Biopolymers Produced by Lactic Acid Bacteria: Characterization and Food Application

Area of Science:

• Biotechnology and Materials Science
• Microbiology and Biochemistry

Background:

• Growing environmental concerns over non-biodegradable plastics necessitate sustainable alternatives.
• Circular economy principles drive research into biodegradable polymers from biological sources.
• Microorganisms, particularly lactic acid bacteria (LAB), are emerging as key producers of valuable biopolymers.

Purpose of the Study:

• To review LAB strains capable of producing exopolysaccharides (EPS), polylactic acid (PLA), and polyhydroxyalkanoates (PHAs).
• To correlate biopolymer characteristics with applications in the food industry and food packaging.
• To discuss cost-effective biosynthesis strategies for biopolymers.

Main Methods:

• Literature review of research on LAB strains and their biopolymer production capabilities.
• Analysis of characteristics of EPS, PLA, and PHAs produced by LAB.
• Examination of current and potential applications in food and packaging sectors.

Main Results:

• LAB are well-established producers of EPS; their potential for PLA and PHA production is increasingly recognized.
• Biopolymers from LAB offer biodegradability and can be derived from inexpensive biomass.
• Specific LAB strains possess unique metabolic pathways suitable for targeted biopolymer synthesis.

Conclusions:

• LAB represent a promising microbial platform for the sustainable biosynthesis of diverse biopolymers (EPS, PLA, PHAs).
• Optimizing production costs is crucial for the widespread industrial adoption of LAB-derived biopolymers.
• Further research into LAB strain selection and metabolic engineering can enhance biopolymer yield and properties for food and packaging applications.