022. "Efficacy Of Trichoderma Harzianum As A Biological Control Agent Against Fusarium Oxysporum In Tomatoes (Solanum Esculentum L.)," Food and Agri Economics Review (FAER), Zibeline International Publishing, vol. 2(1), pages 07-11, January.
    2. Lukas Beule & Ena Lehtsaar & Anna Rathgeb & Petr Karlovsky, 2019. "Crop Diseases and Mycotoxin Accumulation in Temperate Agroforestry Systems," Sustainability, MDPI, vol. 11(10), pages 1-21, May.
    3. Yanjie Yi & Pengyu Luan & Shifei Liu & Youtian Shan & Zhipeng Hou & Shuyun Zhao & Shao Jia & Ruifang Li, 2022. "Efficacy of Bacillus subtilis XZ18-3 as a Biocontrol Agent against Rhizoctonia cerealis on Wheat," Agriculture, MDPI, vol. 12(2), pages 1-15, February.

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