ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Sangita Saha1-3, Hiran Kanti Santra3, Sandip Chattopadhyay2 and Debdulal Banerjee1,3
1Centre for Life Sciences, Vidyasagar University, Midnapore, West Bengal, India.
2Cellular and Molecular Toxicology Laboratory, Department of Biomedical Laboratory Science and Management, Vidyasagar University, Midnapore, West Bengal, India.
3Microbiology and Microbial Biotechnology Laboratory, Department of Botany and Forestry, Vidyasagar University, Midnapore, West Bengal, India.
Article Number: 9955 | © The Author(s). 2024
J Pure Appl Microbiol. 2024;18(4):2911-2924. https://doi.org/10.22207/JPAM.18.4.63
Received: 03 October 2024 | Accepted: 13 November 2024 | Published online: 27 November 2024
Issue online: December 2024
Abstract

This study investigated the exopolysaccharide (EPS) producing ability of an endophytic fungus GloS2. It involved examining various aspects, including identifying and cultivating endophytic fungi, producing and characterizing EPS, optimizing the production process, and evaluating their antioxidant properties. The fungus GloS2 (Fusarium sp.) was optimized for EPS synthesis through one variable at a time (OVAT) and response surface methodology (RSM) to determine the optimal culture environment and growth medium components, resulting in the maximum EPS production of 5.39 gL-1. Furthermore, the EPS exhibited significant antioxidant activity with a greater IC50 value (15.05 ± 0.51 µg mL-1) in the hydroxyl radical scavenging assay. The Fourier Transform Infrared Spectral analysis indicates the presence of chemical groups i.e., O-H, C-H, C-O-H, and C-O. Additionally, gas chromatography-mass spectrometry (GC-MS) analysis revealed that erythrose, fructose, and mannose were the major monosaccharide components, with a molar proportion of nearly 1:1:1 and a molecular mass of ~1.12 x 105 Da. Moreover, the structural characterization of EPS has confirmed the existence of α-glycosidic linkage along with β-D-galactopyranosyl moieties and substituted glucose residues.

Keywords

Endophytic Fungi, Heteropolysaccharide, Process Optimization, in vitro Antioxidant

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