Abstract Projections of global rice yields account for climate change. They do not, however, consider the coupled stresses impending change and arsenic in paddy soils. Here, we show a greenhouse study that future conditions cause greater proportion pore-water arsenite, more toxic form arsenic, rhizosphere Californian Oryza sativa L. variety M206, grown on soil. As result, grain decrease by 39% compared to at today’s soil concentrations. In addition, climatic nearly twofold increase inorganic...

In order to assess the importance of nitratedependent Fe(II) oxidation and its impact on growth physiology dominant Fe oxidizers, we counted these bacteria in freshwater lake sediments studied their physiology. Most probable number counts nitratereducing Fe(II)oxidizing sediment Lake Constance, a Southern Germany, yielded about 105 cells mL−1 total heterotrophic bacteria, with 1% (103 mL−1) oxidizers. We investigated Acidovorax sp. strain BoFeN1, mixotrophic oxidizer isolated from this...

ABSTRACT The remediation of metal-contaminated soils by phytoextraction depends on plant growth and metal accessibility. Soil microorganisms can affect the accumulation metals plants either directly or indirectly stimulating activity (im)mobilizing and/or complexing metals. Understanding intricate interplay metal-accumulating with their rhizosphere microbiome is an important step toward application optimization phytoremediation. We compared effects a “native” strongly disturbed...

Fe(III) (oxyhydr)oxides affect the mobility of contaminants in environment by providing reactive surfaces for sorption. This includes toxic metal cadmium (Cd), which prevails agricultural soils and is taken up crops. Fe(III)-reducing bacteria can mobilize such mineral dissolution or immobilize them sorption to coprecipitation with secondary Fe minerals. To date, not much known about fate mineral-associated Cd during microbial reduction. Here, we describe isolation a new Geobacter sp. strain...

Cadmium (Cd) is of environmental relevance as it enters soils via Cd-containing phosphate fertilizers and endangers human health when taken up by crops. Cd known to associate with Fe(III) (oxyhydr)oxides in pH-neutral slightly acidic soils, though not well understood how the interrelation Fe changes under Fe(III)-reducing conditions. Therefore, we investigated mobility a Cd-bearing soil faced organic carbon input reducing Using fatty acid profiles quantitative PCR, found that both fermenting...

Fe(III) (oxyhydr)oxide minerals exhibit a high sorption affinity for arsenic (As) and the reductive dissolution of As-bearing (oxyhydr)oxides is considered to be primary mechanism As release into groundwater. To date, research has focused on reactivity abiogenic (oxyhydr)oxides, yet in nature biogenic precipitated by Fe(II)-oxidizing bacteria are also present. These biominerals contain cell-derived organic matter (CDOM), leading different properties than their counterparts. Here, we follow...

The dissolution of arsenic-bearing iron(III) (oxyhydr)oxides during combined microbial and arsenate(V) reduction is thought to be the main mechanism responsible for arsenic mobilization in reducing environments. Besides its bioreduction, often resequestered by newly forming secondary iron(II)-bearing mineral phases. In phosphate-bearing environments, iron(II) inputs generally lead vivianite precipitation. fact, a previous study we observed that bioreduction arsenate(V)-bearing biogenic...

Natural organic matter (NOM) is known to affect the microbial reduction and transformation of ferrihydrite, but its implication toward cadmium (Cd) associated with ferrihydrite not well-known. Here, we investigated how Cd redistributed when undergoes in presence NOM. Incubation Geobacter sulfurreducens showed that both rate extent Cd-loaded were enhanced by increasing concentrations NOM (i.e., C/Fe ratio). Without NOM, only 3–4% Fe(III) was reduced, around 61% preadsorbed released into...

Prenatal and early childhood lead exposures impair cognitive development. We aimed to evaluate the prevalence of elevated blood levels (BLLs) among pregnant women in rural Bangladesh identify sources exposure. analyzed BLLs 430 randomly selected from communities central Bangladesh. Fifty-seven cases were with highest BLLs, ≥ 7 μg/dL, 59 controls lowest < 2 μg/dL. An exposure questionnaire was administered soil, rice, turmeric, water, traditional medicine, agrochemical, can samples for...

We compared the response at neutral pH of some denitrifiers to different electron donors such as reduced sulfur (pyrite, S(0), and marcasite) Fe. Chemolithoautotrophic oxidation pyrite with nitrate acceptor was not possible when in a pure crystalline form, whereas synthesized FeS2 low crystallinity S(0) possible. Neither nitrite nor sulfate formed Fe(II)-oxidizing strain Acidovorax sp. BoFeN1 tested. Microbial reduction appears be induced via S but Fe oxidation.

Abstract Climate change and metals independently stress soil microbiomes, but their combined effects remain unresolved. Here we show that future climate affects cadmium through altered microbiome nutrient cycles, with pH as critical factor. In soils pH&lt;7 during summer temperatures, increased porewater cadmium, shifting total potentially active taxonomic structures. Microbial ammonium oxidation released protons liberating cation exchange from mineral surfaces. When levels became toxic to...

<title>Abstract</title> In addition to food quantity, quality is paramount for meeting the demands of a growing global population. Food encompasses both nutritional and contaminant contents, yet their transfer within soil-crop systems remains poorly understood under impending climate change. This greenhouse study first demonstrate that future climatic conditions increase metals from oxic soils crops, showcased four soil-spinach variety combinations (<italic>Spinacia oleracea</italic>)....

The majority of soil carbon resides in mineral-associated organic matter (MAOM) most soils. MAOM is assumed to be relatively inert environmental change because it protected from microbial activity thus contributing substantially storage. However, plants and associated microbes may destabilize through mineral dissolution exchange reactions the rhizosphere, potentially causing loss. Here, we quantified magnitude destabilization rhizosphere response extreme precipitation dynamics expected with...

Climate change is project to greatly affect food systems, including yield and quality of staple crops such as wheat. One key determinant wheat grain the concentration metal micronutrients (e.g., Fe, Zn, Cu) toxic elements Cd, Pb). However, it not yet known whether which degree climate conditions will micronutrient element concentrations in grains. We performed a wheat-growth pot experiment (Spring-Summer 2024) determine effect future climatic (approximately +4&amp;#176;C relative ambient,...

Cadmium (Cd) contamination in agricultural soils raises concerns due to its toxicity and mobility the soil-plant system. A recent soil incubation study found that future climate conditions may further increase Cd [1], but resulting consequences for transfer plants human food chain remain unknown.Here, we investigate impact of change on accumulation by spinach (Spinacia oleracea), chosen as a model plant leafy crops. Spinach is recognized significant source essential micronutrients yet it...

With thawing, permafrost soils can shift from dry, oxic conditions to wetlands, driving significant changes in soil biogeochemistry and plant community composition, ultimately altering climate-relevant greenhouse gas (GHG) dynamics. Graminoid species, such as Carex spp. Eriophorum spp., thrive anoxic soils, exhibit high primary productivity, release substantial amounts of organic root exudates fueling CO2 CH4 emissions, possess adaptive traits for anoxia. Among these is the formation...

Climate change, marked by rising atmospheric CO&amp;#8322; levels and temperature, can strongly influence soil processes such as nutrient cycling microbial dynamics. Metals negatively impact functionality, modify community composition activity, introducing additional complexity to under shifting environmental conditions. In addition, metals disrupt plant growth uptake, affect root development trigger stress responses, ultimately compromising productivity. On the other hand, elevated...

Millions of people worldwide are affected by As (arsenic) contaminated groundwater. Fe(III) (oxy)hydroxides sorb efficiently and therefore used in water purification filters. Commercial filters containing abiogenic (GEH) showed varying removal, it was unclear whether Fe(II)-oxidizing bacteria influenced filter efficiency. We found up to 107 bacteria/g dry-weight GEH-filters determined the performance material presence absence bacteria. GEH-material sorbed 1.7 mmol As(V)/g Fe ∼8 times more...

Abstract Mechanized biochar field application remains challenging due to biochar’s poor flowability and bulk density. Granulation of with fertilizer provides a product ready for well-established machinery. However, it’s unknown whether granulated biochar-based fertilizers (gBBF) are as effective co-application non-granulated fertilizer. Here, we compared gBBF mineral compound (control), that was co-applied at rate 1.1 t ha −1 the in white cabbage greenhouse pot trial. Half pots received...