Abstract
Actinobacteria are an extremely diverse group of bacteria known for their ability to produce a range of biotechnologically relevant enzymes. Tunisian Forest ecosystems are relatively unexplored in terms of actinobacterial diversity and their enzyme activities, offering an excellent opportunity to isolate new potent actinobacterial strains that produce bioactive natural products. In this study, actinobaceria were isolated from soil samples collected from four forests in the Northern part of Tunisia, using Starch-casein media and characterized by morphological, molecular (16 S rRNA) and phenotypic (enzymatic activities) methods. Isolate’s colonies showed a color ranging from whitish, brownish, yellow, green, black, pink-purple and orange, similar to actinobacterial morphology. Analysis of the 16 S rRNA gene sequences of the isolates showed that they belong to the phylum Actinobateria, Specifically the genera Streptomyces, Nocardioides, Arthrobacter, Kocuria and Paenarthrobacter genera with the prevalence of Streptomyces members such as S. albidochromogenes and S. neopeptinius. The analysis of enzymatic profiles, showed that actinobacterial isolates represent a promising source of enzymes with potential biotechnological applications including amylases, CMCase, pectinases, xylanases and laccases.
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Data Availability
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- SCA:
-
Starch casein agar
- TE solution:
-
Tris EDTA solution
- EDTA:
-
Ethylenediaminetetraacetic Acid
- PCR:
-
Polymerase chain reaction
- ITS:
-
Internal Transcribed Spacers
- UPGMA:
-
Unweighted Pair Group Method with Arithmetic mean
- NCBI:
-
National Centre for Biotechnology Information
- BLAST:
-
Basic local alignment search tool
- MEGA program:
-
Molecular Evolutionary Genetics Analysis program
- CMC:
-
Carboxymethyl cellulose
- CMCase:
-
Carboxymethyl cellulase
- 2,4-DNP:
-
2,4-dinitrophenol
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The study was supported by the Ministry of Higher Education and Scientific Research of the Tunisian Republic and the Tunisia/South Africa bilateral project (grant agreement No. 95364).
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Hamdi, C., Arous, F., Boudagga, S. et al. Actinobacteria isolated from Tunisian forest soils show high diversity and biotechnological potential. Biologia 78, 3653–3665 (2023). https://doi.org/10.1007/s11756-023-01515-2
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DOI: https://doi.org/10.1007/s11756-023-01515-2