Differences in bacterial functional profiles from loamy sand and clay loam textured soils under fungicide QuadrisR impact

By

Petkova, Michaella
Kenarova, Anelia
Boteva, Silvena
Georgieva, Stela
Chanev, Christo
Radeva, Galina

Type

Article

Date of Publication

2022-4-21

Original Publication

BioRisk : biodiversity & ecosystem risk assessment

Volume

17

Pages

31--43

Subjects

Average well colour development , community-level physiological profiling , fungicide azoxystrobin , QuadrisR , soil bacterial communities

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft

Identifiers

DOI: https://doi.org/10.3897/biorisk.17.76939

 

Abstract

The non-target effect of the fungicide QuadrisR on the bacterial community from grassland loamy sand (LS) and cropland clay loam (CL) soils with unknown history of fungicide usage was investigated. QuadrisR was applied to soil mesocosms at 0.0 mg kg-1 (Az0), 2.90 mg kg-1 (Az1), 14.65 mg kg-1 (Az2) and 35.0 mg kg-1 (Az3) calculated towards the active ingredient azoxystrobin (Az). Response of bacterial communities to QuadrisR was investigated during a 120-day incubation experiment, evaluating the shifts in bacterial catabolic profiles by the community-level physiological profiling (CLPP) technique and Biolog EcoPlatesTM method. QuadrisR decreased the overall catabolic activity (AWCD) of soil bacterial communities and the rate of decrease was independent of soil type and fungicide concentration. Fungicide affected negatively the utilisation of amines and positively that of amino acids in both soil types, whereas the effects on other carbon guilds (carbohydrates, carboxylic acids and polymers) corresponded closely to the respective soil type and fungicide concentration. Results indicated the presence of non-target effects of QuadrisR on bacterial functioning; hence, it is important to address the fungicide side-effects on soil health.