The chitinase bio-production ability of the Bacillus strain Q3 having the high antagonism toward fungi

Abstract

In a trial study for the isolation of chitin-degrading bacteria from soil samples of agricultural fields from Hanoi city and Thaibinh, Hoabinh provinces, we have isolated 22 bacterial strains. Among these 22 strains, there was the Bacillus strain Q₃ having the highest antagonism toward Fungi (Aspergilus VN04-460; Trichoderma VN04-412; Eurotium amstelodami; Eurotium chevalieri; Fusarium oxysporum) and the highest chitin hydrolyzis. On the MS medium with 0,2% colloidal chitin, the chitinase activity of the Bacillus strain Q₃ culture reached the highest value after 48 hours, at 37°C and with pH 7.0.