Tag

Nitrogen Fixation

All articles tagged with #nitrogen fixation

science20 days ago•5 min saved

Revived 3-Billion-Year-Old Nitrogenase Still Fixes Nitrogen

Researchers rebuilt four ancient nitrogenase enzymes dating up to about 2.3 billion years ago and inserted them into Azotobacter vinelandii. All variants supported nitrogen fixation, though at slower rates than modern enzymes, and produced nitrogen-isotope fingerprints that match those seen in modern microbes and Archean rocks, implying an earlier origin for Mo-nitrogenase. The work offers new ways to study Earth's early biology and could inform future agricultural and exobiology research.

via Indian Defence Review|

#ancient-enzyme #isotopic-fractionation #nitrogen-fixation

science1 month ago•7 min saved

Ancient Enzyme Reborn: 3.2-Billion-Year Nitrogenase Sheds Light on Life's Origins

UW–Madison researchers resurrected a 3.2‑billion‑year‑old nitrogenase enzyme and tested it in modern microbes to study its function and isotope fingerprints, validating ancient biosignatures in rocks and advancing the search for life beyond Earth through NASA-backed astrobiology research.

via SciTechDaily|

#ancient-enzyme #isotopic-biosignatures #molecular-paleobiology

science5 months ago•3 min saved

Genetic Advances Could Reduce Fertilizer Dependence in Agriculture

Researchers have identified a genetic switch in plants that can be modified to enable crops like barley to fix nitrogen from the air through symbiosis with bacteria, potentially reducing the need for artificial fertilizers and making agriculture more sustainable.

via Phys.org|

#agriculture #genetics #nitrogen-fixation

science5 months ago•3 min saved

Scientists Discover Unusual Lifeform Beneath Arctic Ice

Scientists have discovered that nitrogen fixation occurs under Arctic sea ice, challenging previous assumptions that it was impossible in such inhospitable conditions. This process, vital for supporting marine food webs and potentially influencing the ocean's carbon budget, is now understood to be more widespread in the Arctic than previously thought, especially as sea ice retreats due to climate change. The findings suggest that Arctic ecosystems may be more resilient and productive than expected, but also highlight the need to include nitrogen fixation in future climate models.

via Yahoo|

#arctic-ice #climate-change #marine-ecosystem

science5 months ago•2 min saved

New Arctic Ecosystem Discovery Challenges Climate and Marine Life Assumptions

Scientists discovered nitrogen-fixing microbes beneath Arctic sea ice, challenging previous assumptions and suggesting that melting ice could increase microbial activity, potentially impacting global climate models by altering marine ecosystems and carbon absorption.

via ScienceAlert|

#arctic-ice #climate-change #marine-ecosystem

science7 months ago•2 min saved

Scientists' Unexpected Discovery Promises to Transform Farming

Researchers in Europe have discovered that zinc plays a crucial role in enhancing nitrogen fixation in legumes, which could lead to more sustainable farming practices by reducing reliance on chemical fertilizers, benefiting the environment and human health.

via The Cool Down|

#environment #farming #nitrogen-fixation

science10 months ago•4 min saved

Marine Snow Vital for Ocean's Survival

A new study reveals that marine snow, tiny drifting debris in the ocean, serves as a crucial habitat for bacteria that fix nitrogen, supporting ocean productivity and stability across various temperatures and oxygen levels, including in oxygen minimum zones, with implications for understanding climate change impacts on marine ecosystems.

via Earth.com|

#climate-change #marine-ecology #marine-snow

science2 years ago•6 min saved

"Breakthrough Discovery: Nitrogen-Fixing Organelle Emerges from Evolutionary Merger"

Scientists have discovered the first nitrogen-fixing organelle within a eukaryotic cell, challenging the belief that only bacteria can perform nitrogen fixation. Named a nitroplast, this organelle is the result of a rare process called primary endosymbiosis, where a prokaryotic cell is engulfed by a eukaryotic cell and evolves into an organelle. The discovery, involving decades of work and a bit of luck, sheds light on the evolution of organelles and has the potential to change perspectives on nitrogen fixation, agriculture, and ocean ecosystems. This research was funded by the Simons Foundation, National Institute of General Medical Sciences, and the Department of Energy (DOE) Office of Science Office of Biological and Environmental Research.

via Lawrence Berkeley National Laboratory (.gov)|

#eukaryotic-cell #lawrence-berkeley-national-laboratory #nitrogen-fixation

science2 years ago•2 min saved

"Discovery of Nitrogen-Fixing Organelles in Algae Shows Evolution in Action"

Researchers have discovered a potential new organelle, termed a nitroplast, which is evolving to fix nitrogen from the atmosphere. This process, known as endosymbiosis, is rare and has only been observed in a few cases, such as with mitochondria and chloroplasts. Nitrogen is essential for life, and the difficulty in obtaining it makes this discovery significant in understanding the evolution of complex cells and their specialized functions.

via Ars Technica|

#endosymbiosis #evolution #nitrogen-fixation

science2 years ago•3 min saved

"Volcanic Lightning: The Spark of Life on Earth"

Scientists have found geological evidence suggesting that volcanic lightning associated with explosive eruptions may have played a crucial role in fixing nitrogen, making it available for biological processes during Earth's early years. The discovery of significant amounts of nitrates in ancient volcanic deposits indicates that rampant volcanism may have been essential in supplying building blocks for life's emergence. This finding challenges previous assumptions about the origin of nitrate deposits and could have important implications for understanding the role of subaerial explosive eruptions in the emergence of life on Earth.

via ScienceAlert|

#earths-early-years #emergence-of-life #geological-evidence

science2 years ago•3 min saved

Surviving the Dinosaur Extinction: Plants' Nitrogen-Pulling Survival Strategy Revealed

A study has found that cycad plants, which survived the dinosaur extinction event, relied on symbiotic bacteria in their roots to obtain nitrogen from the atmosphere. These palm-like plants traded sugars with the bacteria in exchange for nitrogen, similar to modern legumes. By analyzing ancient plant fossils, researchers discovered that the surviving cycads were nitrogen-fixers, while the extinct lineages were not. This finding sheds light on the ecological changes that occurred in these plants over time and provides insights into Earth's climate history.

via Phys.org|

#cycads #fossil-record #nitrogen-fixation

science2 years ago•3 min saved

"Atlantic Seaweed Study Reveals Nitrogen Fixation Hotspots"

A long-term study conducted by researchers at the University of North Carolina at Chapel Hill has found significant nitrogen fixation hot spots in sargassum, a brown macroalgae in the seaweed family that floats on the surface of the open ocean. Nitrogen fixation, the process by which microorganisms convert nitrogen into a usable form for other plants and animals, was found to be significant in sargassum communities, potentially contributing to sargassum blooms and supporting marine productivity. The study highlights the importance of sargassum in the marine nitrogen cycle and suggests that previous studies may have underestimated nitrogen fixation in the Atlantic nitrogen budget.

via Phys.org|

#atlantic-seaweed #diazotrophs #marine-productivity