Siberian Federal University

Issue

Journal of Siberian Federal University. Biology. 2015 8 (2)

Authors

Prudnikova, Svetlana V.; Boyandin, Anatoly N.; Karpov, Valery A.; Thị Mỹ Hiệp, Lê; Filichev, Nikolay L.; Gitelson, Iosif I.

Contact information

Prudnikova, Svetlana V.:Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia; E-mail: ; Boyandin, Anatoly N.:Siberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia; Institute of Biophysics SB RAS 50/50 Akademgorodok, Krasnoyarsk, 660036, Russia; Karpov, Valery A.:A.N. Severtsov Institute of Ecology and Evolution of RAS 33 Leninskij, Moscow, 119071, Russia; Thị Mỹ Hiệp, Lê:The Joint Russian-Vietnam Tropical Research and Test Center 30 Nguyễn Thiện Thuật, Tân Lập, Nha Trang, Khánh Hoà, Việt Nam; Filichev, Nikolay L.:The Joint Russian-Vietnam Tropical Research and Test Center 30 Nguyễn Thiện Thuật, Tân Lập, Nha Trang, Khánh Hoà, Việt Nam; Gitelson, Iosif I.:Institute of Biophysics SB RAS 50/50 Akademgorodok, Krasnoyarsk, 660036, Russia

Keywords

biodegradable polymers; polyhydroxyalkanoates (PHAs); biodegradation; degrading microorganisms

Abstract

The biodegradation patterns of different polyhydroxyalkanoates (PHAs) was studied in freshwater tropical reservoirs of South Vietnam (Nha Trang), in an artificial still water reservoir and in running water of the River Kai. It was revealed the weight loss profiles of films and pellets in the River Kai did not depend on the chemical structure of the polymer samples; poly(3-hydroxybutyrate) and a copolymer of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) degraded with the same intensity. The weight loss of homopolymer samples was faster in artificial reservoir. The study of the taxonomic variety of microorganisms in the fouling films of polymer samples showed differences in the dominant communities of PHA-degrading microorganisms. Among other organotrophs the proportion of PHAdepolymerase synthesizing bacteria was higher in the River Kai and ranging from 7 to 17 % in different samples, in spite of that the taxonomic variety of PHA-degrading bacteria was less diverse. The PHAdegrading community of the River Kai was represented by Bacillus, Acinetobacter and Streptomyces, from artificial reservoir samples Bacillus, Pseudomonas, Corynebacterium, Mycobacterium and Actinobacteria was isolated. The PHA-degrading fungi – Aspergillus candidus and Verticillium alba – were found only in the artificial reservoir

Pages

187-198

Paper at repository of SibFU

https://elib.sfu-kras.ru/handle/2311/19749

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).