EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Enhanced degradation of isoproturon in an agricultural soil by a Sphingomonas sp. strain and a microbial consortium


Chemosphere (): -
Enhanced degradation of isoproturon in an agricultural soil by a Sphingomonas sp. strain and a microbial consortium
NlmCategory="UNASSIGNED">Isoproturon (IPU) degradation in an agricultural soil inoculated with an isolated IPU-degrader strain (Sphingomonas sp. strain AK1, IS) or a microbial consortium (MC) harboring this strain, with or without carrier material, were investigated in soil microcosm experiments during 46 days. Effect of the carrier material and inoculation size on IPU-degradation efficacy of the inoculants were studied. Mineralization, extractable residues and non-extractable residues of 14C-labeled IPU were analyzed. The low IPU mineralization in untreated soil (7.0%) was enhanced to different extents by inoculation of IS (17.4%-46.0%) or MC (58.9%-67.5%). Concentrations of IPU residues in soils amended with MC (0.002-0.095 μg g dry soil-1) were significantly lower than in soils amended with IS (0.02-0.67 μg g dry soil-1) and approximately 10 times lower than in the uninoculated soil (0.06-0.80 μg g dry soil-1). Less extractable residues and non-extractable residues were detected in soil with higher IPU mineralization. Inoculation size (as indicated by the volume of liquid cultures or by the number of carrier particles) determined the IPU-removal efficacy of IS in soil, but this effect was less pronounced for MC. The low sorption of IPU to soil and the decreasing IPU-mineralizing rates suggested incapability of IS to establish the IPU-mineralizing function in the soil. The thorough removal of IPU and persistent IPU-mineralizing activity of soil inoculated with MC indicated a high persistence of IPU-metabolic trait. Our results showed that microbial consortia might be more efficient than single degrader strains to enhance clean-up of organic chemicals in soil.


Accession: 057771311

PMID: 27817898

DOI: 10.1016/j.chemosphere.2016.10.084



Related references

Isolation and characterization of an isoproturon mineralizing Sphingomonas sp. strain SH from a French agricultural soil. Biodegradation 22(3): 637-650, 2011

Mineralization of soil-aged isoproturon and isoproturon metabolites by Sphingomonas sp. strain SRS2. Journal of Environmental Quality 32(4): 1250-1257, 2003

Isolation from agricultural soil and characterization of a Sphingomonas sp. able to mineralize the phenylurea herbicide isoproturon. Applied and Environmental Microbiology 67(12): 5403-5409, 2001

Genetic labelling and application of the isoproturon-mineralizing Sphingomonas sp. strain SRS2 in soil and rhizosphere. Letters in Applied Microbiology 43(3): 280-286, 2006

In-field spatial variability in the degradation of the phenyl-urea herbicide isoproturon is the result of interactions between degradative Sphingomonas spp. and soil pH. Applied and Environmental Microbiology 69(2): 827-834, 2003

Microbial Degradation of Chlorogenic Acid by a Sphingomonas sp. Strain. Applied Biochemistry and Biotechnology 179(8): 1381-1392, 2016

Microbial degradation of isoproturon and related phenylurea herbicides in and below agricultural fields. Fems Microbiology Ecology 45(1): 1-11, 2003

Superior survival and degradation of dibenzo-p-dioxin and dibenzofuran in soil by soil-adapted Sphingomonas sp. strain RW1. Applied Microbiology and Biotechnology 48(1): 109-114, 1997

Effects of modified Pb-, Zn- and Cd- availability in soil on microbial community and isoproturon degradation. FEMS Congress of European Microbiologists Abstract Book (1): 422, 2003

Augmentation of a Microbial Consortium for Enhanced Polylactide (PLA) Degradation. Indian Journal of Microbiology 56(1): 59-63, 2016