The growth and metabolism of Bacillus amyloliquefaciens produces low molecular weight antibiotics and antibacterial protein peptides and other active substances, which can inhibit pathogens and nematodes. Most of the active substances of metabolites are heat stable, insensitive to ultraviolet irradiation and protease treatment, and have acid and alkali resistance.
The extracellular enzymes produced by Bacillus amyloliquefaciens mainly include phytase, chitinase, glucanase, protease, amylase, rennet, etc. The main lipopeptide metabolites include antagonistic active substances such as surfcatian, fengycin, iturin and bacillo-my-cinD. In addition, it also produces plant growth hormone indole-3-acetic acid (IAA).
The fermentation broth of Bacillus amyloliquefaciens can be made into biological preparations for application on plant roots, branches, leaves, flowers, fruits and vegetables for disease prevention and control. Bacillus amyloliquefaciens preparations also promote plant growth, inhibit nematodes, and control water pollution.
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