Navigation Links
How soft corals defy their environment
Date:8/16/2011

Calcium carbonate is a salt for all seasons. It turns up not only in marble, but also in biogenic sediments such as limestone and coral reefs and even in pearls. The compound exists in two major crystalline forms, as calcite or aragonite. However, it is not clear what determines which variant an organism will exploit under conditions in which both forms can precipitate. A team of researchers led by LMU geobiologist Dr. Azizur Rahman, who is also a Research Fellow of the Alexander von Humboldt Foundation, has now answered this question, in collaboration with colleagues based at the University of the Ryukyu Islands in Japan. Together, the scientists have shown that, in the soft coral species Lobophytum crissum, a secreted, extracellular protein known as ECMP-67 is the decisive factor that results in the precipitation of calcite, irrespective of the chemical conditions prevailing in the surrounding seawater. "Over the course of Earth's history, and most probably depending on the relative amounts of dissolved magnesium and calcium ions, either calcite or aragonite has dominated in the world's oceans," says Professor Gert Wrheide, one of the authors of the new study. Current conditions favor the formation of aragonite, and many stony corals build their skeletons exclusively from this material. However, thanks to ECMP-67, Lobophytum crassum can still produce calcite in an aragonite sea. "We have also been able to show how the extracellular protein ECMP-67 contributes to the production of calcite at the molecular level," says Rahman. "These findings should also allow us to elucidate the crystal structure of calcite in natural environments." The study was funded by the Alexander von Humboldt Foundation and the Japanese Society for the Promotion of Sciences.


'/>"/>

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

Page: 1

Related biology news :

1. Rare corals breed their way out of trouble
2. Cold water corals conference to be held in Woods Hole
3. 4 years after tsunami: Corals stage comeback
4. Global sunscreen wont save corals
5. Help for climate-stressed corals
6. Corals stay close to home
7. Nursery programs for corals receive TLC from NOAA this Independence Day
8. Ancient corals hold new hope for reefs
9. New study sheds light on corals susceptibility to temperature change
10. Not a fish story: Protected corals increase fishing profits
11. Baby corals dance their way home
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2016)... PUNE, India , March 22, 2016 ... new market research report "Electronic Sensors Market for ... Fingerprint, Proximity, & Others), Application (Communication & ... and Geography - Global Forecast to 2022", ... consumer industry is expected to reach USD ...
(Date:3/21/2016)... , March 22, 2016 ... recognition with passcodes for superior security   ... a leading provider of secure digital communications services, today ... biometric technology and offer enterprise customers, particularly those in ... facial recognition and voice authentication within a mobile app, ...
(Date:3/17/2016)... -- ABI Research, the leader in transformative technology ... will reach more than $30 billion by 2021, ... electronics, particularly smartphones, continue to boost the biometrics ... two billion shipments by 2021 at a 40% ... Analyst at ABI Research. "Surveillance is also gearing ...
Breaking Biology News(10 mins):
(Date:4/27/2016)... (PRWEB) , ... April 27, 2016 , ... ... of cannabis testing technology at the Spring 2016 Marijuana Business Conference and Expo. ... pesticides, residual solvents, heavy metals, and more. Expo attendees can stop by booth ...
(Date:4/27/2016)... ... April 27, 2016 , ... Most consumers engage ... fingerprint recognition for secure access, voice recognition for hands-free communication, and facial recognition ... interacting with biometrics technology today. But if they asked Joey Pritikin, Vice ...
(Date:4/27/2016)... and RESEARCH TRIANGLE PARK, N.C. ... (NASDAQ: UTHR ) announced today that ... of United Therapeutics will provide an overview and update ... st Annual Health Care Conference. The ... at 10:00 a.m. Eastern Time, and can be accessed ...
(Date:4/27/2016)... ... 2016 , ... NDA Partners Chairman Carl Peck, MD ... Consultant. Mr. Clark was formerly a Vice President with US Pharmacopeia, where ... monographs based on analytical methods. NDA Partners Expert Consultants are top tier ...
Breaking Biology Technology: