Biofilm Formation and Synthesis of Antimicrobial Compounds by the Biocontrol Agent Bacillus velezensis QST713 in an Agaricus bisporus Compost Micromodel

Biocontrol agents are increasingly used to replace chemical pesticides to prevent crop diseases. In the button mushroom field in France, the use of Bacillus velezensis QST713 as a biocontrol agent against the green mold Trichoderma aggressivum has been shown to be efficient. However, the biocontrol mechanisms effective in the Agaricus bisporus / Trichoderma aggressivum / Bacillus velezensis QST713 pathosystem are still unknown. Our paper focuses on the exploration of the bioprotection mechanisms of the biocontrol agent Bacillus velezensis QST713 during culture of the button mushroom ( Agaricus bisporus ) in a micromodel culture system to study the specific response of strain QST713 in the presence of T. aggressivum and/or A. bisporus .