Open AccessINFLUENCE OF SELECTIVE SUBSTRATE ON POLYCHLOROBIPHENYL-DEGRADATIVE ACTIVITY OF AEROBIC SOIL BACTERIAL ASSOCIATIONS
Author(s) -
Д. О. Егорова,
M. G. Pervova,
В. А. Демаков
Publication year - 2020
Publication title -
vestnik permskogo universiteta. seriâ biologiâ
Language(s) - English
Resource type - Journals
ISSN - 1994-9952
DOI - 10.17072/1994-9952-2020-4-294-302
Subject(s) - biphenyl , phthalate , substrate (aquarium) , polychlorinated biphenyl , biodegradation , naphthalene , chemistry , environmental chemistry , organic chemistry , biology , ecology
As a result of enrichment cultivation using ortho-phthalate, naphthalene or biphenyl as a selective factor, six aerobic bacterial associations were obtained. It was found that all associations, having reached a sta-ble composition, actively grow on a selective substrate. However, associations, isolated using ortho-phthalate as a selective factor, do not have the ability to use biphenyl as a carbon source. Associations R24, R63, R26 and R62 grow effectively in a mineral medoum with biphenyl, and also decompose com-mercial PCB mixtures by the classical pathway of biphenyl oxidation. The level of destruction of Trihlo-robiphenyl by these associations was 99.7 - 99.8%, and for Sovol - 99.6 - 99.8% in 8 days. At the same time, there was no significant difference in biodegradation indices between the R24 and R63 associations selected on biphenyl and the R26 and R62 associations isolated on naphthalene.