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This work was financially supported by the Ministry of Science and Higher Education,
Poland, under the research project number WZ/WB-II´S/6/2022.
Grant MNiSW nr. WZ/WB-IIŚ/6/2022.
The aim of this study was to assess the effect of Pseudomonas fluorescens (P) application on
isofetamid (IS) dissipation; the number of specific genes of archaea, bacteria and ammonia-oxidizing
bacteria (AOB); and the activity of β-Glucosidase, phosphomonoesterase, N-acetyl-glucosaminidase
and arylsulfatase. It was observed that the IS concentration was lower in the P+IS than in IS
throughout the entire study period, which indicates the potential of P. fluorescens to decompose
isofetamid faster. IS+P application significantly influenced N-acetyl-glucosaminidase, arylsulfatase
and phosphomonoesterase activity in soil compared to the control by approximately 29%, 72% and
6.5%, respectively. Moreover, it was observed that on day 21 in IS+P, the number of bacterial genes was
significantly higher than in the control and IS and than on day 1, by 10% and 20%, respectively. On
day 21, the number of archaea was significantly higher in all variants and ranged from 3.61 (control)
to 6.88 log10 gene copies/g dm (IS+P). Correlation analysis showed a positive correlation between IS
and TOC, while there was a negative correlation between IS and β-Glu and the number of archaea and
AOB genes. The tested strain has the potential to be a biofertilizer and an agent in the bioremediation
of contaminated soils.
