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Volatile Organic Compounds Produced by Co-Culture of Burkholderia vietnamiensis B418 with Trichoderma harzianum T11-W Exhibits Improved Antagonistic Activities against Fungal Phytopathogens

Summary

Scientists studied how two beneficial microorganisms (a bacterium and a fungus) work together to produce compounds that kill plant-damaging fungi. When grown together, they produced more protective compounds than when grown separately, showing promise as a natural alternative to chemical fungicides for protecting crops and stored fruits from fungal diseases.

Background

Volatile organic compounds (VOCs) produced by microorganisms have demonstrated biocontrol potential against plant pathogens. Both Burkholderia and Trichoderma species are known to produce VOCs with antimicrobial properties, but their synergistic effects in co-culture have not been extensively studied.

Objective

To investigate the VOC production and antagonistic activities of co-cultured Burkholderia vietnamiensis B418 and Trichoderma harzianum T11-W against the phytopathogenic fungi Botrytis cinerea and Fusarium oxysporum f. sp. cucumerium Owen.

Results

The co-culture demonstrated significantly higher inhibitory effects (82.21% against B. cinerea and 86.57% against F. oxysporum) compared to mono-cultures. GC-MS analysis identified 190 compounds in co-culture VOCs, with key antagonistic compounds including linalool, dimethyl trisulfide, dimethyl disulfide, geranylacetone, 2-phenylethanol, and acetophenone.

Conclusion

Co-cultivation of B. vietnamiensis B418 and T. harzianum T11-W effectively enhances antagonistic activity against fungal phytopathogens through increased production of specific VOCs. These findings support the potential development of composite microbial pesticides for biological plant disease control.
  • Published in:International Journal of Molecular Sciences,
  • Study Type:Experimental Research,
  • Source: PMID: 39456879, DOI: 10.3390/ijms252011097
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