Navigation Links
Scientists reveal the lifestyle evolution of wild marine bacteria
Date:5/22/2008

oblem, it is exceedingly difficult with microbes, because we have no species concept that would allow us to identify the genetic structure expected for populations. Microbial habitats differ on such small scales that they are invisible to us.

Polz and former graduate student Dana Hunt, now a postdoctoral researcher at the University of Hawaii, created a large and accurate genetic data set by isolating and identifying over 1,000 strains of vibrio bacteria from a sample of eight liters of seawater gathered near Plum Island, Mass., in the spring and fall. To achieve accuracy in their identification of strains, they selected a gene whose molecular clockthe rate at which a gene accumulates random mutations over timewas well-suited to the task.

The trick in many ways is choosing a gene that has a molecular clock that ticks at the right rate, said Polz. In particular, if its too slow, you might lump organisms into a single group that you would actually like to differentiate. We chose a gene that accumulates mutations fairly fast and thus allowed us to differentiate closely related groups of individuals and map the ecological data we collected onto their family tree.

Alm and graduate student Lawrence David wrote an algorithm to make a conservative estimate of the minimum number of different habitats occupied by the vibrios (whether they live on small or large particles and thrive in the cool or warm months, etc.). They then combined information about habitat with phylogeny (the evolutionary history of groups of genes), and apportioned the original strains into 25 distinct populations and mapped their habitats back to a common ancestor, showing when and how each group diverged from the ancestral lifestyle.

What is really new about our approach is that we were able to combine both molecular data (DNA sequences) with ecological data in a single mathematical framework, said Alm. This allowed us to solve the inverse problem of taking samples
'/>"/>

Contact: Denise Brehm
brehm@mit.edu
617-253-8069
Massachusetts Institute of Technology, Department of Civil and Environmental Engineering
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Scientists discover a molecular scaffold that guides connections between brain cells
2. Scientists paint viruses to track their fate in the body
3. Incense is psychoactive: Scientists identify the biology behind the ceremony
4. Scientists decipher fruit tree genome for the first time
5. Scientists discover small RNAs that regulate gene expression and protect the genome
6. Argonne scientists use lasers to align molecules
7. Too hot to handle! Scientists identify heat sensing regulator
8. Scientists dig deeper into the genetics of schizophrenia by evaluating microRNAs
9. Scientists endure Arctic for last campaign prior to CryoSat-2 launch
10. Scientists discover why plague is so lethal
11. UF scientists discover compound that could lead to new blood pressure drugs
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists reveal the lifestyle evolution of wild marine bacteria
(Date:9/18/2014)... 18, 2014 -- Arizona turned its newborn screening program into ... short months, earning it the first-ever Newborn Screening Quality Award ... Dimes presented Will Humble, M.P.H., Arizona,s Department of Health Services ... Mr. Humble established a policy of full transparency for the ... blood samples to the lab for analysis, and set a ...
(Date:9/18/2014)... and nitrogen comprise all spheres of our planet. ... caused imbalances and perturbations that resulted in increases ... result in climate changes which influence the complex ... atmosphere. Understanding these feedback mechanisms has become an ... during the past three decades. , In parallel, ...
(Date:9/18/2014)... larvae can swim up to 400 kilometres in search of ... environmental change. , Clownfish spend their entire adult lives under ... must wander the open ocean, says study co-author, Dr Hugo ... Studies (Coral CoE) at James Cook University. , "In the ... been given a rare glimpse into how far they can ...
Breaking Biology News(10 mins):March of Dimes honors Arizona with first-ever newborn screening award 2March of Dimes honors Arizona with first-ever newborn screening award 3Greenhouse gas research enters a new era 2Nemo's epic journey to find a new home 2
... (SACRAMENTO, Calif.) Smokers who don,t quit before ... neck cancers fair significantly worse than those who do, ... Allen Chen, an assistant professor in the Department ... found that head- and neck-cancer patients who continue to ...
... This press release is available in French . ... most deadly parasitic diseases in the world. It affects more than ... it kills 50 000 people each year. A reliable and rapid ... now, this has been next to impossible. Dr. Momar Ndao and ...
... America needs more vitamin D. It,s one more reason to ... at the Experimental Biology conference in Anaheim, California. Milk is ... supplying nearly half of all of the much-needed vitamin D. ... what more than 16,000 Americans ages two and older eat, ...
Cached Biology News:Smoking during radiation therapy for head and neck cancers linked to poorer outcomes 2Smoking during radiation therapy for head and neck cancers linked to poorer outcomes 3Major breakthrough in the diagnosis of parasitic diseases 2
(Date:9/19/2014)... , Sept. 19, 2014 Pfenex Inc. (NYSE ... development of high-value and difficult to manufacture proteins including ... at the 21 st Annual NewsMakers in the ... . Bertrand Liang , chief executive officer of ... programs and business strategy on Friday, September 26, 2014 ...
(Date:9/19/2014)... , The first grants awarded ... Endocrinology (ESPE) Meeting  Investment supports innovative projects ... the field of growth  , EMD Serono, ... , today announced the first recipients of the ... were announced during a Satellite Symposium organized by EMD ...
(Date:9/18/2014)... -- DeepResearchReports.com adds "2014 Deep Research Report on ... Deep Research Report on Global and China Sodium ... Photo - http://photos.prnewswire.com/prnh/20140918/147058 ... China Acetic Acid Industry" is a professional and ... and Global Acetic Acid Market. The report ...
(Date:9/18/2014)... 18, 2014 On Tuesday, Secretary of ... Jim Risch for National Lab Day on the Hill. ... the national laboratory system. Durbin and Risch also formally ... increase awareness of the reach of the national labs ... to address some of our nation's most pressing challenges. ...
Breaking Biology Technology:Pfenex to Present at Upcoming Industry Conference on September 26 2EMD Serono Awards Grant for Growth Innovation (GGI) for the First Time 2EMD Serono Awards Grant for Growth Innovation (GGI) for the First Time 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 2Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 4Lab Day Highlight Labs' Contribution to U.S. Competitiveness and Innovation 2Lab Day Highlight Labs' Contribution to U.S. Competitiveness and Innovation 3
... Bio Corporation says its scientists have developed a ... ,Antibodies, naturally part of the immune system, are manufactured ... or research. Mirus' new technique, described in the February ... whose immune systems produce the antibodies that are harvested ...
... — Inacom Information Systems was awarded ... company's annual partner summit in San Diego, California. , ... campaign, which the company said drew 47 interested companies ... an implementation of wireless technology. , ,The campaign began ...
... Cyber Defense Agency, an information security consulting ... said it has been chosen to challenge eight student ... are increasing in complexity and sophistication, so it's essential ... the next generation of cyber defenders," said Sami Saydjari, ...
Cached Biology Technology:
Mouse polyclonal antibody raised against a partial recombinant DDEF2. NCBI Entrez Gene ID = 8853...
Mouse monoclonal antibody raised against a full length recombinant SCGB3A2. NCBI Entrez Gene ID = SCGB3A2...
Mouse monoclonal antibody raised against a partial recombinant QARS. NCBI Entrez Gene ID = QARS...
Mouse polyclonal antibody raised against a partial recombinant QPCT. NCBI Entrez Gene ID = 25797...
Biology Products: