Abstract：
:Forty Bacillus isolates obtained from maari (used as condiment in Burkina Faso) including 17 B. subtilis, 4 B. circulans, 7 B. pumilus and 6 B. licheniformis were investigated for use as starter cultures in maari production. The isolates were screened by PCR for the sfp gene responsible for the production of the lipopeptide biosurfactant, surfactin. The sfp gene was detected in all of the seventeen B. subtilis isolates, in 2 out of 7 B. pumilus, in 4 out of 6 B. licheniformis whereas no B. circulans was positive for the sfp gene by PCR screening. Furthermore, all the 40 Bacillus spp. were screened for biosurfactant production and inhibitory activity against Aspergillus flavus, A. niger, A. versicolor and Rhizopus oryzae. Results demonstrated a relationship between the presence of the sfp gene and the antifungal activity and biosurfactant production of Bacillus isolates. In addition, molecular typing of the 17 B. subtilis isolates by Multilocus Sequence Typing (MLST) resulted in 15 Sequence Types, one of them included three strains. Randomly Amplified Polymorphic DNA-PCR (RAPD-PCR), used for B. licheniformis, B. megaterium, B. circulans and B. pumilus revealed that the inhibitory activity and biosurfactant production were strain-dependent. Finally, the detection of chitinase (chi) and β-glucanase (glu) biosynthesis genes was found to be associated with the antifungal activity for 16 B. subtilis isolates. The present work provides a greater understanding of the antifungal activity and biosurfactant production ability within the Bacillus spp. isolated from maari and contributes to the selection of Bacillus isolates to be used as starter cultures for controlled production of maari.
journal_name
Microbiol Resjournal_title
Microbiological researchauthors
Kaboré D,Gagnon M,Roy D,Sawadogo-Lingani H,Diawara B,LaPointe Gdoi
10.1016/j.micres.2017.11.005subject
Has Abstractpub_date
2018-03-01 00:00:00pages
66-74eissn
0944-5013issn
1618-0623pii
S0944-5013(16)30829-1journal_volume
207pub_type
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