Article (Scientific journals)
Metabarcoding analysis and fermentation performance of the dominant fungal microbiota associated with the Algerian traditional date product "Btana".
Abekhti, Abdelkader; Taminiau, Bernard; Nezer, Carine et al.
2021In International microbiology : the official journal of the Spanish Society for Microbiology
Peer reviewed
 

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Keywords :
Btana; Dates; Fermentation; Metabarcoding; Pyrosequencing; Traditional food; Yeasts
Abstract :
[en] The study highlights the fungal diversity of the traditional Algerian date's product "Btana" prepared with direct Btana method (DBM) and undirect Btana method (UBM). Btana fungal populations were analyzed through 28S metabarcoding. Data treatment resulted in 122,997 reads representing three Phyla in which 76% reads (46 OTUs) belong to Ascomycota phylum. Zygosaccharomyces rouxii was the most prevailed species accounting for 35.40% of the total population. Similarity percentage analysis revealed a low level of resemblance in species in each of the two Btana types (DBM: 17.26%, UBM: 16.87). According to HPLC analysis, lactate was detected in nine samples within a range of 0.87-23.06 g/100g. Culture plating and subsequent D1/D2 domain of 28s DNA analysis showed the prevalence of Z. rouxii. Fermentation of non-renewed date medium revealed a high ethanol production (21.31 ± 2.89 g/100g) by Lachancea thermotolerans and 5.87 g/100g of lactates by Kluyveromyces delphensis. Enzymatic assay revealed a high esterase (C4) and naphtol-AS-BI-phosphohydrolase activity by L. thermotolerans, K. delphensis, and Pichia subpelliculosa, while a high level of α-fucosidase was recorded for L. thermotolerans and P. subpelliculosa. The current results demonstrated that the traditional date product Btana is a promising source for yeasts useful in production of value-added products like bioethanol and lactic acid using low-income date cultivars.
Disciplines :
Food science
Author, co-author :
Abekhti, Abdelkader
Taminiau, Bernard  ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Microbiologie des denrées alimentaires
Nezer, Carine
Hiligsman, Serge
Mabrouk, Kihal
Daube, Georges  ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Microbiologie des denrées alimentaires
Language :
English
Title :
Metabarcoding analysis and fermentation performance of the dominant fungal microbiota associated with the Algerian traditional date product "Btana".
Publication date :
2021
Journal title :
International microbiology : the official journal of the Spanish Society for Microbiology
ISSN :
1139-6709
eISSN :
1618-1905
Peer reviewed :
Peer reviewed
Available on ORBi :
since 22 March 2021

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