Navigation Links
LSU professor looks for life in and under antarctic ice
Date:8/31/2007

BATON ROUGE Antarctica is home to the largest body of ice on Earth. Prior to approximately 10 years ago, no one thought that life could exist beneath the Antarctic ice sheets, which can be more than two miles thick in places, because conditions were believed to be too extreme. However, Brent Christner, assistant professor of biological sciences at LSU, has spent a great deal of time in one of the worlds most hostile environments conducting research that proves otherwise.

Christners discoveries of viable microbes in ancient ice cores and subglacial environments coupled with the realization that large quantities of liquid water exist beneath the Antarctic ice sheet have changed the way biologists view life in Antarctica.

More than 150 lakes have been discovered underneath nearly two-and-a-half miles of ice in Antactica, said Christner, and most of these bodies of water have likely been covered by ice for at least 15 million years. The environmental conditions in the deep cold biosphere are unlike anything on the Earths surface and this represents one of the most extreme habitats for life on the planet.

A timeframe of up to one million years is required for microbes in the atmosphere to be transported through the ice sheet and enter an Antarctic subglacial lake. Even though cells are preserved in the ice, the question of how the DNA of these organisms remains unscathed over such long periods of apparent metabolic inactivity still remains.

According to Christner, there are two possible explanations of how these microbes could survive frozen for millenia. Firstly, the microbes may be dormant in the ice and possess very effective repair mechanisms that are initiated when the cells are introduced to a growth situation, he said. Given enough time, dormant cells without active DNA repair mechanisms would eventually incur a lethal level of radiation-induced damage from natural background sources in the ice.

Alternatively, Christner s
'/>"/>
Contact: Brent Christner
xner@lsu.edu
225-578-1734
Louisiana State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Great White shark evolution debate involves WSU Lake Campus geology professor
2. K-State professors discover enzyme responsible for creation of a beetles hard shell
3. Pitt professors theory of evolution gets boost from cell research
4. DNA conclusive yet still controversial, Carnegie Mellon professor says
5. Professors to develop hand-held pathogen testing device
6. LSU professor discovers new species
7. Looks matter to female barn swallows
8. Worlds pledge to halve hunger by 2015 looks like empty promise
9. Bioartificial kidney under study at MCG
10. UCSB scientists probe sea floor venting to gain understanding of early life on Earth
11. Zebrafish may hold key to understanding human nerve cell development
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/9/2014)... increase the survival rate of naturally aged animals? ... Pharmaceutical Sciences, Southwest University, China performed an animal ... low dose of levothyroxine for 3 consecutive months. ... obvious improvement in cognitive and an increased rat ... mechanism was demonstrated that levothyroxine treatment can increase ...
(Date:7/9/2014)... in their blood are more likely to survive the disease, ... of vitamin D have half the risk of dying compared ... The study is the first to correlate total blood levels ... which includes that produced after exposure to sunlight and ... survival prospects. , The University of Edinburgh team tested ...
(Date:7/9/2014)... they are used in the right ways. ... Hospital and coauthors analyzed six use cases with ... decompensation (when a patient,s condition worsens); adverse events; ... organ systems. They suspect that cost-savings benefits will ... all six scenarios will be significant. The authors ...
Breaking Biology News(10 mins):The impact of big data on health care: Health Affairs' July issue 2
... of great whales ever recorded? To answer that ... the Wildlife Conservation Society have joined experts from other ... Commission on the Patagonian coast of Argentina to try ... issue is the long-term conservation of the southern right ...
... "Four and 20 black birds baked in a pie" but ... analysis, means scientists now know there is one more species of ... thought. And if Dr. Gary Voelker has his way, he,ll soon ... deforestation now occurring across its native habitat. The bird ...
... resistance to sea lice treatments such as the pyrethroids ... Pyrethroid use still increased from 2008 to 2009, although ... are being used again due to resistance problems, e.g. ... been used since 1997, was also used again in ...
Cached Biology News:Experts gather to solve mystery of largest recorded die-off of great whales 2Experts gather to solve mystery of largest recorded die-off of great whales 3African bird discovery proves there is something new under the sun 2
(Date:1/15/2014)... The Pittcon Organizing Committee is pleased to announce ... , an e-Journal and producer of Food Labs ... year for the co-location of Food Labs Conference to be ... the registration fee to attend the two-day Food Lab Conference, ...
(Date:1/15/2014)... 15, 2014 ­ RedBrick Health , a fast-growing ... today announces that EmblemHealth , the ... is now providing the RedBrick Compass health assessment, combined ... all of its members. EmblemHealth is among the first ...
(Date:1/15/2014)... 2014 The Microcompetition with Foreign DNA theory ... of these latent viruses is the Epstein Barr Virus (EBV), ... arthritis (RA) is a chronic inflammatory disease that destroys the ... that RA patients have high concentrations of EBV DNA in ...
(Date:1/15/2014)... , Jan. 15, 2014 TaiGen Biotechnology Company, ... exclusive agreement with R-Pharm, a leading Russian pharmaceutical company, ... the Russian Federation , ... Independent States (CIS). Nemonoxacin is a novel antibiotic for the ...
Breaking Biology Technology:Pittcon Announces Second Year Partnership With Food Safety Tech 2Pittcon Announces Second Year Partnership With Food Safety Tech 3EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 3Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4
... WALTHAM, Mass., Nov. 2, 2010 Repligen Corporation (Nasdaq: ... second quarter of fiscal year 2011, ended September 30, ... compared to total revenue of $5,421,000 for the second ... or 35%.  Bioprocessing product revenue for the second quarter ...
... Inc. (OTC Bulletin Board: WDST ), a ... therapies to restore the health of damaged tissues and ... newest advancements in regenerative medicine on November 9th, 2010 ... role in the commercialization of the therapeutic candidate, PermaDerm™, ...
... of a Nobel prize this year but research led ... Warwick has found molecular hooks on the surface of ... provide massive benefits to researchers using transmission electron microscopes. ... mechanisms. The research team, which includes Drs. Jeremy Sloan, ...
Cached Biology Technology:Repligen Reports Second Quarter Fiscal Year 2011 Financial Results 2Repligen Reports Second Quarter Fiscal Year 2011 Financial Results 3Repligen Reports Second Quarter Fiscal Year 2011 Financial Results 4Repligen Reports Second Quarter Fiscal Year 2011 Financial Results 5Repligen Reports Second Quarter Fiscal Year 2011 Financial Results 6Repligen Reports Second Quarter Fiscal Year 2011 Financial Results 7Regenicin to Present at Event Celebrating Advancements in Regenerative Medicine 2Pivoting hooks of graphene's chemical cousin could revolutionize work of electron microscopes 2
Request Info...
... from E. coli is a ... also contains both 5'--3'and 3'--5' ... activity enables the enzyme to ... the DNA as starting points ...
Request Info...
... E. coli containing a clone of the human ... Topoisomerase II alters the topological state of nucleic ... a transient break which generates a separate DNA ... double-stranded DNA passage mechanism, the enzyme can relax ...
Biology Products: