Navigation Links
New evidence for the oldest oxygen-breathing life on land
Date:10/19/2011

New University of Alberta research shows the first evidence that oxygen-breathing bacteria occupied and thrived on land 100 million years earlier than previously thought.

The researchers show the most primitive form of aerobic respiring life on land came into existence 2.48 billion years ago.

The research team, led by U of A geomicrobiologist Kurt Konhauser made their find by investigating a link between atmospheric oxygen levels and rising concentrations of chromium in the rock of ancient sea beds. The researchers suggest that the jump in chromium levels was triggered by the land-based oxidization of the mineral pyrite.

Pyrite oxidation is driven by bacteria and oxygen. Aerobic bacteria broke down the pyrite, which released acid at an unprecedented scale. The acid then dissolved rocks and soils into a cocktail of metals, including chromium, which was transferred to the ocean by the runoff of rain water.

Konhauser says the key to the process is oxygen in Earth's atmosphere that allowed bacterial oxidation of pyrite. The researchers dated the peak for chromium levels in marine sedimentary rock was reached 2.48 billion years ago.

"This gives us a new date for the Great Oxidation Event, the time when the atmosphere first had oxygen," said Konhauser. "The rising levels of atmospheric oxygen fostered the evolution of new bacteria species that survived by aerobic respiration on land.

"Our ancestors started off in an acid bath as oxygen-breathing bacteria."

The same bacterial life forms are alive and well today, living off pyrite and settling in the highly acidic waste waters of mining sites the world over.

The research by Konhauser and his team is published in the Oct.19 edition of the journal Nature.


'/>"/>

Contact: Brian Murphy
brian.murphy@ualberta.ca
780-492-6041
University of Alberta
Source:Eurekalert

Page: 1

Related biology news :

1. UMass researcher points to suppression of evidence on radiation effects by 1946 Nobel Laureate
2. Pitt team finds molecular evidence of brain changes in depressed females
3. More evidence that spicing up broccoli boosts its cancer-fighting power
4. Researchers discover oldest evidence of nails in modern primates
5. More evidence that caffeine lowers risk of skin cancer
6. Genetic evidence clears Ben Franklin
7. Evidence for food addiction in humans
8. New evidence of the benefits of home dialysis for kidney patients
9. Evidence of a natural origin for banned drug that plumps up livestock
10. Penn researchers show new evidence of genetic arms race against malaria
11. Silver cycle: New evidence for natural synthesis of silver nanoparticles
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/10/2014)...  Wake Forest Baptist Medical Center today announced plans for ... Medicine. Funding for this $50 million capital project is ... publicly launched next summer. The medical ... series R.J. Reynolds Tobacco Company complex, adjacent to 525@vine ... with plans to be ready to welcome medical students ...
(Date:12/10/2014)... SUNNYVALE, California , December 9, 2014 /PRNewswire/ ... Integrate with ITN,s BCARD Platform ... secure, cloud-based enterprise meeting scheduling solutions for business-to-business ... International, the world leader in mobile near-field communication ... solutions.      (Logo: http://photos.prnewswire.com/prnh/20140612/691055) , ...
(Date:12/4/2014)... Fla. , Dec. 3, 2014  Crossmatch™, ... today announced that its DigitalPersona ® Pro ... readers have been deployed throughout First Bank branch ... South Carolina and Virginia. First ... Southern Pines, North Carolina , ...
Breaking Biology News(10 mins):Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 2Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 3First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3
... that the dawn of agriculture may have come with ... some 11,400 years ago, roughly a thousand years before ... in the region. The discovery dates domesticated figs to ... making the fruit trees the oldest known domesticated crop. ...
... combining the four bacterial surface proteins that generate ... the University of Chicago have created a vaccine ... drug-resistant strains of Staphylococcus aureus, the most common ... source of community-associated illness. , The vaccine ...
... June 15th issue of G&D, Dr. Marie-Louise Hammarskjold (UVA) ... the Wilms' Tumor 1 tumor suppressor. The Wilms' Tumor ... pathological human development, with known roles in kidney and ... , Dr. Hammarskjold and colleagues reveal that WT1 works ...
Cached Biology News:Tamed 11,400 years ago, figs were likely first domesticated crop 2MRSA vaccine shows promise in mouse study 2MRSA vaccine shows promise in mouse study 3
(Date:12/17/2014)... 16, 2014 The Activated Carbon ... which is why IBISWorld updated its original industry research ... benefit from an intensified focus on environmental policy. Over ... emission standards for power plants and a range of ... IBISWorld Industry Analyst Sarah Kahn, “a range of downstream ...
(Date:12/17/2014)... Once more, EMAAR has selected ... waste water treatment plant to phase one of BayLaSun, ... Two years ago Bioshaft successfully supplied and operated a ... residential towers with an occupancy of 900 residences. ... gallons per day and was signed on September 16th, ...
(Date:12/17/2014)... 2014  Vermillion, Inc. (NASDAQ: VRML ), ... announced the next step in its expanded strategy to ... with the naming of current Chief Operating Officer, ... while current Chairman of the Board and CEO ... These changes are effective January 1, 2015. ...
(Date:12/15/2014)... METTLER TOLEDO is pleased to announce ... V19 with PVM technology , is now available. ... measurement tool continuously captures high-resolution images under a ... automatically prepares a report pairing the most relevant ... changes. This compelling blend of high resolution images ...
Breaking Biology Technology:Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 2Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 4New Real-Time In Situ Probe-Based Video Microscope from METTLER TOLEDO 2
... ... Calibration Free Supersaturation Assessment and Control for the Development and Optimization of Crystallization Processes, ... ATR-FTIR spectra for the production and control of qualitative supersaturation trajectories. , ... (PRWEB) October 9, 2009 -- ...
... PALO ALTO, Calif., Oct. 8 CardioDx, a cardiovascular ... G. Lange, M.D., Ph.D., as Chairman of the company,s ... first and only gene expression test to quantify the ... with stable chest pain. , "Dr. Lange brings ...
... WORTH, Texas, Oct. 8 Guacamole is a little ... and deli sections introduce Wholly "Pink" Guacamole. Nielsen-ranked, top-selling ... row, donating 15 percent of proceeds from October "PINK" ... pretty-in-pink box is a reminder of Texas-Based Wholly,s support ...
Cached Biology Technology:Calibration Free Supersaturation Assessment and Control for the Development and Optimization of Crystallization Processes 2CardioDx Announces Appointment of Dr. Louis G. Lange as Chairman of the Board of Directors 2CardioDx Announces Appointment of Dr. Louis G. Lange as Chairman of the Board of Directors 3Grocery Produce Fighting for a Cause - Wholly 'Pink' Guacamole 2
... as a wash buffer for Michels Transport Fluid ... for transportation of specimens (such as renal biopsies ... may remain in Transport Fluid for up to ... Fluid is not a fixative and is not ...
... sizes available for use with 96- or 384-well PCR ... for ease of location on 96-tube plates End ... skirt of the plate* Efficient sealing is achieved ... conjunction with screw or clip-down hot lid thermal cyclers ...
... provides complete components including positive and negative ... fragmentation in cultured cells and tissue sections. ... provides greater sensitivity than biotinylated or digoxigenylated ... cytometry. The kit works well with GFP ...
... Bionic Buffer is a unique ... and TAE (TRIS acetate-EDTA) electrophoresis buffers. ... runs, extremely rapid running times, and ... use in gel electrophoresis after dilution ...
Biology Products: