Isolation and molecular identification of moderate halophilic enzyme-producing bacteria
Hassan, G., Abdelal, G., Hemeda, N., Eissa, E. (2025). Isolation and molecular identification of moderate halophilic enzyme-producing bacteria. EKB Journal Management System, 3(1), 12-20. doi: 10.21608/ifjsis.2024.307199.1084
Gamal Hassan; Gehad Abdelal; Nada Hemeda; Eissa Eissa. "Isolation and molecular identification of moderate halophilic enzyme-producing bacteria". EKB Journal Management System, 3, 1, 2025, 12-20. doi: 10.21608/ifjsis.2024.307199.1084
Hassan, G., Abdelal, G., Hemeda, N., Eissa, E. (2025). 'Isolation and molecular identification of moderate halophilic enzyme-producing bacteria', EKB Journal Management System, 3(1), pp. 12-20. doi: 10.21608/ifjsis.2024.307199.1084
Hassan, G., Abdelal, G., Hemeda, N., Eissa, E. Isolation and molecular identification of moderate halophilic enzyme-producing bacteria. EKB Journal Management System, 2025; 3(1): 12-20. doi: 10.21608/ifjsis.2024.307199.1084

Isolation and molecular identification of moderate halophilic enzyme-producing bacteria

Labyrinth: Fayoum Journal of Science and Interdisciplinary Studies
Volume 3, Issue 1, June 2025, Page 12-20  XML PDF (847.02 K)
Document Type: Original full papers (regular papers)
DOI: 10.21608/ifjsis.2024.307199.1084
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Authors
Gamal Hassan email orcid 1; Gehad Abdelal2; Nada Hemeda3; Eissa Eissa4
1Genetics department, Faulty of Agriculture, Fayoum University, Egypt
2Department of Genetics, Faculty of Agriculture, Fayoum University, Egypt,
3GenetDepartment of Genetics, Faculty of Agriculture, Fayoum University, Egyptics department, Faculty of Agriculture, Fayoum University , Egypt
4Department of Genetics, Faculty of Agriculture, Fayoum University, Egypt
Abstract
The production of industrially relevant monomeric subunits from the hydrolysis of 1-4linkages in cellulose is catalyzed by cellulase applications for cellulases can be found in the food and feed textile brewing washing and pulp and paper industries the need for cellulases that can endure extreme circumstances related to pH, temperature and salinity is constant in these sectors. Thus, newly identified halophilic bacteria that produce halotolerant cellulose was presented in this study. cellulase 10 isolates of moderate halophiles bacteria were isolated from different samples collected from Qarun lake Fayoum Egypt. However, only five isolates S1, S2, S3, S4 and S5 showed highest cellulolytic activity were chosen for further analysis. The optimum conditions of maximum cellulase production were following 35ºC, pH 9, 15 NaCl and 3 days culture age respectively. The isolates exhibiting the greatest level of cellulase activity ranged in enzyme activity from 1.039 to 1.398 U/ml. It came to light that the majority of the halophilic isolates were Gram-negative and that their coloring varied from creamy white to yellow. Based on their 16S rRNA gene sequences, the S4 isolate was identified as Halomonas eurihaalin.
Keywords
Saline environment; Halophilic bacteria; Cellulose; 16S rRNA
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