Production and characterization of bioemulsifier by Parapedobacter indicus

Area of Science:

• Microbiology
• Biotechnology
• Biochemistry

Background:

• The search for novel bioemulsifiers (BE) is crucial for various industrial applications.
• Microbial production of BE offers a sustainable alternative to synthetic emulsifiers.
• The genus Parapedobacter has not been previously investigated for bioemulsifier or siderophore production.

Purpose of the Study:

• To evaluate the potential of Parapedobacter indicus MCC 2546 for bioemulsifier (BE) production.
• To characterize the optimal conditions for BE production.
• To identify the nature of the produced BE and investigate siderophore production.

Main Methods:

• Screening for lipase activity, drop collapse test, and oil-spreading activity.
• Assessing emulsification activity and index under varying conditions (temperature, pH, NaCl concentration, substrate).
• Analyzing BE composition using Fourier transform infrared spectroscopy (FTIR) and determining surface tension reduction. Siderophore production was also assessed.

Main Results:

• Parapedobacter indicus MCC 2546 demonstrated significant lipase activity and emulsification potential.
• Optimal BE production occurred at 37°C, pH 7, 1% NaCl, in Luria Bertani broth after 72 hours using olive oil.
• The produced BE is protein-polysaccharide in nature (70% protein, 30% carbohydrate) and reduced surface tension. Catecholate siderophore production was also confirmed.

Conclusions:

• Parapedobacter indicus MCC 2546 is a novel source of bioemulsifier (BE) with significant emulsifying properties.
• The study establishes optimal conditions for BE production by this bacterium.
• This research is the first to report both bioemulsifier and siderophore production within the Parapedobacter genus, highlighting its biotechnological potential.