Actinobacteria as Promising Candidate for Polylactic Acid Type Bioplastic Degradation.

Natthicha Butbunchu,Wasu Pathom-Aree

doi:10.3389/fmicb.2019.02834

Abstract

Polylactic acid (PLA) is one of the most commercially available and exploited bioplastics worldwide. It is an important renewable polymer for the replacement of petroleum-based plastic materials. They are both biodegradable and bio-based plastic. Microbial degrading activity is a desirable method for environmental safety and economic value for bioplastic waste managements. Members of the phylum actinobacteria are found to play an important role in PLA degradation. Most of the PLA degrading actinobacteria belong to the family Pseudonocardiaceae. Other taxa include members of the family Micromonosporaceae, Streptomycetaceae, Streptosporangiaceae, and Thermomonosporaceae. This mini-review aims to provide an overview on PLA degrading actinobacteria including their diversity and taxonomy, isolation and screening procedures and PLA degrading enzyme production from 1997 to 2019. Consideration is also given to where to sampling and how we might use these beneficial actinobacteria for PLA waste management.

Highlights

Plastics are polymeric materials widely used globally with an important role in everyday life
The first report dealing with the purification of a poly(L-lactic acid) degrading enzyme was purified from mesophilic actinobacteria, Amycolatopsis sp. strain 41 with a molecular weight of 40 kDa (Pranamuda et al, 2001)
This mini-review provides evidence to support the view that actinobacteria are potential Polylactic acid (PLA) degrading microorganisms

Summary

Introduction

Plastics are polymeric materials widely used globally with an important role in everyday life. Many PLA degrading actinobacteria were isolated from various environmental samples by dilution spread plate on emulsified PLA agar using this approach including a novel species, Amycolatopsis oliviviridis (Table 1). Amycolatopsis thailandensis CMU-PLA07T has been successfully isolated from natural park soil sample in northern Thailand using this approach (Chomchoei et al, 2011).

Results

Conclusion