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:
TAG: Time rewrite the species rulebook MSU scientists say

(Date:10/31/2014)... University of Adelaide-led project has developed a new test ... against the H5N1 strain of avian influenza virus or ... , This is a significant step in the fight ... is widespread in the poultry populations of South East ... concern because of its possible transmission to humans and ...
(Date:10/31/2014)... 30, 2014  HITLAB SM , a healthcare ... its inaugural HITLAB Innovators Summit SM on ... HITLAB will partner with the Clinton Foundation,s Health ... ProtoHack, Columbia Business School Alumni Club of ... Engineering and Operations Research, bringing together leaders in ...
(Date:10/30/2014)... received a $1.04 million grant from the U.S. ... reduce osteoarthritis using a patient,s own stem cells, ... biodegradable polymers., Liping Tang, a bioengineering professor and ... research is primarily focused on helping soldiers who ... that if we inject microscaffolding that we,ve developed ...
Breaking Biology News(10 mins):New step towards eradication of H5N1 bird flu 2HITLAB Announces Inaugural HITLAB Innovators Summit 2HITLAB Announces Inaugural HITLAB Innovators Summit 3UTA researcher uses microscaffolding injections to mend cartilage, prevent osteoarthritis 2
(Date:10/31/2014)... (PRWEB) October 31, 2014 Stronger ... healthcare, construction, finance and consumer electronics will help ... reason, industry research firm IBISWorld has added a ... its growing industry report collection. , The Biometrics ... for biometric technologies such as fingerprint, iris, retina ...
(Date:10/30/2014)... 30, 2014 The report “Fragrance Ingredients ... Application (Cosmetics & Toiletries, and Soaps & Detergents) & ... has defined and segmented the Fragrance Ingredients Market with ... terms of value. The market has been segmented on ... Europe, Asia-Pacific, Latin America, and Rest of the World ...
(Date:10/30/2014)... 29, 2014 Global polyvinyl chloride (PVC) ... economic crisis during 2008-2009, especially in North America and ... currently is keeping to a growing trend. , The ... utilized in the construction segment. In 2013, the key ... tubing, sheets and rigid film. Moreover, the PVC was ...
(Date:10/30/2014)... (PRWEB) October 30, 2014 ... collaboration provider, offers Office 365 end users the ... a complete phone system by adding voice enablement ... (O365) includes Lync Online, a communication tool that ... calls. With hosted voice, O365 becomes a comprehensive ...
Breaking Biology Technology:Biometrics Scan Software in the US Industry Market Research Report Now Available from IBISWorld 2Biometrics Scan Software in the US Industry Market Research Report Now Available from IBISWorld 3Fragrance Ingredients Market worth $17,104.21 Million by 2019 - New Report by MarketsandMarkets 2Fragrance Ingredients Market worth $17,104.21 Million by 2019 - New Report by MarketsandMarkets 3Fragrance Ingredients Market worth $17,104.21 Million by 2019 - New Report by MarketsandMarkets 4Fragrance Ingredients Market worth $17,104.21 Million by 2019 - New Report by MarketsandMarkets 5Global Polyvinyl Chloride Demand Is on Upward Trend Now, Says Merchant Research & Consulting in Its Topical Study 2Global Polyvinyl Chloride Demand Is on Upward Trend Now, Says Merchant Research & Consulting in Its Topical Study 3SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 2SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 3
Cached News: