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Coexistence of and Interaction Relationships Between an Aflatoxin-Producing Fungus and a Bacterium

Coexistence of and Interaction Relationships Between an Aflatoxin-Producing Fungus and a Bacterium

Quan-Hong Yan, Jian-Xiang Zhou, Hong-Zhou Li, Qing-Qing Zhi, Xiao-Ping Zhou, Zhu-Mei He

Fungal Biol. 2015 Jul;119(7):605-14.

PMID: 26058536

Abstract:

The interactions between aflatoxin-producing fungi and bacteria have opened up a new avenue for identifying biological agents suitable for controlling aflatoxin contamination. In this study, we analysed the interactions between A. flavus and the bacterium Burkholderia gladioli M3 that coexist in rice that is naturally contaminated with A. flavus. Our results showed that a cell-free culture filtrate (CCF) and the metabolite bongkrekic acid of the M3 strain potently suppressed the mycelial growth and spore production, and then affected the production of aflatoxin of A. flavus. Bongkrekic acid secreted by the M3 strain exhibited higher antifungal activity than did analogues. The CCF of the M3 strain and its metabolite bongkrekic acid can inhibit the growth of A. flavus, but the metabolites of A. flavus, aflatoxins, exerted no inhibitory effect on the growth of the M3 strain. Furthermore, we determined that the M3 cells could use the dead mycelia of A. flavus as energy sources for reproduction, while A. flavus could not grow in a solution containing dead M3 cells. In summary, these results indicated that B. gladioli has a competitive advantage in survival when it coexists with its fungal partner A. flavus.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP11076190	Bongkrekic acid solution		11076-19-0	Price

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