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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2016.5(7): 1-18
DOI: http://dx.doi.org/10.20546/ijcmas.2016.507.001


Evaluation of Chlorpyrifos Tolerance and Degradation by Non-Toxigenic Aspergillus Section Flavi Strains Isolated from Agricultural Soils
Cecilia Soledad Carranza1,3*, Melisa Eglé Aluffi1,3, Carla Lorena Barberis1,2
and Carina Elizabeth Magnoli1,2
 1Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Físico,
Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional Nº 36 Km 601 (5800) Río Cuarto, Córdoba, Argentina
2Member of the Research Career of CONICET, Argentina
3Fellowship of CONICET, Argentina
*Corresponding author
Abstract:

This study was conducted to evaluate the in vitro tolerance, utilization and degradation of chlorpyrifos by non-toxigenic Aspergillus section Flavi strains natives of agricultural soils. The tolerance assay showed that all strains were able to grow at the highest insecticide concentration (700 mg L-1). In media supplied with chlorpyrifos, the highest values of growth rate were observed in the full CzapekDox medium (CZ) (7.2 to 8 mm day-1) and the lowest values were registered in the medium where the insecticide replaced the carbon source (CZC) (3.6 to 4.4 mm day-1). In media where the insecticide replaced the nitrogen (CZN) and phosphorous (CZP) source, the values of growth rate were significantly higher than in CZC and lower than in CZ. Degradation assays showed that the degradation percentage was 75% at 0.98 and 0.95 of water activity, in all concentrations (1753, 3506 and 7012 mg L-1). A fast decrease of chlorpyrifos was observed within the first day of incubation, and then the biodegradation rate decreased over time. This study provides evidence on the effective growth ability and degradation of no-toxigenic Aspergillus section Flaviin presence of high chlorpyrifos concentrations and under optimal growth conditions (aW and temperature).


Keywords: Chlorpyrifos, Aspergillus section Flavi, tolerance, degradation
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How to cite this article:

Cecilia Soledad Carranza, Melisa Eglé Aluffi, Carla LorenaBarberis and Carina Elizabeth Magnoli. 2016. Evaluation of Chlorpyrifos Tolerance and Degradation by Non-Toxigenic Aspergillus Section Flavi Strains Isolated from Agricultural Soils.Int.J.Curr.Microbiol.App.Sci. 5(7): 1-18. doi: http://dx.doi.org/10.20546/ijcmas.2016.507.001