Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

MSU team overcomes challenges, proves that microbes swim to hydrogen gas

11.11.2013
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 noted 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 cyclingof 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.

Lead author of the study was Kristen Brileya, a former student of Fields’ in the CBE and MSU’s Department of Microbiology. Co-authors in addition to Fields were James Connolly, a current graduate student in the CBE and Department of Chemical and Biological Engineering; Carey Downey, a previous undergraduate student in the Department of Microbiology; and Robin Gerlach, faculty member in the CBE and Department of Chemical and Biological Engineering.

Funding for the project was provided by the U.S. Department of Energy and the National Science Foundation.

Evelyn Boswell, (406) 994-5135 or evelynb@montana.edu

Evelyn Boswell | EurekAlert!
Further information:
http://www.montana.edu

Further reports about: Biofilm chemical engineering hydrogen gas microbiology

More articles from Life Sciences:

nachricht Decoding the genome's cryptic language
27.02.2017 | University of California - San Diego

nachricht New risk factors for anxiety disorders
24.02.2017 | Julius-Maximilians-Universität Würzburg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Safe glide at total engine failure with ELA-inside

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded after a glide flight with an Airbus A320 in ditching on the Hudson River. All 155 people on board were saved.

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded...

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

New pop-up strategy inspired by cuts, not folds

27.02.2017 | Materials Sciences

Sandia uses confined nanoparticles to improve hydrogen storage materials performance

27.02.2017 | Interdisciplinary Research

Decoding the genome's cryptic language

27.02.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>