title: Medium optimization of antifungal activity production by Bacillus amyloliquefaciens using statistical experimental design.
abstract: In order to overproduce biofungicides agents by Bacillus amyloliquefaciens BLB371, a suitable culture medium was optimized using response surface methodology. Plackett-Burman design and central composite design were employed for experimental design and analysis of the results. Peptone, sucrose, and yeast extract were found to significantly influence antifungal activity production and their optimal concentrations were, respectively, 20 g/L, 25 g/L, and 4.5 g/L. The corresponding biofungicide production was 250 AU/mL, corresponding to 56% improvement in antifungal components production over a previously used medium (160 AU/mL). Moreover, our results indicated that a deficiency of the minerals CuSO(4), FeCl(3) · 6H(2)O, Na(2)MoO(4), KI, ZnSO(4) · 7H(2)O, H(3)BO(3), and C(6)H(8)O(7) in the optimized culture medium was not crucial for biofungicides production by Bacillus amyloliquefaciens BLB371, which is interesting from a practical point of view, particularly for low-cost production and use of the biofungicide for the control of agricultural fungal pests.
authors.affiliation: Team of Biopesticides (LPIP), Centre of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia.
authors.forename: Héla
authors.initials: H
authors.lastname: Mezghanni
authors.forename: Saoussen Ben
authors.initials: SB
authors.lastname: Khedher
authors.forename: Slim
authors.initials: S
authors.lastname: Tounsi
authors.forename: Nabil
authors.initials: N
authors.lastname: Zouari
mesh_terms: D000935:Antifungal Agents / Q000737:chemistry*; D001234:Aspergillus niger / Q000187:drug effects / Q000254:growth & development; D001407:Bacillus / Q000737:chemistry* / Q000254:growth & development; D058491:Bacterial Load; D002712:Chlorides / Q000737:chemistry; D019295:Computational Biology; D019327:Copper Sulfate / Q000737:chemistry; D003470:Culture Media / Q000737:chemistry*; D005285:Fermentation; D005290:Ferric Compounds / Q000737:chemistry; D010461:Peptones / Q000737:chemistry; D013171:Spores, Bacterial / Q000737:chemistry; D013172:Spores, Fungal / Q000187:drug effects; D013395:Sucrose / Q000737:chemistry; D013997:Time Factors; D019287:Zinc Sulfate / Q000737:chemistry
chemical_list: D000935:Antifungal Agents; D002712:Chlorides; D003470:Culture Media; D005290:Ferric Compounds; D010461:Peptones; D013395:Sucrose; D019287:Zinc Sulfate; D019327:Copper Sulfate; C024555:ferric chloride