Navigation Links
Organic solids in soil may speed up bacterial breathing
Date:5/23/2010

MADISON The "mineral-breathing" bacteria found in many oxygen-free environments may be "carbon-breathing" as well.

Oxygen-free, or anaerobic, environments contain microbes sometimes described as "mineral-breathing" because they use iron oxides and other minerals in the same way we use oxygen. According to a study published online May 23 in the journal Nature Geoscience, this bacterial respiration may be accelerated by solid organic compounds in the soil.

Led by University of Wisconsin-Madison geoscientist Eric Roden, the new work shows that iron oxide-breathing bacteria can do the same with insoluble organic substances, formed when plants and other organic materials biodegrade in soils and sediments. During respiration, the bacteria release electrons that interact with nearby substances, a process called reduction. Reduction of large organic molecules called humics and familiar to gardeners as part of planting soil represents a new pathway for electrical charges to move around in the environment, with implications for understanding soil chemistry and environmental contamination.

"The reason this is so important is that when the humic substances are reduced that is, when they go from having less electrons to having more electrons they are very reactive with other things, in particular iron oxides," says Roden, an expert on sediment geochemistry and microbiology.

Iron is both highly reactive and very abundant on Earth, making it a key element for understanding the chemistry, biology, and geology of natural environments.

"All kinds of things follow iron oxides organic contaminants, inorganic contaminants, energy flow, mineral transformations on Earth, speculation about possible iron-based microbial life on other worlds," Roden says. Insoluble organic compounds in the soil are a "player in that whole picture that no one had recognized before."

Similar reactions had previously been described with d
'/>"/>

Contact: Eric Roden
eroden@geology.wisc.edu
608-890-0724
University of Wisconsin-Madison
Source:Eurekalert

Page: 1 2

Related biology news :

1. Can organic labels backfire?
2. Cover crop mulches tested for no-till organic onions
3. Measuring the stability of organic waste
4. Ecology in organic ag: Combining farming, science
5. NPL supports growing organic electronics industry
6. Organic weed control for dandelions
7. Organic food not nutritionally better than conventionally-produced food
8. NTU professor discovers method to efficiently produce less toxic drugs using organic molecules
9. Can organic cropping systems be as profitable as conventional systems?
10. Can organic cropping systems be as profitable as conventional systems?
11. Engineers develop method to disperse chemically modified graphene in organic solvents
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... kidney injury related to the use of hydroxyethyl starch ... molecules, according to a report in Anesthesia & ... Society (IARS). , The "total mass of HES molecules" ... renal proximal tubule cells (PTCs), concludes the laboratory study ... Wrzburg, Austria. Other factorssuch as differences in the ...
(Date:7/11/2014)... exists that cannabinoid receptor type 1 can ... influx, and reduce neurotransmitter release. However, some ... can increase extracellular Ca2+ influx and increase ... team, Tongji Hospital Affiliated to Tongji Medical ... China used whole cell voltage-clamp and calcium ...
(Date:7/10/2014)... other major cities in New Mexico, nearly every public ... rather than precious potable water supplies. Across the U.S. ... golf courses receive treated effluent. Reusing the effluent increases ... courses and homeowners alike fertilize their lawns during the ... A New Mexico State University turfgrass expert has a ...
Breaking Biology News(10 mins):In lab studies, hydroxyethyl starch has direct harmful effects on kidney cells 2'Tailored' water -- the latest in lawn care 2
... the familiar semi-aquatic bugs gliding across the lake at the ... walk on water. This was not always the case. ... unique arrangement of the legs, with the mid-legs greatly elongated. ... Evolutionary Biology have discovered the gene behind this evolutionary change. ...
... human brain distinctly separates the handling of images of ... image type in a different area of the brain. ... visual information in this manner to optimize processing the ... people who have been blind since birth the brain ...
... Sandbar, dusky and tiger sharks are among dozens of ... East Coast. Little is known about many of the species, ... scientists and fishery resource managers to monitor shark populations and ... Northeast Fisheries Science Center (NEFSC) lab in Narragansett, R.I., recently ...
Cached Biology News:Brain innately separates living and non-living objects for processing 2Scientists conduct shark survey off US East Coast 2Scientists conduct shark survey off US East Coast 3
(Date:7/10/2014)... --  Ceres, Inc . (Nasdaq: CERE ), ... results for the three months ended May 31, 2014 ... Ceres reported that the company and its customers have ... in Brazil, which concluded in June, despite dry and ... for part of the growing season. Yields of several ...
(Date:7/10/2014)... fight against terrorism with the creation of a sensor ... use of light and special glass fibres. , Published ... , the researchers describe a novel optical fibre sensor ... 6.3 ppm (parts per million). It requires an analysis ... detection has involved looking for metals that encase them ...
(Date:7/10/2014)... A new study published today in the journal ... has found that time of day and sleep deprivation ... could be crucial when looking at the best time ... and heart disease, and for administering medicines effectively. , ... of Cancer Research, London, investigated the links between sleep ...
(Date:7/10/2014)... Hall effect in bilayer graphene and shown that this ... electric field. , The fractional quantum Hall effect, ... are exposed to large magnetic fields, is a striking ... behave as a single system. However, while the basic ... of this collective behavior remain not well understood, in ...
Breaking Biology Technology:Ceres Announces Fiscal Third Quarter 2014 Financial Results 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 3Ceres Announces Fiscal Third Quarter 2014 Financial Results 4Ceres Announces Fiscal Third Quarter 2014 Financial Results 5Ceres Announces Fiscal Third Quarter 2014 Financial Results 6Ceres Announces Fiscal Third Quarter 2014 Financial Results 7Ceres Announces Fiscal Third Quarter 2014 Financial Results 8Ceres Announces Fiscal Third Quarter 2014 Financial Results 9Detecting trace amounts of explosives with light 2Time of day crucial to accurately test for diseases, new research finds 2Columbia researchers observe tunable quantum behavior in bilayer graphene 2Columbia researchers observe tunable quantum behavior in bilayer graphene 3
... at the U.S. Department of Energy,s Savannah River National Laboratory ... nature can increase the usefulness of solar energy as a ... with Peng Jiang of the University of Florida, SRNL,s Dr. ... of this new approach for increasing the productivity of solar ...
... ... India , ... June 25, 2009 -- DuPont today announced it has made two cotton acquisitions ... business Pioneer Hi-Bred has purchased the cotton seed business of Nandi Seeds, based ...
... Resigning as CEO , , Board member Melinda Moree named ... for Global Health (BVGH) today announced that Christopher D. Earl, Ph.D., ... a member of the board since BVGH,s inception, will serve as ... , "I,ve been galvanized by my experience in global health and ...
Cached Biology Technology:SRNL to study applicability of solar cell coatings 2DuPont Adds Cotton to India Seed Product Lineup 2DuPont Adds Cotton to India Seed Product Lineup 3DuPont Adds Cotton to India Seed Product Lineup 4BIO Ventures for Global Health Announces Management Changes 2
... Recognizes VAMP-2 (Vesicle-Associated Membrane Protein ... does not share homology with ... It is expected that ... with human, Macaca multata and ...
... Vesicular Monoamine Transporter 2 (VMAT2). An antibody ... a major band at ~55 kDa in ... and not in wild type cells (2). ... molecular weight, were also detected and remain ...
Immunogen for A300-655A was a phosphorylated synthetic peptide, which represented a portion of human RNA Polymerase II (GeneID 5430) around serine 5 of the C-terminal repeat YSPTSPS....
... CLS number is a new ... match Cornings product number. If ... order under the old Sigma-Aldrich ... service for assistance. Mfr ...
Biology Products: