TITLE:
Influence of Antibiotics and Surfactants Addition on Growth and Methionine Productivity by Bacillus cereus
AUTHORS:
Kelechi Stanley Dike, Ikechukwu Amechi Ekwealor, Samuel Chukwunyelum Eziuzor
KEYWORDS:
Methionine; Bacillus cereus; Fermentation; Antibiotics; Surfactants
JOURNAL NAME:
Advances in Microbiology,
Vol.3 No.1,
March
27,
2013
ABSTRACT: The effects of antibiotics and surfactant addition on methionine
accumulation in the broth culture of three strains of methionine yeilding Bacillus cereus (B. cereus DS-13, B. cereus AS-9 and B. cereus RS-16) recovered from different soil ecovars in Owerri Nigeria
were investigated. Ampicillin and erythromycin neither stimulated growth nor
enhanced methionine production in Bacillus
cereus DS-13, while tetracycline and chloramphenicol stimulated growth and
enhanced methionine yield in Bacillus
cereus DS-13 and Bacillus cereus AS-9. Ampicllin had the highest stimulatory effect on growth and methionine
production in Bacillus cereus RS 16.
Tween 80 and palmitic acid stimulated growth and improved methionine
accumulation in the broth culture of all Bacillus strains while stearic acid did not improve yield in all Bacillus strains.