Grassland fire, as an important ecological factor, is quite influential in determining the structural and functional stability of ecosystem. In this work, the fire-induced changes on the vegetation and soil microbial community were studied in alpine meadow. Microbial community composition was assessed by phospholipid fatty acid (PLFA) analysis, and functional diversity was determined by Biolog ...

The fate and impact of Alcaligenes faecalis strain A1501R, a rifampicin-resistant derivative of a rice inoculant strain, were studied in flooded silt loam microcosms planted with rice seedlings. Selective plating revealed that strain A1501R survived at high, initially stable and later slowly declining population sizes (108–106 CFU per gram of dry soil), for 60 days. Inoculant survival in the ri...

The aim of the present study was to describe the identification and characterization (physiological properties) of two strains of lactic acid bacteria (LAB 18 and 48) present in a commercial probiotic culture, FloraMax(®)-B11. Isolates were characterized morphologically, and identified biochemically. In addition, the MIDI System ID, the Biolog ID System, and 16S rRNA sequence analyses for ident...

Lead (Pb) pollution is one of the most widespread and harmful environmental problems worldwide. Determination changes in soil properties microbial functional diversity due to land use needed establish a basis for remediation pollution. This study aimed investigate soils contaminated by Pb from different sources analyze metabolism communities using Biolog technology. (>300 mg kg−1) significantly...

Pseudomonas fluorescens SBW25 is capable of growing on histidine as a sole source of carbon and/or nitrogen. Previous work showed that the two-component regulatory system CbrAB is required for expression of the histidine utilization (hut) locus when histidine is the sole source of carbon and nitrogen. Here, using mutational analysis and transcriptional assays, we demonstrate involvement of a se...

Pseudomonas aeruginosa (Pae) is a clinically important opportunistic pathogen. Herein, we demonstrate that the PA1006 protein is critical for all nitrate reductase activities, growth as a biofilm in a continuous flow system, as well as virulence in mouse burn and rat lung model systems. Microarray analysis revealed that ΔPA1006 cells displayed extensive alterations in gene expression including ...