HOME >> BIOLOGY >> NEWS
Time to rewrite the species rulebook, MSU scientists say

EAST LANSING, Mich. - From person to piranha to petunia, it's pretty easy to spot different species in the human-scale part of the plant and animal kingdoms. But a new study shows that species differences aren't so clear, at least as currently measured, when it comes to microscopic bacteria.

MSU researchers have spotted significant differences in genetic libraries among thought-to-be similar bacteria strains. The results, published this week in the journal the Proceedings of the National Academy of Sciences, suggest that new definitions are needed to catalogue bacteria single-celled organisms with at least a 3.5 billion-year history.

"It's important to point out the importance of these small microbes on Earth; even though they are small, their mass in soil and water is equal to that of all plants," said MSU microbiologist James Tiedje, one of the study's authors. "Furthermore, they are responsible for recycling the key elements of life so life on Earth can continue."

DNA, used by all life including bacteria to store genetic information, is a double-stranded molecule. When a given DNA molecule is split in two, for instance by heating it up, its two strands will spontaneously find each other, or reassociate, when the temperature drops.

Scientists have long exploited this fact in their rough rule-of-thumb approach for saying just what makes up a species of bacteria. Single strands of DNA from two bacteria are mixed together. If most of these strands reassociate specifically, if 70 percent of strands from bacteria A come together with strands from bacteria B then the two bacteria strains are said to members of the same species.

Tiedje and his MSU colleague, microbiologist Konstantinos Konstantinidis, set out to put this mix and match approach to the test. The two scientists selected 70 related bacteria whose genomes, or complete genetic libraries, had been fully sequenced.

A sequenced genome gives scientists what amounts to a
'"/>

Contact: Jim Tiedje
tiedje@msu.edu
517-355-0271
Michigan State University
8-Feb-2005


Page: 1 2 3

Related biology news :

1. New study rewrites evolutionary history of vespid wasps
2. Tiny bones rewrite textbooks
3. West Australian fossil find rewrites land mammal evolution
4. Finding rewrites the evolutionary history of the origin of potatoes
5. Lost forest yields several new species
6. Surprising new species of light-harvesting bacterium discovered in Yellowstone
7. Smithsonians National Zoo researchers use electronic eggs to help save threatened species
8. One species, many genomes
9. Reconstructing the biology of extinct species: A new approach
10. Researchers find 24 species believed new to science in Suriname rainforest
11. Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/1/2016)... NEW YORK , June 1, 2016 ... Biometric Technology in Election Administration and Criminal Identification to ... According to a recently released TechSci Research report, " ... Sector, By Region, Competition Forecast and Opportunities, 2011 - ... $ 24.8 billion by 2021, on account of growing ...
(Date:5/12/2016)... DALLAS , May 12, 2016 ... has just published the overview results from the Q1 ... of the recent wave was consumers, receptivity to a ... wearables data with a health insurance company. ... choose to share," says Michael LaColla , CEO ...
(Date:4/28/2016)... First quarter 2016:   , ... the first quarter of 2015 The gross margin was ... 18.8) and the operating margin was 40% (-13) Earnings ... flow from operations was SEK 249.9 M (21.2) , ... SEK 7,000-8,500 M. The operating margin for 2016 is ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... 27, 2016  Alex,s Lemonade Stand Foundation (ALSF), a ... will open a state-of-the-art bioinformatics lab, using ,big data, ... announcement comes as Liz Scott , co-executive director ... Moonshot Summit in Washington, D.C. , ... participant and advocate of pediatric cancer research and awareness. ...
(Date:6/27/2016)...  Global demand for enzymes is forecast to ... $7.2 billion.  This market includes enzymes used in ... production, animal feed, and other markets) and specialty ... and beverages will remain the largest market for ... products containing enzymes in developing regions.  These and ...
(Date:6/27/2016)... , June 27, 2016 /PRNewswire/ - BIOREM Inc. (TSX-V: ... been advised by its major shareholders, Clean Technology Fund ... United States based venture capital funds ... of Biorem (on a fully diluted, as converted basis), ... disposition of their entire equity holdings in Biorem to ...
(Date:6/27/2016)... , June 27, 2016  Sequenom, Inc. (NASDAQ: ... to enabling healthier lives through the development of innovative ... of the United States denied ... that the claims of Sequenom,s U.S. Patent No. 6,258,540 ... eligibility criteria established by the Supreme Court,s Mayo Collaborative ...
Breaking Biology Technology:
Cached News: