Co-culture of Bacillus amyloliquefaciens ACCC11060 and Trichoderma asperellum GDFS1009 enhanced pathogen-inhibition and amino acid yield

发布日期：2021-01-31

Author: Qiong Wu†, Mi Ni†, Kai Dou†, Jun Tang, Jianhong Ren, Chuanjin Yu, Jie Chen *

Background: Bacillus spp. are a genus of biocontrol bacteria widely used for antibiosis, while Trichoderma spp. Are biocontrol fungi that are abundantly explored. In this study, a liquid co-cultivation of these two organisms was tried firstly.

Results and discussion: Through liquid chromatography-mass spectrometry/mass spectrometry (LC–MS/MS), it was discovered that with an inoculation in the ratio of 1.9:1, the antimicrobial effect of the co-cultured fermentation liquor of Bacillus amyloliquefaciens ACCC11060 and Trichoderma asperellum GDFS1009 was found to be significantly higher than that of pure-cultivation. A raise in the synthesis of antimicrobial substances contributed to this significant increase. Additionally, a co-culture with the inoculation of the two organisms in the ratio of 1:1 was found to enhance the production of specific amino acids. This technique could be further explored for either a large scale production of amino acids or could serve as a theoretical base for the generation of certain rare amino acids.

Conclusions: This work clearly demonstrated that co-cultivation of B. amyloliquefaciens ACCC11060 and T. asperellum GDFS1009 could produce more specific biocontrol substances and amino acids.

Keywords: Bacillus amyloliquefaciens, Trichoderma asperellum, Liquid co-cultivation, Amino acid, Biocontrol metabolites

Source:Microb Cell Fact (2018) 17:155