(Loranthaceae) is a hemiparasitic plant growing on (Fabaceae). The chemical investigation of its leaves and flowers led to the isolation of one new phenolic compound namely (-)-brunneusine (), together with 13 known compounds. The crude leaves and flowers extracts (CLE and CFLE) with their ethyl acetate fractions (EAFL and EAFFL) and some isolated compounds (; and ) have been tested on four bacterial species of sanitary importance isolated in an aquatic environment. All the samples except compound showed antibacterial activity with MICs ranging from 0.43 to 8.88.10 µg/mL and MBCs from 0.43 to 3.55.10 µg/mL. Compounds and showed better activity on all bacterial species tested with MICs ranging from 0.43 to 27.77 µg/mL. Only CLE, EAFL and compounds , , and showed bactericidal effects on all bacterial species tested.
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http://dx.doi.org/10.1515/znc-2021-0143 | DOI Listing |
BMC Genomics
January 2025
Department of Food, Bioprocessing, & Nutrition Sciences, North Carolina State University, Raleigh, NC, USA.
Background: The advent of next generation sequencing technologies has enabled a surge in the number of whole genome sequences in public databases, and our understanding of the composition and evolution of bacterial genomes. Besides model organisms and pathogens, some attention has been dedicated to industrial bacteria, notably members of the Lactobacillaceae family that are commonly studied and formulated as probiotic bacteria. Of particular interest is Lactobacillus acidophilus NCFM, an extensively studied strain that has been widely commercialized for decades and is being used for the delivery of vaccines and therapeutics.
View Article and Find Full Text PDFCurr Microbiol
January 2025
Jiangsu Longhuan Environmental Science Co. LTD, Changzhou, 213164, China.
A bacterial strain P1, capable of degrading diesel and converting thiosulfate to sulfate was isolated from an oil-contaminated soil sample. The cells were Gram-stain-negative, slightly curved rods and motile with a single polar flagellum. Growth of the strain was observed at 4-45 °C (optimum at 28 °C), at pH 4.
View Article and Find Full Text PDFNat Microbiol
January 2025
Biozentrum, University of Basel, Basel, Switzerland.
For any organism, survival is enhanced by the ability to sense and respond to threats in advance. For bacteria, danger sensing among kin cells has been observed, but the presence or impacts of general danger signals are poorly understood. Here we show that different bacterial species use exogenous peptidoglycan fragments, which are released by nearby kin or non-kin cell lysis, as a general danger signal.
View Article and Find Full Text PDFNat Microbiol
January 2025
Department of Integrative Biology, The University of Texas at Austin, Austin, TX, USA.
Ecology and evolution are considered distinct processes that interact on contemporary time scales in microbiomes. Here, to observe these processes in a natural system, we collected a two-decade, 471-metagenome time series from Lake Mendota (Wisconsin, USA). We assembled 2,855 species-representative genomes and found that genomic change was common and frequent.
View Article and Find Full Text PDFNat Commun
January 2025
Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.
The extensive application of graphene nanosheets (GNSs) has raised concerns over risks to sensitive species in the aquatic environment. The humic acid (HA) corona is traditionally considered to reduce GNSs toxicity. Here, we evaluate the effect of sorbed HA (GNSs-HA) on the toxicity of GNSs to Gram positive Bacillus tropicus.
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