Here, we describe the metagenome and functional composition of a microbial community in a historically metal-contaminated tropical freshwater stream sediment. The sediment was collected from the Mina Stream located in the Iron Quadrangle (Brazil), one of the world's largest mining regions. Environmental DNA was extracted and was sequenced using SOLiD technology, and a total of 7.9 Gbp was produ...

Mountain forests in National park Bohemian Forest (Czech Republic) were affected by bark beetle attack and windthrows in 2004-2008, followed by an extensive tree dieback. We evaluated changes in the biochemistry of the uppermost soil horizons with the emphasis on carbon (C) and nitrogen (N) cycling in a near-natural spruce (Picea abies) mountain forest after the forest dieback, and compared it ...

A plant growth promoting bacterial endophyte designated as AL2-14B isolated from the leaves of Achyranthes aspera L. was identified as Pseudomonas aeruginosa based on its phenotypic and physiological features, and 16S rRNA gene sequence analysis. AL2-14B had plant growth stimulating attributes including siderophore and indole acetic acid release, inorganic phosphate solubilization, along with n...

The aim of the study was to demonstrate the impact of soil agricultural usage on the abundance of ammonifying bacteria (AB) and their activity, expressed as arginine ammonification (AA). Five agriculturally exploited types of soils (FAO): Haplic Luvisol, Brunic Arenosol, Mollic Gleysol, Eutric Fluvisol, and Rendzina Leptosol were studied. The controls were non-agricultural soils of the same typ...

Holobionts are species-specific associations between macro- and microorganisms. On coral reefs, the benthic coverage of coral and algal holobionts varies due to natural and anthropogenic forcings. Different benthic macroorganisms are predicted to have specific microbiomes. In contrast, local environmental factors are predicted to select for specific metabolic pathways in microbes. To reconcile ...

The behavior of magnesium is of special interest since in studies on antagonism magnesium has been found to occupy an intermediate position between the monovalent and the bivalent metals. In many cases it can act as an antagonist to calcium as well as to sodium. As no investigations on respiration have been undertaken from this point of view, the writer has made some experiments on this subject...

This paper aims at monitoring the improvement of sandy soil properties with biocementation through microbially induced calcite precipitation (MICP) method reaction accelerations by self-developed soybean urease enzymes. In this study, concentration calcium ions (Ca2+ as CaCl2) is varied 50, 100, 250, and 500 mM to determine an optimum shear strength. The enzymes 20% volume (v/v) are used accele...

Diverse microorganisms drive biogeochemical cycles and consequently influence ecosystem-level processes in alpine peatlands, which are vulnerable to extreme drought induced by climate change. However, there few reports about the effects of on microbial function. Here we identify functional genes associated with carbon nitrogen metabolisms experiments that occurred at different periods plant gro...

Nitrogen is an indispensable and limiting element for plant microbial growth. To investigate the combined effects of salinity freezing–thawing (FT) processes on soil inorganic nitrogen (SIN) transformation in seasonally freezing salinized farmland, laboratory incubation experiments were conducted under five salt content (SSC) treatments (0.08%, 0.25%, 0.35%, 0.50%, 0.70%), four FT temperature (...

Symbiont relationships between corals and photosynthetic microorganisms sustain coral reef existence. However, the Great Amazon Reef System (GARS) stays under a plume layer that attenuates entry of light, instead corals, sponges are major epifauna, for which little is known about function associated microbiome. Here, we used genome-resolved metagenomics to investigate how sponge microbiome supp...