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Nitrogen Fertilizer Formulations Modulate the Yield-Cadmium Trade-Off in Rice Through Rhizosphere Processes and Translocation Nodes.

Cadmium (Cd) contamination in paddy soils represents a major risk to global food security and human health because Cd can readily enter the … owed intermediate responses. These responses were mainly associated with nitrogen-induced shifts in rhizosphere chemistry, especially changes in soil Cd availability linked to pH and exchangeable H+, although unmeasured redox-related processes may have also contributed under flooded conditions. Further analyses of internal Cd distribution and translocation, t …

Synthetic microbial community promotes seedling growth of Chinese fir via dissolving phosphorus and modifying rhizosphere microbial community.

Phosphorus (P) is an essential nutrient for plant growth, yet its availability in soil is severely constrained by fixation into insoluble fo … bsolute quantification 16S amplicon and metagenomic sequencing revealed that SynCom-P6 reshaped the rhizosphere bacterial community, enriching beneficial genera such as Massilia and Dyadobacter, and altered functional profiles, including upregulation of hormone signaling and nitrogen fixation related genes. These results demonstrated that the synthetic commun …

Antibiotic resistome patterns across wheat soil microdomains under cadmium exposure and their associations with rhizosphere metabolite profiles.

The co-contamination of heavy metals and antibiotic resistance genes (ARGs) poses an increasing challenge to agroecosystems, yet its relationships with rhizosphere metabolism and microbial communities remain poorly understood. We integrated metagenomic sequencing, untargeted metabolomics, and absolute qPCR in a wheat pot experiment to characterize resistome patterns across unplanted bulk soil (O), root-zone soil (PS), and rhizosphere soil (PR) under three Cd treatments. At the booting stage, observed ARG subtype richness and total TPM-normalized ARG abundance were higher in root-associated com…

A synthetic Bacillus compound agent enhances cotton yield and fiber quality by regulating rhizosphere microbes and metabolites.

To improve cotton yield and reduce reliance on chemical fertilizers and pesticides, we synthesized a novel compound microbial agent with cot … d by 7.35%, 7.48%, and 3.06%, respectively. Further analyses of nutrient contents in cotton leaves, rhizosphere soil physicochemical properties, amplicon sequencing, and untargeted metabolomics revealed that, compared with the control group: nitrogen (N), phosphorus (P), and potassium (K) contents in cotton leaves increased by 33.27%, 68.24%, and 37.76%, resp …

Streptomyces xingningensis sp. nov. and Streptomyces rhizosphaerae sp. nov. isolated from the rhizosphere soil of Camellia oleifera.

Two novel actinobacteria strains, designated YCB024T and YCB041T, were isolated from rhizosphere soil samples of Camellia oleifera collected from Xingning City, Guangdong Province, PR China. Both strains exhibited mycelial filaments and intertwined hyphal cells. Phylogenetic analysis revealed that strain YCB024T exhibited the highest 98.8% 16S rRNA gene similarity with Streptomyces yogyakartensis NBRC 100779T, Streptomyces javensis NBRC 100777T and Streptomyces violaceusniger NBRC 13459T, and strain YCB041T exhibited the highest 98.9% similarity with Streptomyces albospinus NBRC 13846T. The av…

Solanoeclepin C, a root-secreted molecule converted by rhizosphere microbes to hatching factors for potato cyst nematodes.

Eclepins are root-secreted compounds that induce the hatching of cyst nematodes. Solanoeclepin A (SEA) and B (SEB) have been isolated as potent hatching factors for potato cyst nematodes (PCNs). SEB is biosynthesized in roots, released into the rhizosphere, and converted into SEA by soil microorganisms. However, given that SEB and SEA exhibit comparable hatching-inducing activity toward PCNs, the ecological significance of microbial solanoeclepin metabolism in eclepin-mediated communication remains unclear. In this study, we identified solanoeclepin C (SEC), a previously unrecognized solanoecl…

Dahongpao mother tree affects soil microbial community and nutrient cycling by increasing rhizosphere soil characteristic metabolite content.

Cuttings are an important way of propagating tea trees (Camellia sinensis). In this study, Dahongpao mother tree (MD) and cutting Dahongpao (PD) were used as research objects and their rhizosphere soil were collected and performed metabolomics analysis. At the same time, soil nutrient content, microbial physiological indexes, and microbial carbon source utilization were determined, which in turn obtained the effect of cuttings on metabolites, microorganisms, and nutrient cycling in rhizosphere soil of tea trees. The results showed that available nitrogen, available phosphorus and available pot…

Manganese oxide application reduces cadmium bioavailability in rice rhizosphere: Insights from desorption kinetics and high-resolution imaging.

Cadmium (Cd) contamination in paddy soils threatens global food safety. While manganese (Mn)-based materials show promise in reducing soil Cd bioavailability, their efficacy requires further evaluation. Traditional ex situ sampling methods often overlook metal desorption kinetics and rhizosphere biochemical heterogeneity, potentially misinterpreting Mn's regulatory influence on Cd dynamics. This study employed in situ monitoring tools, including diffusive gradients in thin-films (DGT) measurements, DIFS (DGT-induced fluxes in soils) modeling, and high-resolution DGT and planar optode (PO) imag…

Exploring stress-tolerant plant growth-promoting rhizobacteria from groundnut rhizosphere soil in semi-arid regions of Ethiopia.

The potential of rhizobacteria with plant growth promoting (PGP) traits in alleviating abiotic stresses, especially drought, is significant. However, their exploitation in the semi-arid regions of Ethiopian soils remains largely unexplored. This research aimed to isolate and evaluate the PGP potential of bacterial isolates collected from groundnut cultivation areas in Ethiopia. Multiple traits were assessed, including phosphate solubilization, indole-3-acetic acid (IAA) production, ammonia production, salt and heavy metal tolerance, drought tolerance, enzyme activities, hydrogen cyanide produc

Effects of Lightning on Rhizosphere Soil Properties, Bacterial Communities, and Active Components of Camellia sinensis var. assamica.

Lightning rods have been developed to prevent damage caused by lightning to organisms. However, the biological effect of the current transmitted into the soil through lightning rods is unknown. In this study, we analyzed the effects of lightning on soil properties, the microbial community, and the active components of Pu-erh tea (Camellia sinensis var. assamica) near lightning rods. The results showed that the contents of organic matter and available potassium, copper, and calcium in rhizosphere soil near the lightning rod were significantly higher than those in control soil (P < 0.05), while …

Aluminium-phosphate interactions in the rhizosphere of two bean species: Phaseolus lunatus L. and Phaseolus vulgaris L.

BACKGROUND: Plants differ in their response to high aluminium (Al) concentrations, which typically cause toxicity in plants grown on acidic soils. The response depends on plant species and environmental conditions such as substrate and cultivation system. The present study aimed to assess Al-phosphate (P) dynamics in the rhizosphere of two bean species, Phaseolus vulgaris L. var. Red Kidney and Phaseolus lunatus L., in rhizobox experiments. RESULTS: Root activity of the bean species induced up to a sevenfold increase in exchangeable Al and up to a 30-fold decrease in extractable P. High solub…

Cultivable actinomycetes from rhizosphere of birch (Betula pendula) growing on a coal mine dump in Silets, Ukraine.

Five actinomycete strains were isolated from the rhizosphere of birch, one of a few native tree forms capable of thriving on the upper level of a coal mine dump near the village of Silets (Lvivska region, Ukraine). No such strains were isolated from surrounding gangue, or from nearby grass Calamagrostis epigeios. Using 16S rDNA sequencing and analysis of cell wall aminoacids, four of these strains were shown to belong to genus Streptomyces and one to be Amycolatopsis. The isolates were able to produce siderophores and antibacterial compounds. In comparison to the reference strain Streptomyces …

Pesticide tolerant and phosphorus solubilizing Pseudomonas sp. strain SGRAJ09 isolated from pesticides treated Achillea clavennae rhizosphere soil.

In this study, an attempt was made to identify an effective phosphate solubilizing bacteria from pesticide polluted field soil. Based on the formation of solubilization halo on Pikovskaya's agar, six isolates were selected and screened for pesticide tolerance and phosphate (P) solubilization ability through liquid assay. The results showed that only one strain (SGRAJ09) obtained from Achillea clavennae was found to tolerate maximum level of the pesticides tested and it was phylogenetically identified as Pseudomonas sp. It possessed a wide range of pesticide tolerance, ranging from 117 μg mL(-1

Genotypic and phenotypic diversity of PGPR fluorescent pseudomonads isolated from the rhizosphere of sugarcane (Saccharum officinarum L.).

The genetic diversity of plant growth-promoting rhizobacterial (PGPR) fluorescent pseudomonads associated with the sugarcane (Saccharum officinarum L.) rhizosphere was analyzed. Selected isolates were screened for plant growthpromoting properties including production of indole acetic acid, phosphate solubilization, denitrification ability, and production of antifungal metabolites. Furthermore, 16S rDNA sequence analysis was performed to identify and differentiate these isolates. Based on 16S rDNA sequence similarity, the isolates were designated as Pseudomonas plecoglossicida, P. fluorescens, …

Metagenomic Tools as Predictive Approaches to Decipher Soil and Rhizosphere Microbial Communities and Their Functions for Sustainable Agriculture.

The increasing demand for resilient and sustainable food production necessitates a comprehensive understanding of rhizosphere microbial communities and their functional roles in enhancing plant health, nutrient acquisition, stress resilience, and crop productivity, thereby supporting food security and sustainable agriculture. However, soil microbiomes are composed of complex and unculturable communities of beneficial microorganisms that drive critical ecosystem functions, which traditional culture methods cannot capture. This limits the understanding of their roles and impacts on plant health …

Microbial communities in the rhizosphere of three Mentha species: Links to soil properties and essential oil profiles.

Mentha species are widely cultivated aromatic plants valued for their essential oils and antimicrobial properties. However, despite their agricultural and pharmacological significance, limited information is available on how different Mentha species influence rhizosphere microbial communities and their relationships with soil physicochemical parameters and essential oil composition. In this study, we examined the rhizosphere microbiota of three closely related taxa - Mentha × villosa B10, M. spicata B17, and M. suaveolens J17 - cultivated under uniform field conditions. Rhizosphere and bulk so…

Environmental and agronomic drivers of bacterial and fungal alpha diversity in crop rhizosphere: a multifactorial field study.

Interactions with biotic and abiotic factors significantly impact soil microbial diversity, shaping it with varying intensities. This study investigated the effects of crop type (barley and maize), locality (Slovakia and the Czech Republic), growing year (2021-2023), seed treatment variant (control; seeds treated with fungicide; seeds coated with a superabsorbent polymer (SAP); and seeds treated with both fungicide and SAP), and repetition on microbial biomass and the alpha diversity of bacterial and fungal communities in the rhizosphere. Microbial community structure was assessed using automa…

Effects of biogas slurry-borne antibiotics and polypropylene microplastics on the rhizosphere microbiome and metabolome of Hybrid Pennisetum.

Antibiotic residues in biogas slurry and microplastic contamination are increasingly occurring in agricultural soils. However, their combined effects on rhizosphere ecological processes remain poorly understood. In this study, the individual and combined effects of polypropylene microplastics (PP-MPs, 1% w/w) and biogas slurry (BS, 0.5% w/w) on the rhizosphere soil of Hybrid Pennisetum were investigated by conducting an integrated analysis of 16S rRNA gene sequencing and untargeted metabolomics. The results revealed that PP-MPs alone significantly reduced soil bacterial α-diversity and inhibit…

Characterization of culturable endophytes and microbial communities in the rhizosphere and pitcher fluid of the carnivorous plant Nepenthes khasiana.

Endophytes colonize plant tissues through roots and shoots without causing harm and can move throughout the plant via its vascular system. H … ed endophytes. These findings suggest that endophytes in N. khasiana most likely originate from the rhizosphere, with possible migration into the pitcher fluid.

Влияние ПГПР на структуру микробиологической сообщества ризосферы и урожайность солончаковых зерновых культур.

Растворяющиеся в почве бактерии, способствующие росту растений (PGPR), могут защищать растения от почвенных заболеваний и абиотических стрессовых условий. Основная цель данного исследования заключалась в оценке влияния различных PGPR (TF1, TF2, TF3 и TF4) на микробную сообщество ризосферы зерна для корма в солончаково-щелочной поле с использованием высокопроизводительной технологии последовательного секвенирования Illumina MiSeq. Результаты показали, что различные PGPRs значительно увеличили плотность уборки (на 21,31–45,16%), высоту растения (на 9,12–19,98%), диаметр стебля (на 30,07–45,78%)

Совпадение в аннотации оригинала
Plant Growth Promoting Rhizobacteria, PGPR, can protect plants against soil-borne diseases and abiotic stress conditions. The primary objective of this study was to evaluate the effects of different PGPRs (TF1, TF2, TF3, and TF4) on the rhizosphere microbial community of silage maize in a saline-alkaline field via Illumina MiSeq high-throughput sequencing te…