Doe Science news source
The DOE Science News Source is a Newswise initiative to promote research news from the Office of Science of the DOE to the public and news media.
  • 2017-10-11 15:05:07
  • Article ID: 682558

Tiny Green Algae Reveal Large Genomic Variation

First complete picture of genetic variations in a natural algal population could help explain how environmental changes affect global carbon cycles.

  • Credit: Image courtesy of Martin Hohmann-Marriott

    Transmission electron microscopy image of Ostreococcus tauri strain RCC4221.

The Science

Although they are invisible to the unaided eye, tiny green algae called Ostreococcus play a big role in how carbon, including carbon dioxide (CO2), cycle through our world. Researchers have sequenced and analyzed the complete set of genes (the genome) of 13 members of a natural Ostreococcus population. The analysis revealed that the O. tauri population is larger than anticipated. It’s also diverse in terms of its genetics and appearance. The algae’s natural resistance to ocean viruses influenced the algae’s diversity.

The Impact

Ostreococcus is a model species to study algae in marine environments. Though microscopic, these picoplankton use sunlight together with CO2 to create organic matter. The algae are significant primary producers (that is, they convert CO2 into biomass). Thus, the algae contribute to the global carbon cycle. This study offers insights into the genetic variability of various Ostreococcus strains. The results will help scientists see how environmental changes affect algae’s ability to survive and thrive.

Summary

Picophytoplankton such as Ostreococcus are so small they are invisible to the naked eye. Despite their size, their global abundance means they are a widespread primary producer and form the bases of several marine food webs. In coastal areas, they account for as much as 80 percent of the available biomass. A decade ago, the Joint Genome Institute (JGI), a U.S. Department of Energy (DOE) Office of Science user facility, sequenced one of the Ostreococcus strains. That genome, along with other genome sequences from three groups of the picophytoplankton Ostreococcus, revealed the tiny algae’s diversity and adaptation to different ecological niches around the world.

Now, a team led by researchers at the Oceanological Observatory of Banyuls, France, and including scientists at the DOE JGI, has resequenced and analyzed 13 members of a natural population of Ostreococcus tauri from the northwest Mediterranean Sea. The analysis offers a complete picture on the surprisingly large population and correspondingly high genetic and phenotypic diversity within O. tauri species. The team identified two large candidate mating type loci, consistent with the pervasive evidence of recombination and thus sexual reproduction within the population. The work reported in Science Advances was enabled in part by the DOE JGI’s Community Science Program. A deeper understanding of algal genomic diversity and potential will help scientists track carbon (and nitrogen) traffic through marine ecosystems as well as provide insights into the structure and operation of algal plant communities.

Funding

Work was conducted by the U.S. Department of Energy (DOE) Joint Genome Institute, a DOE Office of Science user facility (contract DE-AC02-05CH11231). This work was also supported by the European Community’s 7th Framework program FP7 and the Agence Nationale de la Recherche (contract ANR-13-JSV6-0005).

Publication

R. Blanc-Mathieu, M. Krasovec, M. Hebrard, S. Yau, E. Desgranges, J. Martin, W. Schackwitz, A. Kuo, G. Salin, C. Donnadieu, Y. Desdevises, S. Sanchez-Ferandin, H. Moreau, E. Rivals, I. Grigoriev, N. Grimsle, A. Eyre-Walker, and G. Piganeau, “Population genomics of picophytoplankton unveils novel chromosome hypervariability.” Science Advances 3(7), e1700239 (2017). [DOI: 10.1126/sciadv.1700239]

X
X
X
  • Filters

  • × Clear Filters

Taming 'Wild' Electrons in Graphene

Graphene - a one-atom-thick layer of the stuff in pencils - is a better conductor than copper and is very promising for electronic devices, but with one catch: Electrons that move through it can't be stopped. Until now, that is. Scientists at Rutgers University-New Brunswick have learned how to tame the unruly electrons in graphene, paving the way for the ultra-fast transport of electrons with low loss of energy in novel systems. Their study was published online in Nature Nanotechnology.

On-Demand 3-D Printing of Tiny Magic Wands

Direct writing of pure-metal structures may advance novel light sources, sensors and information storage technologies.

Heavy Quarks Probe the Early Universe

New studies of behaviors of particles containing heavy quarks shed light into what the early universe looked like in its first microseconds.

Cool Roofs Have Water Saving Benefits Too

The energy and climate benefits of cool roofs have been well established: By reflecting rather than absorbing the sun's energy, light-colored roofs keep buildings, cities, and even the entire planet cooler. Now a new study by the Department of Energy's Lawrence Berkeley National Laboratory has found that cool roofs can also save water by reducing how much is needed for urban irrigation.

The Blob That Ate the Tokamak: Physicists Gain Understanding of How Bubbles at the Edge of Plasmas Can Drain Heat and Reduce Fusion Reaction Efficiency

Scientists at PPPL have completed new simulations that could provide insight into how blobs at the plasma edge behave. The simulations, produced by a code called XGC1 developed by a national team based at PPPL, performed kinetic simulations of two different regions of the plasma edge simultaneously.

Scientists Solve a Magnesium Mystery in Rechargeable Battery Performance

A Berkeley Lab-led research team has discovered a surprising set of chemical reactions involving magnesium that degrade battery performance even before the battery can be charged up. The findings could steer the design of next-gen batteries.

Extreme Light Trapping

Shawn-Yu Lin, professor of physics, applied physics, and astronomy at Rensselaer Polytechnic Institute, has built a nanostructure whose crystal lattice bends light as it enters the material and directs it in a path parallel to the surface, known as "parallel to interface refraction."

Researchers Customize Catalysts to Boost Product Yields, Decrease Chemical Separation Costs

For some crystalline catalysts, what you see on the surface is not always what you get in the bulk, according to two studies led by the Department of Energy's Oak Ridge National Laboratory.

Innovative Design Using Loops of Liquid Metal Can Improve Future Fusion Power Plants, Scientists Say

Article describes proposed design for production of steady-state plasma in future fusion power plants.

Scientists Create Most Powerful Micro-Scale Bio-Solar Cell Yet

Researchers at Binghamton University, State University of New York have created a micro-scale biological solar cell that generates a higher power density for longer than any existing cell of its kind.


  • Filters

  • × Clear Filters

Two ORNL-Led Research Teams Receive $10.5 Million to Advance Quantum Computing for Scientific Applications

DOE's Office of Science has awarded two research teams, each headed by a member of ORNL's Quantum Information Science Group, more than $10 million over 5 years to both assess the feasibility of quantum architectures in addressing big science problems and to develop algorithms capable of harnessing the massive power predicted of quantum computing systems. The two projects are intended to work in concert to ensure synergy across DOE's quantum computing research spectrum and maximize mutual benefits.

Department of Energy Awards Flow Into Argonne

DOE Secretary Rick Perry awarded Argonne with nearly $4.7 million in projects as part of the DOE's Office of Technology Transition's Technology Commercialization Fund (TCF) in September.

NIH Awards $6.5 Million to Berkeley Lab for Augmenting Structural Biology Research Experience

The NIH has awarded $6.5 million to Berkeley Lab to integrate existing synchrotron structural biology resources to better serve researchers. The grant will establish a center based at the Lab's Advanced Light Source (ALS) called ALS-ENABLE that will guide users through the most appropriate routes for answering their specific biological questions.

LIGO Announces Detection of Gravitational Waves From Colliding Neutron Stars

The U.S.-based Laser Interferometer Gravitational-Wave Observatory and the Virgo detector in Italy announced on Oct. 16 that all three of their detectors had picked up the ripples, or gravitational waves, from two neutron stars that collided 130 million years ago. Among other discoveries, the detection allowed scientists to use gravitational waves to directly calculate the rate at which the universe is expanding.

WVU Energy Conference to Address State's Economic Opportunities

West Virginia University will look at the state's emerging energy economy through industry experts, public policy organizations, environmental groups and academic institutions at the sixth annual National Energy Conference Oct. 20.

Exploring the Exotic World of Quarks and Gluons at the Dawn of the Exascale

As nuclear physicists delve ever deeper into the heart of matter, they require the tools to reveal the next layer of nature's secrets. Nowhere is that more true than in computational nuclear physics. A new research effort led by theorists at DOE's Thomas Jefferson National Accelerator Facility (Jefferson Lab) is now preparing for the next big leap forward in their studies thanks to funding under the 2017 SciDAC Awards for Computational Nuclear Physics.

Matthew Latimer Receives 2017 Lytle Award

A staff member at the Department of Energy's SLAC National Acceleratory Laboratory, Matthew Latimer is in charge of seven spectroscopy beamlines at SSRL. He was recently selected for the 2017 Farrel W. Lytle Award, established by the SSRL Users' Organization Executive Committee. The award promotes accomplishments in synchrotron science and supports collaboration among visiting scientists and staff who conduct research at SSRL.

Jefferson Lab Completes 12 GeV Upgrade

Nuclear physicists are now poised to embark on a new journey of discovery into the fundamental building blocks of the nucleus of the atom. The completion of the 12 GeV Upgrade Project of the Continuous Electron Beam Accelerator Facility (CEBAF) at the Department of Energy's Thomas Jefferson National Accelerator Facility (Jefferson Lab) heralds this new era to image nuclei at their deepest level.

Sunderrajan to Lead Science and Technology Partnerships and Outreach Directorate

Suresh Sunderrajan has been named the associate laboratory director (ALD) for the Science and Technology Partnerships and Outreach (STPO) Directorate at the U.S. Department of Energy's Argonne National Laboratory.

Career Awards Advance Research for Jefferson Lab Researchers

Two researchers affiliated with the U.S. Department of Energy's Thomas Jefferson National Accelerator Facility have received 2017 Early Career Research Program awards from the DOE's Office of Science.


  • Filters

  • × Clear Filters

On-Demand 3-D Printing of Tiny Magic Wands

Direct writing of pure-metal structures may advance novel light sources, sensors and information storage technologies.

Heavy Quarks Probe the Early Universe

New studies of behaviors of particles containing heavy quarks shed light into what the early universe looked like in its first microseconds.

Discovering the Genetic Timekeepers in Bioenergy Crops

A new class of plant-specific genes required for flowering control in temperate grasses is found.

New Technology Illuminates Microbial Dark Matter

Demonstrating the microfluidic-based, mini-metagenomics approach on samples from hot springs shows how scientists can delve into microbes that can't be cultivated in a laboratory.

Tiny Green Algae Reveal Large Genomic Variation

First complete picture of genetic variations in a natural algal population could help explain how environmental changes affect global carbon cycles.

A Complex Little Alga that Lives by the Sea

The genetic material of Porphyra umbilicalis reveals the mechanisms by which it thrives in the stressful intertidal zone at the edge of the ocean.

Precise Radioactivity Measurements: A Controversy Settled

Simultaneous measurements of x-rays and gamma rays emitted in radioactive nuclear decays show that the vacancy left by an electron's departure, not the atomic structure, influences whether gamma rays are released.

OLYMPUS Experiment Sheds Light on Inner Workings of Protons

Seven-year study explains how packets of light are exchanged when protons meet electrons.

Explorations of the Universal Glue

The newly upgraded CEBAF Accelerator opens door to strong force studies.

Understanding the Rice Genome for Bioenergy Research

Genome-wide rice studies yield first major, large-scale collection of mutations for grass model crops, vital to boosting biofuel production.


Spotlight

Tuesday October 03, 2017, 01:05 PM

Stairway to Science

Argonne National Laboratory

Thursday September 28, 2017, 12:05 PM

After-School Energy Rush

Argonne National Laboratory

Thursday September 28, 2017, 10:05 AM

Bringing Diversity Into Computational Science Through Student Outreach

Brookhaven National Laboratory

Thursday September 21, 2017, 03:05 PM

From Science to Finance: SLAC Summer Interns Forge New Paths in STEM

SLAC National Accelerator Laboratory

Thursday September 07, 2017, 02:05 PM

Students Discuss 'Cosmic Opportunities' at 45th Annual SLAC Summer Institute

SLAC National Accelerator Laboratory

Thursday August 31, 2017, 05:05 PM

Binghamton University Opens $70 Million Smart Energy Building

Binghamton University, State University of New York

Wednesday August 23, 2017, 05:05 PM

Widening Horizons for High Schoolers with Code

Argonne National Laboratory

Saturday May 20, 2017, 12:05 PM

Rensselaer Polytechnic Institute Graduates Urged to Embrace Change at 211th Commencement

Rensselaer Polytechnic Institute (RPI)

Monday May 15, 2017, 01:05 PM

ORNL, University of Tennessee Launch New Doctoral Program in Data Science

Oak Ridge National Laboratory

Friday April 07, 2017, 11:05 AM

Champions in Science: Profile of Jonathan Kirzner

Department of Energy, Office of Science

Wednesday April 05, 2017, 12:05 PM

High-Schooler Solves College-Level Security Puzzle From Argonne, Sparks Interest in Career

Argonne National Laboratory

Tuesday March 28, 2017, 12:05 PM

Champions in Science: Profile of Jenica Jacobi

Department of Energy, Office of Science

Friday March 24, 2017, 10:40 AM

Great Neck South High School Wins Regional Science Bowl at Brookhaven Lab

Brookhaven National Laboratory

Wednesday February 15, 2017, 04:05 PM

Middle Schoolers Test Their Knowledge at Science Bowl Competition

Argonne National Laboratory

Friday January 27, 2017, 04:00 PM

Haslam Visits ORNL to Highlight State's Role in Discovering Tennessine

Oak Ridge National Laboratory

Tuesday November 08, 2016, 12:05 PM

Internship Program Helps Foster Development of Future Nuclear Scientists

Oak Ridge National Laboratory

Friday May 13, 2016, 04:05 PM

More Than 12,000 Explore Jefferson Lab During April 30 Open House

Thomas Jefferson National Accelerator Facility

Monday April 25, 2016, 05:05 PM

Giving Back to National Science Bowl

Ames Laboratory

Friday March 25, 2016, 12:05 PM

NMSU Undergrad Tackles 3D Particle Scattering Animations After Receiving JSA Research Assistantship

Thomas Jefferson National Accelerator Facility

Tuesday February 02, 2016, 10:05 AM

Shannon Greco: A Self-Described "STEM Education Zealot"

Princeton Plasma Physics Laboratory

Monday November 16, 2015, 04:05 PM

Rare Earths for Life: An 85th Birthday Visit with Mr. Rare Earth

Ames Laboratory

Tuesday October 20, 2015, 01:05 PM

Meet Robert Palomino: 'Give Everything a Shot!'

Brookhaven National Laboratory

Tuesday April 22, 2014, 11:30 AM

University of Utah Makes Solar Accessible

University of Utah

Wednesday March 06, 2013, 03:40 PM

Student Innovator at Rensselaer Polytechnic Institute Seeks Brighter, Smarter, and More Efficient LEDs

Rensselaer Polytechnic Institute (RPI)

Friday November 16, 2012, 10:00 AM

Texas Tech Energy Commerce Students, Community Light up Tent City

Texas Tech University

Wednesday November 23, 2011, 10:45 AM

Don't Get 'Frosted' Over Heating Your Home This Winter

Temple University

Wednesday July 06, 2011, 06:00 PM

New Research Center To Tackle Critical Challenges Related to Aircraft Design, Wind Energy, Smart Buildings

Rensselaer Polytechnic Institute (RPI)

Friday April 22, 2011, 09:00 AM

First Polymer Solar-Thermal Device Heats Home, Saves Money

Wake Forest University

Friday April 15, 2011, 12:25 PM

Like Superman, American University Will Get Its Energy from the Sun

American University

Thursday February 10, 2011, 05:00 PM

ARRA Grant to Help Fund Seminary Building Green Roof

University of Chicago

Tuesday December 07, 2010, 05:00 PM

UC San Diego Installing 2.8 Megawatt Fuel Cell to Anchor Energy Innovation Park

University of California San Diego

Monday November 01, 2010, 12:50 PM

Rensselaer Smart Lighting Engineering Research Center Announces First Deployment of New Technology on Campus

Rensselaer Polytechnic Institute (RPI)

Friday September 10, 2010, 12:40 PM

Ithaca College Will Host Regional Clean Energy Summit

Ithaca College

Tuesday July 27, 2010, 10:30 AM

Texas Governor Announces $8.4 Million Award to Create Renewable Energy Institute

Texas Tech University

Friday May 07, 2010, 04:20 PM

Creighton University to Offer New Alternative Energy Program

Creighton University

Wednesday May 05, 2010, 09:30 AM

National Engineering Program Seeks Subject Matter Experts in Energy

JETS Junior Engineering Technical Society

Wednesday April 21, 2010, 12:30 PM

Students Using Solar Power To Create Sustainable Solutions for Haiti, Peru

Rensselaer Polytechnic Institute (RPI)

Wednesday March 03, 2010, 07:00 PM

Helping Hydrogen: Student Inventor Tackles Challenge of Hydrogen Storage

Rensselaer Polytechnic Institute (RPI)

Thursday February 04, 2010, 02:00 PM

Turning Exercise into Electricity

Furman University

Thursday November 12, 2009, 12:45 PM

Campus Leaders Showing the Way to a Sustainable, Clean Energy Future

National Wildlife Federation (NWF)

Tuesday November 03, 2009, 04:20 PM

Furman University Receives $2.5 Million DOE Grant for Geothermal Project

Furman University

Thursday September 17, 2009, 02:45 PM

Could Sorghum Become a Significant Alternative Fuel Source?

Salisbury University

Wednesday September 16, 2009, 11:15 AM

Students Navigating the Hudson River With Hydrogen Fuel Cells

Rensselaer Polytechnic Institute (RPI)

Wednesday September 16, 2009, 10:00 AM

College Presidents Flock to D.C., Urge Senate to Pass Clean Energy Bill

National Wildlife Federation (NWF)

Wednesday July 01, 2009, 04:15 PM

Northeastern Announces New Professional Master's in Energy Systems

Northeastern University

Friday October 12, 2007, 09:35 AM

Kansas Rural Schools To Receive Wind Turbines

Kansas State University

Thursday August 17, 2006, 05:30 PM

High Gas Prices Here to Stay, Says Engineering Professor

Rowan University





Showing results

0-4 Of 2215