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:7/28/2014)... professor John Essigmann and colleagues from the University of Washington ... if they could induce the virus to mutate uncontrollably, they ... a strategy that our immune system uses against many viruses. ... HIV to mutate at an enhanced rate, as expected. But ... small clinical trial reported in 2011. In a new study, ...
(Date:7/28/2014)... of Solanum pennellii , a wild relative of ... group of researchers including the labs headed by Professors ... Department of Plant Biology. The new genome information may ... work, published July 27 in the journal Nature ... at Aachen University in Germany. The UC Davis labs ...
(Date:7/28/2014)... new study suggest two ways to effectively address the problem ... obese women, compared to women of a normal body mass ... say, but as the population has increased in weight, concern ... women. Studies have consistently found that obesity has a negative ... turn affect how well the pill prevents pregnancy. ...
Breaking Biology News(10 mins):Forced mutations doom HIV 2Forced mutations doom HIV 3Forced mutations doom HIV 4Strategies identified to improve oral contraceptive success with obese women 2
... synchrotron-based imaging techniques to identify previously unseen anatomy preserved in ... old lizard skin identified the presence of teeth (invisible to ... animal was more than just a skin moult. This was ... universe, x-rays generated by a synchrotron. Dr Phil ...
... , This press release is available in ... researcher at the Centre for Studies on Human Stress (CSHS) ... de Montral suggests that bullying by peers changes the structure ... vulnerable to mental health problems as they age. The ...
... As the federal government builds on its $1 billion investment ... research consortium has developed innovative new maps of both environmental ... remediation of the world,s largest fresh water resource. Writing ... the National Academy of Science ( PNAS ), a ...
Cached Biology News:Prehistoric ghosts revealing new details 2Bullying by childhood peers leaves a trace that can change the expression of a gene linked to mood 2Mapping effort charts restoration tack for Great Lakes 2Mapping effort charts restoration tack for Great Lakes 3
(Date:7/30/2014)... CA (PRWEB) July 30, 2014 Adding ... their weighing boat special – Buy 2 ... free. This promotion will benefit lab technicians looking for ... Weighing boats are ideal for multiple applications including weighing ... a variety of choices including diamond-shaped, hexagonal, square, aluminum ...
(Date:7/29/2014)... Boston, MA (PRWEB) July 30, 2014 ... communication (UC) and collaboration company, is proud to ... and account management positions in their Boston, Charleston ... in response to the increased demand for hosted ... enhance operational efficiency and reduce cost. , SoundConnect ...
(Date:7/29/2014)... The advanced optical methods and applications ... driving a revolution in the neurosciences were the inspiration ... by SPIE, the international society for optics and ... launch of the BRAIN Initiative in the United States, ... a vision for and provide examples of the impact ...
(Date:7/29/2014)... Quantum Cheshire Cat: Can a particle be separated from ... Nature Communications , published the results of the first ... field, conducted by Chapman University in Orange, CA, and ... seen a cat without a grin," thought Alice in ... most curious thing I ever saw in my life!" ...
Breaking Biology Technology:Weighing Boat Promotion Now Available at Pipette.com, Major Pipette Distributor 2SoundConnect Organization and Culture is Evolving 2SPIE Launches 'Neurophotonics' Journal with Special Section on BRAIN Initiative 2SPIE Launches 'Neurophotonics' Journal with Special Section on BRAIN Initiative 3SPIE Launches 'Neurophotonics' Journal with Special Section on BRAIN Initiative 4The quantum Cheshire cat: Scientists separate a particle from its properties 2The quantum Cheshire cat: Scientists separate a particle from its properties 3The quantum Cheshire cat: Scientists separate a particle from its properties 4
... Kingchem to Act as Agent to Find Partner ... for North American MarketsLAS VEGAS, April 3 ... Board: SNBP) ("Sinobiopharma") (the "Company") is pleased to ... export agreement with Kingchem, an international marketing organization ...
... ChromaDex Corporation, (OTC Bulletin Board: CDXC) a ... today announced financial results for the 2008 Fiscal ... with U.S. Generally Accepted Accounting Principles (U.S. GAAP), ... stockholders of $0.07 per share for the twelve ...
... April 3 Savient Pharmaceuticals, Inc. (Nasdaq: ... definitive agreements with select existing and new institutional investors ... share of its common stock, $0.01 par value per ... of its common stock in a registered direct offering ...
Cached Biology Technology:Sinobiopharma Signs Export Agreement With U.S. Pharmaceutical Supplier 2ChromaDex Announces 2008 Year End Financial Results 2ChromaDex Announces 2008 Year End Financial Results 3Savient Pharmaceuticals to Raise $31 Million Through Registered Direct Offering 2Savient Pharmaceuticals to Raise $31 Million Through Registered Direct Offering 3Savient Pharmaceuticals to Raise $31 Million Through Registered Direct Offering 4