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:4/13/2017)... , April 13, 2017 UBM,s Advanced Design ... will feature emerging and evolving technology through its ... Summits will run alongside the expo portion of the ... panels and demonstrations focused on trending topics within 3D ... design and manufacturing event will take place June 13-15, 2017 ...
(Date:4/11/2017)... MELBOURNE, Florida , April 11, 2017 ... "Company"), a security technology company, announces the appointment of independent ... John Bendheim to its Board of Directors, furthering the ... ... behalf of NXT-ID, we look forward to their guidance and ...
(Date:4/4/2017)... --  EyeLock LLC , a leader of iris-based identity ... and Trademark Office (USPTO) has issued U.S. Patent No. ... iris image with a face image acquired in sequence ... th issued patent. "The issuance ... multi-modal biometric capabilities that have recently come to market ...
Breaking Biology News(10 mins):
(Date:7/26/2017)... 26, 2017  Nurse practitioners play a crucial role in ... a Merck Manuals survey released today. The survey ... that most (88 percent) believe they spend at least half ... ... Merck Manuals survey of 210 nurse practitioners finds that ...
(Date:7/25/2017)... CT (PRWEB) , ... July 25, 2017 , ... ... products that enhance the microbiome and improve efficiency of livestock farming while reducing ... that it has licensed additional intellectual property from Cornell University. , These ...
(Date:7/24/2017)... ... July 24, 2017 , ... Each year, ... who have proven their superior service quality as rated by hiring professionals and ... industry leader based on service quality ratings from their placed talent. , Fewer ...
(Date:7/20/2017)... ... July 20, 2017 , ... Resoundant, ... radiology and imaging centers around the U.S. that offer MR Elastography for liver ... to needle biopsy for staging liver fibrosis assessment. , “MRE:connect was created ...
Breaking Biology Technology:
Cached News: