AI Article Synopsis
- Redox cycling of iron is crucial for nutrient acquisition by organisms and the geochemical cycling of elements in aquatic environments, involving both microbial activity and abiotic processes.
- A study reveals that a specific phototrophic species, SW2, can reduce Fe(III) during bacterial growth and is connected to an electron transport system through a -type cytochrome.
- The findings suggest that iron redox transformation by anoxygenic photoferrotrophs occurs globally in both modern and ancient environments, thus highlighting their significant role in iron cycling.
Article Abstract
Redox cycling of iron plays a pivotal role in both nutrient acquisition by living organisms and the geochemical cycling of elements in aquatic environments. In nature, iron cycling is mediated by microbial Fe(II)-oxidizers and Fe(III)-reducers or through the interplay of biotic and abiotic iron transformation processes. Here, we unveil a specific iron cycling process driven by one single phototrophic species, SW2. It exhibits the capability to reduce Fe(III) during bacterial cultivation. A -type cytochrome is identified with Fe(III)-reducing activity, implying the linkage of Fe(III) reduction with the electron transport system. SW2 can mediate iron redox transformation, depending on the availability of light and/or organic substrates. Iron cycling driven by anoxygenic photoferrotrophs is proposed to exist worldwide in modern and ancient environments. Our work not only enriches the theoretical basis of iron cycling in nature but also implies multiple roles of anoxygenic photoferrotrophs in iron transformation processes.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11570789 | PMC |
| http://dx.doi.org/10.34133/research.0528 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
In Situ Balanced Synthesis of High-Activity Low-Spin Iron Cathode Prussian Blue for Enhanced Sodium-Ion Storage.
Nano Lett
January 2025
Key Laboratory of Advanced Structural Materials, Ministry of Education, and School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China.
The growing market for sodium-ion batteries has stimulated interest in research on Prussian blue-type cathode materials. Iron hexacyanoferrate (FeHCF) is considered a desirable Prussian blue-type cathode, but the incomplete electrochemical property of its low-spin iron sites hinders its further practical application. In this paper, carboxymethyl cellulose is demonstrated to have an appropriate binding energy through DFT calculations, synthesize Prussian blue in situ, balance Fe and water in FeHCF, and introduce Fe vacancies to activate low-spin Fe sites.
View Article and Find Full Text PDFThe morphology and structure of zero-valent iron nanosheets promote the activation of persulfate for degradation of ciprofloxacin.
Environ Res
January 2025
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, P.R. China.
Herein, a biochar-supported zero-valent iron (ZVI) nanosheet catalyst (Fe@BC) for the activation of persulfate to degrade ciprofloxacin (CIP) was prepared using industrial kraft lignin and Fenton sludge as carbon and iron sources, respectively. Fe@BC showed considerably better CIP degradation efficiency (96.9% at 20 mg·L) than traditional catalysts.
View Article and Find Full Text PDFAtomically dispersed rare earth dysprosium-nitrogen-carbon for boosting oxygen reduction reaction.
J Colloid Interface Sci
January 2025
Collaborative Innovation Center of Sustainable Energy Materials, School of Physical Science and Technology, Guangxi University, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Nanning 530004, China. Electronic address:
Transition metal-nitrogen-carbon (MNC) based on 3d metal atoms as promising non-precious metal catalysts have been extensively exploited for oxygen reduction reaction (ORR), but MNC with 4f rare earth metals have been largely ignored, most likely due to their large atomic radii that are difficult to coordinate with N dopants using conventional precursors. Herein, atomically dispersed dysprosium-nitrogen-carbon (DyNC) nanosheets were developed via the pyrolysis of anitrogen-containing chelate compound of 2, 4, 6-Tri (2-pyridyl) 1, 3, 5-triazine (TPTZ) ligand with Dy under the assistance of molten NaCl. The as-synthesized DyNC features specific moieties of single Dy atom coordinated by N and O as active sites for ORR, displaying excellent performance.
View Article and Find Full Text PDFPhotoheterotrophic extracellular reduction of ferrihydrite activates diverse intracellular metabolic pathways in Rhodopseudomonas palustris for enhanced antibiotic degradation.
Water Res
January 2025
Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China. Electronic address:
Anoxygenic photosynthetic bacteria (APB) have been frequently detected as a photoautotrophic Fe-carbon cycling drivers in photic and anoxic environment. However, the potential capacity of these bacteria for photoheterotrophic extracellular reduction of iron-containing minerals and their impact on the transformation of organic pollutants remain currently unknown. This study investigated the capacity of R.
View Article and Find Full Text PDFDo you have enough space? Habitat selection of insectivorous cave-dwelling bats in fragmented landscapes of Eastern Amazon.
PLoS One
January 2025
Instituto Tecnológico Vale (ITV), Belém, Pará, Brazil.
Individual movements of bats are triggered by their life requirements, limited by their recognition of the environment and risks of moving, and mediated by habitat selection. Mining adds fragmentation and heterogeneity to landscapes, with poorly understood consequences to the life activities of the bats. Cave dwelling bats spend most of their life cycles within caves, and as they constantly forage in external landscapes, their contribution in the input of organic matter to the caves is of paramount importance to the subterranean biodiversity.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!