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:12/17/2014)... 16, 2014 Research and Markets ... the "Global Chemical Sensor Market 2015-2019" ... http://photos.prnewswire.com/prnh/20130307/600769 One major trend ... for medical sensors in biomedical applications. Chemical sensors ... and correct diagnosis during surgical procedures. The Global ...
(Date:12/11/2014)... 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/9ql3kr/biometrics_market ) has announced the addition of ... report to their offering. One ... adoption of multimodal biometric systems. Multimodal biometric systems ... for verification and identification purposes. This helps to ...
(Date:12/10/2014)... Dec. 9, 2014  Valencell, a leader in performance ... a staggering demand from its licensees for highly accurate, ... is not solely coming from fitness and health sectors, ... "A wearable is only as useful as the ... the ultimate driver in long-term mass consumer adoption of ...
Breaking Biology News(10 mins):Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2Wearable Technology Products Demand Highly Accurate Biometric Technology 2
... Harbor, NY -- One of the most tantalizing developments in ... targeted treatments, which have proven highly effective in holding aggressive ... a limited period of time. A team led by ... Laboratory (CSHL), today published results of a study that suggests ...
... be complicated at the best of times, but plants have an ... pollinate your flowers and reproduce, you will want your flowerstalks to ... above the crowd. But if your stalk is too long, you,ll ... someone,s lunch. It used to be thought that carnivorous plants like ...
... save one of the world,s rarest amphibians from extinction, one ... after being painstakingly reared at the Bronx Zoo and The ... and the World Bank. The toads now reside at ... Tanzania,s commercial capital, with the eventual goal of reintroducing the ...
Cached Biology News:New mechanisms of tumor resistance to targeted therapy in lung cancer are discovered 2Sundews just want to be loved 2Kihansi spray toads make historic return to Tanzania 2Kihansi spray toads make historic return to Tanzania 3
(Date:12/22/2014)... Dec. 22, 2014 /PRNewswire/ - RepliCel Life Sciences Inc. ... company focused on the development of autologous cell therapies, ... the University of Calgary in conjunction with co-authors from ... further validates the company,s ongoing clinical research using dermal ... pattern baldness. The paper entitled " Hair ...
(Date:12/22/2014)... VIEJO, Calif. , Dec. 22, 2014  ( ... that CoPatient, an online medical bill review and advocacy ... offering in the FREE WellCard Savings discount health services ... medical bill that was more than they expected to ... members reduce health care costs, WellCard Savings is pleased ...
(Date:12/22/2014)... Fertility Associates of Memphis has announced ... , a network of more than 20 contributing ... have fast access to a national pool of frozen ... Fertility Associates of Memphis is the only fertility clinic ... , Dr. William Kutteh , director of Fertility ...
(Date:12/19/2014)... 2014 BioPlus Specialty Pharmacy ... the promotion of Nick Maroulis, Pharm.D. to the newly ... , In this position, Dr. Maroulis will continue ... the directors of our multi-site pharmacies as the company ... and during that time he has served in many ...
Breaking Biology Technology:Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 2Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 4Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 5WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2
... March 12 Maryland biotech CEOs and companies were honored ... region,s fourth bioscience award competition. , , Winners ... , Best ... CEO, Osiris Therapeutics, Inc. Mills, Columbia-based company has ...
... ERT, a leading provider of centralized ECG and ... medical device, and related industries, announced today that it ... on Booth #1253/1254 at the 21st Annual DIA Euromeeting, ... inviting attendees to three speaking sessions, which will discuss ...
... Arkion(R) Life Sciences has received their first ever Section ... in Louisiana and Missouri effective March 6, 2009, through ... rice growers in these states can protect their seed ... repellent effectively stops birds from eating the newly planted ...
Cached Biology Technology:Three Firms, Two Training Programs Garner Greater Baltimore Committee's 2009 Bioscience Awards 2ERT to Showcase Its Clinical Trials Portfolio at DIA's 21st Euromeeting 2ERT to Showcase Its Clinical Trials Portfolio at DIA's 21st Euromeeting 3AV-1011 Bird Repellent to Protect Rice Seed Approved for Use in Louisiana and Missouri 2
... Rabbit polyclonal to Taura Syndrome ... for all tested applications). ... Synthetic peptide: VTNSEGSTIL MNDIPITNQN VVLSKNVTDN ... corresponding to N terminal amino ...
Anti-rat Dipeptidyl Peptidase IV (DPP IV), CD26, Clone 5E8, Monoclonal Antibody...
Purified Mouse anti-Hu Actopaxin (pS8) Storage Temperature: Refrigerate(2 to 8C)...
... Anti-acetyl-Histone H3 (Lys 4) ... the sequence ...RT[ Ac K]Q... in which ... 4 of human histone H3 ... Molecular Weight: Mr ~17kDa ...
Biology Products: