Microbial Degradation of Poly-3-Hydroxybutyrate in Samples of Agrogenically Changed Soils

Abstract

Degradation of poly-3-hydroxybutyrate (P3HB) under laboratory conditions was investigated in field and garden soils with different structure of microbial communities. In the vegetable garden soil with a high content of nutrients the total number of organotrophic bacteria and micromycetes was significantly higher than in field soil. The differences in microbial communities of soil samples were estimated. Domination of actinobacteria of Arthrobacter and Corynebacterium genera was found in field soil. In the vegetable garden soil representatives of the genera Bacillus, Micrococcus, Corynebacterium and Pseudomonas dominated. Microbial composition of both soils was changing during the exhibition of P3HB films, with increasing the number of Gram-negative rods. The rate of biodegradation of P3HB film samples in garden soil was 1.5-1.7 times higher then in field soil

Keywords

• polyhydroxyalkanoates (PHA)
• poly-3-hydroxybutyrate (P3HB)
• biodegradation
• degrading microorganisms
• agrogenically changed soils