Navigation Links
Montana State team overcomes challenges, proves that microbes swim to hydrogen gas
Date:11/8/2013

BOZEMAN, Mont. Scientists have long believed that microorganisms that produce methane swim toward the hydrogen gas they need to stay alive, but it has been too hard to prove in the lab.

Montana State University researchers have now overcome those challenges, allowing them to verify it for the first time, said Matthew Fields, an associate professor in MSU's Department of Microbiology and co-author of a new paper describing the find.

In the process, the researchers discovered hydrogenotaxis, the movement of a biological cell toward hydrogen gas, and noticed that the cells were especially speedy when starving. They also made a video of the microorganism rushing toward its next meal. The methane-producing organism lives without oxygen, and it's classified as Archaea, one of the three domains of life.

An article explaining MSU's find is published in the Nov. 5 issue of Scientific Reports, an online journal affiliated with the international journal Nature.

The MSU breakthrough helps fill in gaps of knowledge about microorganisms that are crucial to Earth's carbon cycle, early Earth processes and climate change, Fields said. It will also have implications across a wide range of disciplines since methanogenic Archaea live in anaerobic environments, ranging from salt marshes to wastewater treatment to the human microbiota. Whenever organic matter is being degraded, these microorganisms are typically present.

"They are the bottom of the food chain," Fields said.

MSU microbiologist Gill Geesey, who encouraged the team to pursue the project, added that the scientists demonstrated hydrogenotaxis for the first time in any domain of life. He added that the movement likely gives microorganisms a competitive advantage for accessing hydrogen in the environment.

"Hydrogenotaxis may also promote the establishment and maintenance of microbial interactions at the population- and community-level, which has been a focus of research at the Center for Biofilm Engineering at Montana State University since its establishment in 1990," Geesey said. "The observed hydrogenotaxis could represent an important strategy used by methanogens and other hydrogen-utilizing microbes for cycling of elements in natural and engineered processes. "

Fields and four collaborators conducted their research in the Center for Biofilm Engineering (CBE), using a common microorganism that converts hydrogen gas into methane. Methanococcus maripaludis is approximately one micron in diameter -- one millionth of a meter -- and can only be seen under the microscope. It is difficult to grow in a lab, one reason that researchers have been unable to verify earlier that Archaea organisms swim toward hydrogen gas, Fields said.

To conduct their research, the scientists created an oxygen-free environment in a fragile tube. Creating that environment was challenging, another reason that their discovery didn't occur earlier, Fields said.

After varying lengths of time, they released the cells into a solution to encounter hydrogen gas from the opposite end of the tube. That's where they proved what everyone had suspected that Archaea swim through liquid toward hydrogen gas.

Every step in their experiments had to be done without breaking the tube or introducing oxygen, Fields said. It also had to be done inside an incubator with microscopes and computers. Computer software tracked the cells, proved they responded to hydrogen gas, and determined their speed.

Considering that speed relates to body length, Fields said the microbes moved faster than cheetahs, the fastest land animal on Earth.


'/>"/>

Contact: Evelyn Boswell
evelynb@montana.edu
406-994-5135
Montana State University
Source:Eurekalert

Related biology news :

1. Montana State University researchers highlight bears use of Banff highway crossings
2. New research shows tea may help promote weight loss, improve heart health and slow progression of prostate cancer
3. Elseviers Maturitas publishes position statement on fertility preservation
4. Patient in vegetative state not just aware, but paying attention
5. Veterinary scientists track the origin of a deadly emerging pig virus in the United States
6. Prostate Cancer Foundation announces new urine test for prostate cancer available
7. Georgia State researcher gets $499,209 NSF grant to advance sociogenomics
8. Sam Houston State studies DNA preservation in mass disasters
9. Wistar receives $1.5 million Department of Defense grant to ready prostate drug for clinical use
10. Wayne State receives grant to reduce emissions of toxins by power plants into Great Lakes
11. Study highlights possible new approach to prostate cancer treatment
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/9/2016)... Mass., Feb. 9, 2016 Aware, Inc. (NASDAQ: AWRE ... financial results for its fourth quarter and year ended December 31, ... for the fourth quarter of 2015 was $6.9 million, an increase ... year. Operating income in the fourth quarter of 2015 was $2.6 ... --> --> Higher revenue ...
(Date:2/5/2016)... DUBLIN , Feb. 5, 2016 /PRNewswire/ ... the addition of the "Global Facial ... offering. --> http://www.researchandmarkets.com/research/5kvw8m/global_facial ) has ... Facial Recognition Market 2016-2020" report to ... Markets ( http://www.researchandmarkets.com/research/5kvw8m/global_facial ) has announced the ...
(Date:2/3/2016)... , February 3, 2016 ... market research report "Automated Fingerprint Identification System Market by ... Search), Application (Banking & Finance, Government, Healthcare, and Transportation) ... MarketsandMarkets, the market is expected to be worth USD ... 21.0% between 2015 and 2020. The transformation and technology ...
Breaking Biology News(10 mins):
(Date:2/12/2016)... , Feb. 12, 2016 Biocom, the association representing ... took a group of San Diego ... of its 2016 Precision Medicine Advocacy Fly-In. Biocom Fly-In participants ... and Drug Administration (FDA), the Centers for Medicare and Medicaid ... as San Diego U.S. Representatives Susan Davis and ...
(Date:2/12/2016)... N.J. , Feb. 12, 2016  PTC ... the second annual STRIVE (Strategies to Realize Innovation, ... muscular dystrophy (DMD). STRIVE provides funds to patient ... that will make meaningful contributions to the rare ... fostering development of future patient advocates. ...
(Date:2/11/2016)... 2016  Neurocrine Biosciences, Inc. (NASDAQ: NBIX ) today announced ... 2015. --> --> For ... of $29.3 million, or $0.34 loss per share, compared to a ... the same period in 2014. For the year ended December 31, ... $1.05 loss per share, as compared to a net loss of ...
(Date:2/11/2016)... , Feb. 11, 2016  Bioethics International, a not-for-profit ... are researched, developed, marketed and made accessible to patients around ... Open had named the publication of the Good ... The publication is also featured as one of BMJ ... the last year that are most frequently read. ...
Breaking Biology Technology: