Article
Microbiology
Sharon L. Grim, Alexander A. Voorhies, Bopaiah A. Biddanda, Sunit Jain, Stephen C. Nold, Russ Green, Gregory J. Dick
Summary: The research reveals the presence of cyanobacteria and various Proteobacteria in cyanobacterial mats, involved in metabolic activities such as sulfur cycling, demonstrating the interconnected cycling of oxygen and sulfur compounds.
Article
Environmental Sciences
D. Konig, T. M. Conway, M. J. Ellwood, W. B. Homoky, A. Tagliabue
Summary: Iron isotopes in the ocean are crucial in studying the iron cycle, but the complexity of various external sources and fractionation processes can complicate the interpretation of observations. By incorporating iron isotopes into a global ocean biogeochemical model, research finds that distinct external source endmembers and isotopic fractionation are essential for explaining the distribution of dissolved iron isotopes, with the water column's δFe-56(diss) distribution influenced by regional imbalance of remineralization and abiotic removal processes.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Geosciences, Multidisciplinary
D. Konig, T. M. Conway, D. S. Hamilton, A. Tagliabue
Summary: This study uses a global ocean biogeochemical model with active Fe isotope cycling to investigate the impact of anthropogenic Fe sources on surface ocean dFe and δFe-56(diss). The results show that the response of dFe, δFe-56(diss), and primary productivity is variable and regulated by the biogeochemical regime, rather than following the footprint of atmospheric deposition. The study also finds that while δFe-56(diss) can trace anthropogenic input, its response is attenuated by fractionation during phytoplankton uptake, but amplified by other isotopically-light Fe sources.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Engineering, Environmental
Kai Liu, Sherry L. Schiff, Lingling Wu, Lewis A. Molot, Jason J. Venkiteswaran, Michael J. Paterson, Richard J. Elgood, Jackson M. Tsuji, Josh D. Neufeld
Summary: Stable Fe isotopes in freshwater systems, especially in meromictic lakes, have recently been measured. This study focuses on two small dimictic boreal shield headwater lakes and reveals the large fractionations of 556Fe in dissolved, particulate, and sediment Fe, which have implications for biogeochemical cycling and acquisition of Fe by cyanobacteria in Earth's early ferruginous oceans.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Darci A. Swenson Perger, Ian P. Dwyer, Robert C. Aller, Nils Volkenborn, Christina Heilbrun, Laura M. Wehrmann
Summary: This study found high benthic dissolved iron (Fed) fluxes from sandy sediments, especially when bioirrigation was simulated. Despite low concentrations of labile organic matter and porewater Fed, large fluxes were sustained due to upward advective transport of dissolved porewater constituents. This highlights the importance of permeable sediments in global estimates of benthic Fed fluxes.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Microbiology
Nicholas Lambrecht, Zackry Stevenson, Cody S. Sheik, Matthew A. Pronschinske, Hui Tong, Elizabeth D. Swanner
Summary: Anoxygenic phototrophic bacteria, such as green sulfur bacteria (GSB), can be important primary producers in some meromictic lakes. Some GSB have been detected in ferruginous lakes, utilizing Fe(II) for photosynthesis. An enrichment from a meromictic ferruginous lake in Minnesota contains an Fe(II)-oxidizing GSB and a putative Fe(III)-reducing anaerobe, indicating their potential role in Fe(II) oxidation and carbon cycling in such lakes.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Multidisciplinary Sciences
A. J. Herrmann, J. Sorwat, J. M. Byrne, N. Frankenberg-Dinkel, M. M. Gehringer
Summary: The study explores the toxic effects of Fe(II) on Cyanobacteria growth in a simulated ancient marine environment, and finds that gas exchange and rust formation can alleviate iron toxicity, promoting Cyanobacterial photosynthesis.
NATURE COMMUNICATIONS
(2021)
Article
Geosciences, Multidisciplinary
R. K. Braghiere, J. B. Fisher, R. A. Fisher, M. Shi, B. S. Steidinger, B. N. Sulman, N. A. Soudzilovskaia, X. Yang, J. Liang, K. G. Peay, T. W. Crowther, R. P. Phillips
Summary: The study found that the distribution of mycorrhizal fungi has a significant impact on global carbon and nutrient cycling. As soil nitrogen becomes more limited, the costs for plants to acquire nitrogen through mycorrhizae have increased at a faster rate, suggesting that nutrient acquisition will increasingly rely on a higher portion of assimilated carbon to support productivity.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Soil Science
Laurel K. ThomasArrigo, Ruben Kretzschmar
Summary: Soils in Iceland have abundant SRO iron minerals and aluminosilicates. Microbial reduction of iron and increased soil solution pH occur under anoxic conditions. Soils with SRO iron minerals undergo more extensive iron reduction. Colloids persist during re-oxidation and new iron mineral phases are formed.
Article
Mineralogy
Maria Angelica D. Rea, Joel Brugger, Barbara Etschmann, Victor Okrugin, Jeremiah Shuster
Summary: This study analyzed the surface textures and morphologies of gold particles in Kamchatka, Russia, and found remarkably variable surface textures with clay-filled concavities. The majority of detected bacteria on the particles were Proteobacteria, with Gammaproteobacteria being the most dominant class. This research contributes to the understanding of gold biogeochemical cycling in a unique bioclimatic environment.
MINERALOGICAL MAGAZINE
(2021)
Article
Engineering, Environmental
Yizhou He, Yang Yang, Wenting Chi, Shiwen Hu, Guojun Chen, Qi Wang, Kuan Cheng, Chao Guo, Tongxu Liu, Bingqing Xia
Summary: This study investigates the transformation of antimony (Sb) in paddy fields and identifies the key processes involved. The results show that under anaerobic conditions, the release of Sb is facilitated by the reductive dissolution of iron, the release of soil colloids, and dissolved organic carbon. In the subsequent aerobic phase, the oxidation of Sb(III) by reactive oxygen species leads to increased levels of dissolved Sb(V). These findings contribute to a better understanding of the biogeochemical cycling of Sb in paddy systems.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Agronomy
Isaac Ahanamungu Makelele, Marijn Bauters, Kris Verheyen, Matti Barthel, Johan Six, Tobias Rutting, Samuel Bode, Landry Cizungu Ntaboba, Basile Mujinya Bazirake, Faustin Boyemba Bosela, Fabrice Kimbesa, Corneille Ewango, Pascal Boeckx
Summary: Secondary forests in the Congo basin receive high amounts of atmospheric nitrogen deposition but still exhibit nitrogen limitation in early succession, which gradually becomes more open as succession advances.
Article
Geosciences, Multidisciplinary
Lisa C. Herbert, Alexander B. Michaud, Katja Laufer-Meiser, Clara J. M. Hoppe, Qingzhi Zhu, Robert C. Aller, Bo Barker Jorgensen, Laura M. Wehrmann
Summary: Glaciated fjords are dynamic systems influenced by seasonal changes and spatial gradients, impacting organic carbon mineralization and nutrient fluxes. Seasonal variations and increased benthic nutrient sources may lead to changes in iron and sulfur cycling.
JOURNAL OF MARINE SYSTEMS
(2022)
Article
Geology
Fumito Shiraishi, Yusaku Hanzawa, Jiro Asada, Leonardo Fadel Cury, Anelize Manuela Bahniuk
Summary: This study investigates tufa deposits formed in a tropical climate in Brazil and applies geomicrobiological techniques to clarify their depositional processes. The study reveals the significant contribution of cyanobacterial photosynthesis and the influence of extracellular polymeric substances on the depositional fabrics in tufas formed in a tropical climate.
SEDIMENTARY GEOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Jianrong Huang, Adrian Mellage, Julian Pavon Garcia, David Gloeckler, Susanne Mahler, Martin Elsner, Natalia Jakus, Muammar Mansor, Hongchen Jiang, Andreas Kappler
Summary: Autotrophic nitrate-reducing Fe(II)-oxidizing microorganisms play a crucial role in carbon, iron, and nitrogen cycles. The study showed that the distribution of electrons from Fe(II) oxidation to either CO2 fixation or nitrate reduction deviated from the theoretical value. N2O was the main denitrification product. Furthermore, the Fe/N ratios influenced the distribution of electrons and the degree of cell-mineral interactions.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Chao Peng, Casey Bryce, Anneli Sundman, Andreas Kappler
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2019)
Review
Plant Sciences
Patricia Sanchez-Baracaldo, Tanai Cardona
Article
Microbiology
Catalina Urrejola, Peter von Dassow, Ger van den Engh, Loreto Salas, Conrad W. Mullineaux, Rafael Vicuna, Patricia Sanchez-Baracaldo
JOURNAL OF BACTERIOLOGY
(2020)
Article
Biotechnology & Applied Microbiology
Nia Blackwell, Casey Bryce, Daniel Straub, Andreas Kappler, Sara Kleindienst
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2020)
Article
Multidisciplinary Sciences
Monique S. Patzner, Carsten W. Mueller, Miroslava Malusova, Moritz Baur, Verena Nikeleit, Thomas Scholten, Carmen Hoeschen, James M. Byrne, Thomas Borch, Andreas Kappler, Casey Bryce
NATURE COMMUNICATIONS
(2020)
Article
Ecology
Giorgio Bianchini, Patricia Sanchez-Baracaldo
Summary: Trait evolution analyses allow comparison of characters across different species, useful for inferring ancestral phenotypes. sMap, a new program for stochastic mapping analyses, offers a wide variety of models and prior distributions, ability to use posterior distribution of trees for model selection, and implementation of three types of characters. sMap enables accurate analyses of discrete character evolution, including conditioned characters to study interaction of traits and can be used in various systems for academic research and teaching.
METHODS IN ECOLOGY AND EVOLUTION
(2021)
Article
Plant Sciences
John A. Raven, Patricia Sanchez-Baracaldo
Summary: The earliest branching cyanobacterium, Gloeobacter, lacks thylakoids and exhibits ancestral traits. It grows epilithically in microbial mats in low-salinity environments. The absence of thylakoids may limit photosynthetic processes in the plasma membrane, impacting productivity in nature.
Article
Biochemistry & Molecular Biology
Thomas Oliver, Patricia Sanchez-Baracaldo, Anthony W. Larkum, A. William Rutherford, Tanai Cardona
Summary: This study compares the core antenna subunit duplication in photosystem II with early events in the history of life, providing additional evidence supporting the premise that water oxidation originated closer to the origin of life and bioenergetics than previously thought.
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2021)
Article
Biology
B. D. A. Naafs, G. Bianchini, F. M. Monteiro, P. Sanchez-Baracaldo
Summary: The 2-methylhopanes are molecular fossils of 2-methylbacteriohopanepolyols and are among the oldest biomarkers on Earth. Studies show that the gene responsible for their synthesis is widespread in cyanobacteria and proteobacteria, suggesting their dominant presence in these bacterial cultures. Geological records indicate the occurrence of 2-methylhopanes from the Paleoproterozoic onwards, with high abundances associated with climatic and biogeochemical perturbations during the Phanerozoic.
Review
Biochemistry & Molecular Biology
Patricia Sanchez-Baracaldo, Giorgio Bianchini, Jamie D. Wilson, Andrew H. Knoll
Summary: Cyanobacteria, as the only prokaryotes with oxygenic photosynthesis, have had a significant impact on the biology and chemistry of our planet. Genomic and evolutionary studies have enriched our understanding of early phototrophs and their role in the global carbon cycle. Cyanobacteria diversified after the Great Oxidation Event and played a crucial role in shaping the Earth's environment.
TRENDS IN MICROBIOLOGY
(2022)
Article
Multidisciplinary Sciences
Joanne S. Boden, Kurt O. Konhauser, Leslie J. Robbins, Patricia Sanchez-Baracaldo
Summary: Research shows that ancestral cyanobacteria had the ability to deal with oxidative stress as early as the Archaean, gradually evolving more cofactors. The evolutionary history of metalloenzymes reveals how early cyanobacteria managed reactive oxygen species.
NATURE COMMUNICATIONS
(2021)
Article
Microbiology
Mirjam Perner, Klaus Wallmann, Nicole Adam-Beyer, Helmke Hepach, Katja Laufer-Meiser, Stefanie Boehnke, Isabel Diercks, Hermann W. Bange, Daniela Indenbirken, Verena Nikeleit, Casey Bryce, Andreas Kappler, Anja Engel, Florian Scholz
Summary: Anthropogenic activities are causing ocean warming and deoxygenation, which in turn affect biodiversity, productivity, and biogeochemical cycling. This study investigates the microbial community and its activity at the Boknis Eck study site to understand how rising temperatures and deoxygenation impact the ecosystem.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Timm Bayer, Elizabeth J. Tomaszewski, Casey Bryce, Andreas Kappler, James M. Byrne
Summary: In this study, a chemostat was used to investigate the autotrophic nitrate-reducing Fe(II)-oxidizing culture KS over 24 days. The results showed that the Fe(II) oxidation rate was highest in the chemostat, but the extent of oxidation was similar to the other experimental setups. Short-range ordered Fe(III) phases and goethite were detected in the chemostat. The study revealed the importance of reactive nitrogen intermediates on Fe(II) oxidation, mineral formation, and cell-mineral interactions under continuous conditions.
ENVIRONMENTAL MICROBIOLOGY REPORTS
(2023)
Article
Geography, Physical
Ferdinand J. Hampl, Ferry Schiperski, Christopher Schwerdhelm, Nicole Stroncik, Casey Bryce, Friedhelm von Blanckenburg, Thomas Neumann
Summary: Subsurface fluid pathways and climate-dependent infiltration of fluids control the intensity and depth of mineral weathering reactions. Secondary minerals formed during weathering reactions exert control on subsurface fluid flow and weathering profile development. The depth and intensity of weathering are influenced by weathering-induced fracturing, precipitation of secondary minerals, and the swelling of clay minerals. The Mediterranean climate zone experiences low weathering intensity and limited water supply, while the humid climate zone has high weathering intensity due to intense formation of secondary minerals and high water infiltration. The depth and intensity of weathering processes are controlled by positive and negative feedbacks between secondary mineral formation and fluid infiltration.
EARTH SURFACE DYNAMICS
(2023)
Article
Microbiology
Casey Bryce, Nia Blackwell, Daniel Straub, Sara Kleindienst, Andreas Kappler
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2019)
Correction
Biochemistry & Molecular Biology
Siew Chin Chan, Chih-Wei Tung, Chia-Wei Lin, Yun-Shiuan Tung, Po-Min Wu, Pei-Hsun Cheng, Chuan-Mu Chen, Shang-Hsun Yang
FREE RADICAL BIOLOGY AND MEDICINE
(2024)
Article
Biochemistry & Molecular Biology
Suyuan Liu, Meiling Tan, Jiangxue Cai, Chenxuan Li, Miaoxin Yang, Xiaoxiao Sun, Bin He
Summary: This study reveals that the antibiotic doxycycline effectively inhibits NLRP3 inflammasome activation by targeting mitochondrial translation and mtDNA synthesis, offering potential for the treatment of NLRP3-related diseases.
FREE RADICAL BIOLOGY AND MEDICINE
(2024)
Article
Biochemistry & Molecular Biology
Hao Liu, Nana Li, Ge Kuang, Xia Gong, Ting Wang, Jun Hu, Hui Du, Minxuan Zhong, Jiashi Guo, Yao Xie, Yang Xiang, Shengwang Wu, Yiling Yuan, Xinru Yin, Jingyuan Wan, Ke Li
Summary: Protectin D1 (PTD1) improves hepatic steatosis, inflammation and fibrosis in a NASH mouse model by inhibiting the activation of TLR4 downstream signaling pathway, possibly through upregulation of IRAK-M expression, suggesting a potential new treatment for NASH.
FREE RADICAL BIOLOGY AND MEDICINE
(2024)
