Navigation Links
Earth history and evolution
Date:5/3/2012

In classical mythology, the cypress tree is associated with death, the underworld and eternity. Indeed, the family to which cypresses belong, is an ancient lineage of conifers, and a new study of their evolution affords a unique insight into a turbulent era in the Earth's history.

During the geological era known as the Mesozoic, the continental crust was concentrated in a single huge landmass, the supercontinent Pangea. Pangea began to break up about 150 million years ago, and the fragments drifted apart, eventually giving rise to the disposition of continents we know today. The progressive break-up of such a large landmass meant that existing groups of plant and animal species were split apart, and the descendant lineages then evolved in isolation from each other.

Dating divergence with the molecular clock

"Fossils show that the cypress family is a very ancient group of plants," says LMU biologist Professor Susanne Renner, who is also Director of the Munich Botanic Garden. "We therefore suspected that it might be possible to follow their evolutionary history back to the period before the break-up of Pangea, as long as the many episodes of climate change and associated extinctions had not obscured things too much." Renner and her research group therefore set out to reconstruct the cypress family tree, based on the comparison of specific gene sequences from 122 species belonging to 32 genera reflecting the family's worldwide distribution. In order to date divergence events, they applied the concept of the molecular clock.

The idea is based on a simple principle. When two lineages diverge from a common ancestor, each accumulates genetic substitutions independent from the other. To a first approximation, the number of unique substitutions provides a measure of the time that has elapsed since a species diverged from its sister species. By comparing the spectra of genetic changes found in different lineages and calibrating
'/>"/>

Contact: Dr. Kathrin Bilgeri
kathrin.bilgeri@lmu.de
49-892-180-6938
Ludwig-Maximilians-Universitt Mnchen
Source:Eurekalert

Page: 1 2

Related biology news :

1. Send your name around the Earth on NASAS Glory mission
2. Earth scientists keep an eye on Texas
3. Barcelona Declaration 2008: Challenges and Pathways to Earth Sustainability
4. Research center to free chemistry from Earths bonds
5. ICSU launches new program to understand the human impact on Earths life-support systems
6. Earthworm activity can alter forests carbon-carrying capabilities
7. Similarities in imaging the human body, Earths crust focus of conference at UH
8. September 2007 Sumatran earthquakes research findings
9. Earths original ancestor was LUCA, not Adam nor Eve
10. To improve forecasting earthquakes, NJIT mathematician studies grains
11. Census of Marine Life and ocean in Google Earth bring ocean information to life
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/10/2014)... Dec. 08, 2014 Research and Markets ... of the "Biometrics Market in Japan 2014-2018" ... http://photos.prnewswire.com/prnh/20130307/600769 The integration ... as rural banking and upgradation of the driver,s ... in the market. Besides the aforementioned projects, biometrics ...
(Date:12/4/2014)... , Dec. 3, 2014  Crossmatch™, a ... announced that its DigitalPersona ® Pro Enterprise ... have been deployed throughout First Bank branch locations ... South Carolina and Virginia. First Bank, ... Southern Pines, North Carolina , selected ...
(Date:11/21/2014)... -- Earlier this year Donald Spector , Chairman of ... the most prolific inventors in the world, got a ... to third party agencies. Spector envisioned this technology even ... earliest known patents in this area. Now major technology ... care, elder care and hospital applications. This technology has ...
Breaking Biology News(10 mins):Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 2Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 4
... (BMC) and Boston University School of Public Health (BUSPH) ... at home are less likely to receive colorectal cancer ... English at home. The findings, which currently appear on-line ... patient-provider language barriers play a role in health-care disparities, ...
... to Secretary Kathleen Sebelius at the U.S. Department of ... called out 10 specific challenges to proposed modifications to ... on behalf of its membership of 4,000 informatics professionals, ... of Proposed Rulemaking (NPRM) on HIPAA modifications, along with ...
... frigatebird may be the least likely animal on the ... turns out the Galapagos population of this tropical seabird ... new conservation status, according to a paper by researchers ... Museum of Natural History and the University of Missouri-St. ...
Cached Biology News:Study finds language barriers may play role in health care disparities 2AMIA cites concerns about proposed HIPAA modifications 2AMIA cites concerns about proposed HIPAA modifications 3AMIA cites concerns about proposed HIPAA modifications 4Smithsonian researchers find differences between Galapagos and mainland frigatebirds 2
(Date:12/17/2014)... December 16, 2014 “Never say, ... Philipps- Universität Marburg’s Department of Physics, advises young ... the newly released SPIE Women in Optics ... too shy to ask questions.” , In the ... and mathematics) occupations ranging from university professor and ...
(Date:12/17/2014)... December 17, 2014 Xeno Diagnostics ... following its most recent COLA inspection. Xeno has ... a national healthcare accreditation organization. Accreditation is earned ... quality in day-to-day operations, demonstrate continued accuracy in ... rigorous on-site laboratory survey. , While ...
(Date:12/17/2014)... Md. , Dec. 17, 2014 CASI ... company dedicated to the acquisition, development and commercialization of ... for the global market with a primary commercial focus ... it has been granted a Type C meeting with ... the meeting will be held in February 2015.  During ...
(Date:12/15/2014)... DIEGO , Dec. 15, 2014 ... three-dimensional biology company focused on delivering breakthrough 3D ... the industry and collaborators of its exVive3D TM ... made widely available in full commercial release on ... the field, resulting in several awards for innovation. ...
Breaking Biology Technology:Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 3Xeno Diagnostics Receives 3rd Award for Laboratory Excellence 2CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 2CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 3CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 4CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 5Organovo Celebrates a Positive 2014 Reception of its exVive3DTM Human Liver Tissue Product 2Organovo Celebrates a Positive 2014 Reception of its exVive3DTM Human Liver Tissue Product 3
... Chilcott,Limited (Nasdaq: WCRX ) announced today that LEO ... from the U.S. Patent and,Trademark Office (the "USPTO"). In ... Patent No. 6,753,013 (the "013 Patent") in,response to a ... TACLONEX,and certain of LEO,s products in development. Warner Chilcott ...
... 17 Diageo (NYSE: DEO ),the world,s leading ... sponsorship of a physician,s training program in screening and ... State of,New York (MSSNY). The program, funded entirely ... better prepare physicians to address and assess issues,related to ...
... LMNX ) today announced that management will present ... held September,17-20, 2007, at the St. Regis Hotel in ... Balthrop, president and chief,executive officer, will begin at 11:00 ... 18, 2007. The presentation will be webcast live,and may ...
Cached Biology Technology:Warner Chilcott Announces New Information in USPTO Reexamination of Taclonex Patent 2Warner Chilcott Announces New Information in USPTO Reexamination of Taclonex Patent 3Diageo Sponsors Medical Society of the State of New York's Physicians Training Program 2Diageo Sponsors Medical Society of the State of New York's Physicians Training Program 3Luminex Corporation to Present at ThinkEquity Partners Investor Conference 2
BD Falcon 850 cm Smooth-surface TufRol Roller Bottle, tissue-culture treated polystyrene, blow-molded one-piece design, with easy on/off non-vented cap. (2/sp, 20/ca) Packaging: 2 / pack, 20 /...
... Display Vector is specifically designed to target ... of Saccharomyces cerevisiae. Displayed proteins can be ... known or putative ligands. pYD1 uses the ... two domains, Aga1 and Aga2, to display ...
... are used for heterologous protein expression in the ... S2 cell line was derived from a primary ... Drosophila melanogaster embryos (1). This versatile ... CO2 and is easily adapted to suspension culture. ...
ACS Reagent Grade C 19 H 14 O 5 S Formula Weight: 354.38 PRODUCT SPECIFICATIONS Form: Rust/red crystalline powder Clarity of Solution: Passes test Visual Transition Interval: pH 6.8 - Yellow pH 8.2...
Biology Products: