Journal of Basic Microbiology

Thu, 11/07/2019 - 03:18
Metals are among the most prevalent pollutants released into the environment. For these reasons, the use of biomarkers for environmental monitoring of individuals and populations exposed to metal pollution has gained considerable attention, offering fast and sensitive detection of chemical stress in organisms. There are different metal resistance genes in bacteria that can be used as biomarkers,...
Wed, 10/16/2019 - 03:21
The current research focuses on anaerobic respiration of arsenic and other toxic metals by purple nonsulfur bacteria (PNSB). Among the optimization assays performed were carbon utilization, cross metal resistance, and metal respiration, along with a comparison of each assay in photoheterotrophic and chemoheterotrophic growth. The bacteria were identified by the classification of 16S ribosomal RNA...
Thu, 10/03/2019 - 03:21
Salmonella enterica serovar Typhimurium (S. Tm) is a major intracellular pathogen that infects humans and animals, and its survival and growth in macrophages is essential for its pathogenicity. More than 50 putative regulatory proteins are encoded by the S. Tm genome, but the functions of these regulatory proteins in mediating S. Tm pathogenicity are largely unknown. In this study, we...
Fri, 09/27/2019 - 03:14
In the current study, psychrophilic, endolithic, and epilithic bacterial strains were isolated and characterized from the nonpolar Laohugou glacier (LHG) no. 12, the largest valley glacier in the western Qilian Mts. located on the northeastern edge of the Tibetan Plateau. Five different types of samples, rocks, soil, glacial water, ice/snow, and cryoconite, were collected. A total of 48 bacterial...
Thu, 09/26/2019 - 03:16
The yigP (ubiJ) locus has been shown to be associated with many phenotypic changes in Escherichia coli, while the individual function of its two products, EsrE small RNA and UbiJ protein, is still elusive. In this study, we constructed two single‐element mutants, EsrE mutant strain Mut and UbiJ mutant strain Ter, on the basis of the base substitution programs. The variable antibiotics resistance...
Mon, 09/23/2019 - 03:16
Quorum sensing (QS)‐mediated biofilm‐forming rhizobacteria are indispensable due to their competitiveness in the crop rhizosphere. In the present work, we have reported on the occurrence of diversified bacterial species capable of producing N‐acyl homoserine lactone (AHL) as the QS signal in the roots of a rice plant grown under field conditions. The AHL‐producing bacteria were directly isolated...
Mon, 09/23/2019 - 03:16
The aim of this study was to identify and characterize the SE‐P3, P16, P37, and P47 phages infecting Salmonella Enteritidis. Transmission electron microscopy analysis showed that the SE phages belonged to the Myoviridae or Siphoviridae family and had plaque sizes between 0.622 ± 0.027 and 1.630 ± 0.036 mm in diameter. sefC, pefA, spvC, sopE, and gipA virulent gene regions were absent in their...
Mon, 09/23/2019 - 03:16
The aim of this study was to examine four strains of two yeast species in relation to their capability for assimilating alkanes in the presence of heavy metals (HMs). The four strains tested were Candida pseudoglaebosa ENCB‐7 and Kodamaea ohmeri ENCB‐8R, ENCB‐23, and ENCB‐VIK. Determination was made of the expression of CYP52 genes involved in alkane hydroxylation. When exposed to Cu2+, Zn2+, Pb2...
Mon, 09/23/2019 - 03:16
This study investigates the effect of metals (cadmium, lead, mercury, and tellurium) and organic pollutants (benzene, diesel, lindane, and xylene) on a dinoflagellate—Prorocentrum sigmoides Böhm—and its associated culturable bacteria. Two bacterial cultures (Bacillus subtilis strain PD005 and B. xiamensis strain PD006) were isolated from P. sigmoides and characterized by scanning electron...
Mon, 09/23/2019 - 03:16
Heavy metals such as lead, chromium, and metalloid like arsenic dominate the pinnacle in posing a threat to life. Being environment‐friendly, elucidating the mechanism by which microorganisms detoxify such elements has always been an active field of research hitherto. In the present study, we have investigated the capability of nitrogen‐deprived Papiliotrema laurentii strain RY1 toward enhanced...
Mon, 09/23/2019 - 03:16
Metallothionein (MT) is a low‐molecular‐weight protein with a high metal binding capacity and plays a key role in organism adaptation to heavy metals. In this study, a metallothionein gene was successfully cloned and sequenced from Antarctic sea‐ice yeast Rhodotorula mucilaginosa AN5. Nucleotide sequencing and analysis revealed that the gene had four exons interrupted by three introns. MTs...
Mon, 09/23/2019 - 03:16
Removal of heavy metals from food material by growing micro‐organisms is limited by the toxicity to cells. In this study, different preincubation treatments were investigated to analyze their effects on cadmium resistance and removal ability of Pichia kudriavzevii A16 and Saccharomyces cerevisiae CICC1211. Sucrose preincubation improved the cadmium resistance of both yeast cells and increased the...