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:2/5/2015)... , January 28, 2015 New ... Size And Segment Forecasts To 2020 has Been Added ... camera market is expected to reach USD 5.10 billion ... View Research, Inc. IR cameras help identify the site ... expected to witness surging demand in medical imaging applications. ...
(Date:2/5/2015)... 3, 2015 Despite a lack of ... such as consumer electronics, automotive, storage and telecommunication ... technology (SMT) screen printers. Innovations in electronics and ... push the adoption curve up. Meanwhile, sale volumes ... glue dispensers are indispensable in the production of ...
(Date:1/22/2015)... Jan. 13, 2015  Today, FreeWavz ( www.FreeWavz.com ), ... crowdfunding campaign on Fundable, https://www.fundable.com/freewavz . FreeWavz ... production capacity to meet customer demand. ... http://photos.prnewswire.com/prnh/20150113/168790 Invented by ...
Breaking Biology News(10 mins):IR Camera Market Worth $5.10 Billion By 2020: Grand View Research, Inc. 2IR Camera Market Worth $5.10 Billion By 2020: Grand View Research, Inc. 3End-user Demand Spurs Global SMT Screen Printers and Glue Dispensers Market 2End-user Demand Spurs Global SMT Screen Printers and Glue Dispensers Market 3FreeWavz Launches on Fundable to Drive Speed-to-Market in 2015 2
... DALLAS, April 3, 2012 /PRNewswire-iReach/ -- FirstMark today ... Regional Sales Manager for the Southeast region of the United ... primary role will be to drive growth and awareness for ... test that distinguishes the top 5 percent of suspected or ...
... EAST LANSING, Mich. For children with autism, being ... to increase the severity of their symptoms, according to ... autistic children who were born either preterm or post-term ... children born on time, revealed the study by Tammy ...
... Rodney Howell, MD, FACMG, is the recipient of the 2012 ... Dr. Howell is Professor of Pediatrics and Chairman Emeritus ... Miami. Dr. Howell, president of the American College of ... work in the field of pediatrics and genetic research and ...
Cached Biology News:FirstMark Announces New Hire Jay Houtman as Southeast Regional Sales Manager 2Autistic kids born preterm, post-term have more severe symptoms 2Renowned geneticist R. Rodney Howell receives ACMG Foundation Lifetime Achievement Award 2Renowned geneticist R. Rodney Howell receives ACMG Foundation Lifetime Achievement Award 3Renowned geneticist R. Rodney Howell receives ACMG Foundation Lifetime Achievement Award 4
(Date:3/6/2015)... , March 6, 2015 ... Repair Market by Product (Mesh/Tissue patch, Allograft, Xenograft, Suture ... Orthopedic, Skin, Dental, Vaginal, Breast augmentation) - Global Forecast ... Market is expected to reach $14.7 Billion in 2019 ... of 7.5% from 2014 to 2019. ...
(Date:3/6/2015)... N.Y. , March 6, 2015 BioSpecifics ... company developing first in class collagenase-based products marketed as ... the U.S. and XIAPEX ®  in the EU, announced ... live audio webcast at 8:30 a.m. ET on Friday, ... full year 2014 financial results and provide a corporate ...
(Date:3/6/2015)... Wash. , March 6, 2015   BioLife ... leading developer, manufacturer and marketer of proprietary clinical grade ... media and precision thermal shipping products for ... the Company,s fourth quarter and full year 2014 financial results ... that the Company will host a conference call and ...
(Date:3/5/2015)... , March 5, 2015   HX360 ... semi-finalists in the HX360 Innovation Challenge competition. ... will compete to be chosen as one of four ... of senior health system executives and venture capitalists during ... Innovation Challenge takes place at the 2015 HIMSS Annual ...
Breaking Biology Technology:Soft Tissue Repair Market worth $14.7 Billion in 2019 2Soft Tissue Repair Market worth $14.7 Billion in 2019 3Soft Tissue Repair Market worth $14.7 Billion in 2019 4BioSpecifics Technologies Corp. to Host Conference Call to Report Fourth Quarter and Full Year 2014 Financial Results on Friday, March 13, 2015 2BioLife Solutions to Report Fourth Quarter and Full Year 2014 Financial Results and Provide Business Update on March 12, 2015 2HX360 Announces Sixteen Innovation Challenge Semi-finalists Competing To Deliver Solutions That Improve The Patient Experience 2HX360 Announces Sixteen Innovation Challenge Semi-finalists Competing To Deliver Solutions That Improve The Patient Experience 3HX360 Announces Sixteen Innovation Challenge Semi-finalists Competing To Deliver Solutions That Improve The Patient Experience 4
... Bedside Detection of Ischemic ... Infarction (Heart Attack), TEL AVIV, Israel, February 26 ... develops and markets systems for,non-invasive diagnosis and monitoring of ... using its proprietary,HyperQ technology in resting conditions., The ...
... today announced the,appointment of Douglas W. Axelrod, M.D., ... Development., Axelrod joins Ambrx after a productive ... Pharmaceuticals. Most recently, he served as,Vice President of ... he accelerated the discovery process, improved the,discovery to ...
... to join the Company, NATICK, Mass., Feb. 26 ... that Jay J. Schnitzer, M.D., Ph.D.,will be joining the ... will serve as Vice President and Associate Chief Medical,Officer, ... the Chief,Medical and Scientific Officer, Dr. Donald S. Baim, ...
Cached Biology Technology:BSP's New Line of HyperQ Products: Bedside Ischemia Monitoring Systems Announces Successful Results of First Feasibility Study 2Ambrx Appoints Douglas Axelrod Senior Vice President for Clinical Research and Development 2Boston Scientific Announces Addition to Clinical Sciences Organization 2Boston Scientific Announces Addition to Clinical Sciences Organization 3Boston Scientific Announces Addition to Clinical Sciences Organization 4
... & visualization software. See ... samples. Combine Sequest and ... confidence. Get more detailed ... your MS/MS experiments.14 day ...
... Clone/PAD: ZMD.467. Immunogen: Synthetic peptide ... the human rat mouse dog and ... for the human occludin protein. ... lysates). Reactivity with rat mouse ...
Anti-ZFP-38/RU49 Family: Zinc Finger Peptide Sequence: SVKVEDKDFPSTCSKK...
Antibodies were affinity purified using epitopes specific to UBAP2L/NICE4 immobilized on solid support....
Biology Products: