Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Molecular barcodes – identification of 16 new species of Caenorhabditis

21.11.2011
Caenorhabditis are usually thought of as soil nematodes, happily living in compost heaps. The famous (scientifically speaking) Caenorhabditis elegans has provided a wealth of information about developmental processes and cell death.

These tiny worms have been at the forefront of three Nobel prizes and have even been sent into space! However all other known Caenorhabditis species are as distantly related to C. elegans as mouse is to man. New research published in BioMed Central's open access journal BMC Evolutionary Biology looked at the relationship between the ten known species of Caenorhabditis and found another 16. In the process it was discovered that these particular nematodes prefer to live in rotting fruit and vegetation rather than soil.

A team of researchers, led by Dr Karin Kiontke, from New York University, and Marie-Anne Félix, from the Institute Jacques Monod in Paris, delved into rotting vegetation collected from around the world. They found Caenorhabditis worms in samples from temperate and tropical climes across four continents, but only in those which contained rotting fruit or vegetable material. Some species, like C. elegans, were found in many locations, but others in only one.

'Worms' were separated according to physical characteristics such as color, tail length, and position of reproductive organs. True separation between species was determined by the animals being unable to mate or to produce viable offspring, and the species were molecular barcoded using the ITS2 regions of DNA.

Dr Kiontke explained, "Using our new data we were able to generate an evolutionary tree for all 26 species which showed that the history of Caenorhabditis has had many evolutionary reversals and convergences. For example, the spicules (the male reproductive organs) increased in length after the first species diverged from the Caenorhabditis ancestor, but decreased again in a more modern ancestor of five present-day species. Also, it is clear that hermaphroditism has evolved independently three times within the Caenorhabditis genus. The newly discovered species will be an important resource for future research and will doubtless teach us much more about the evolution of genomes, reproductive modes and development. Although we still have not yet found the elusive close relative for C. elegans we now know where to search."

Media Contact
Dr Hilary Glover
Scientific Press Officer, BioMed Central
Tel: 44-20-3192-2370
Email: hilary.glover@biomedcentral.com
Notes to Editors
1. A phylogeny and molecular barcodes for Caenorhabditis, with numerous new species from rotting fruits Karin C Kiontke, Marie-Anne Félix, Michael Ailion, Matthew V Rockman, Christian Braendle, Jean-Baptiste Pénigault and David HA Fitch BMC Evolutionary Biology (in press)

Please name the journal in any story you write. If you are writing for the web, please link to the article. All articles are available free of charge, according to BioMed Central's open access policy.

Article citation and URL available on request at press@biomedcentral.com on the day of publication.

2. BMC Evolutionary Biology is an Open Access, peer-reviewed online journal that considers articles on all aspects of molecular and non-molecular evolution of all organisms, as well as phylogenetics and palaeontology.

3. BioMed Central (http://www.biomedcentral.com/) is an STM (Science, Technology and Medicine) publisher which has pioneered the open access publishing model. All peer-reviewed research articles published by BioMed Central are made immediately and freely accessible online, and are licensed to allow redistribution and reuse. BioMed Central is part of Springer Science+Business Media, a leading global publisher in the STM sector.

Dr Hilary Glover | EurekAlert!
Further information:
http://www.biomedcentral.com

More articles from Life Sciences:

nachricht Nanoparticle Exposure Can Awaken Dormant Viruses in the Lungs
16.01.2017 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt

nachricht Cholera bacteria infect more effectively with a simple twist of shape
13.01.2017 | Princeton University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Multiregional brain on a chip

16.01.2017 | Power and Electrical Engineering

New technology enables 5-D imaging in live animals, humans

16.01.2017 | Information Technology

Researchers develop environmentally friendly soy air filter

16.01.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>