Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

In between red and blue light: Researchers discover new functionality of molecular light switches

20.10.2014

Diatoms play an important role in water quality and in the global climate. They generate about one fourth of the oxygen in the Earth’s atmosphere and perform around one-quarter of the global CO2 assimilation, i.e. they convert carbon dioxide into organic substances. Their light receptors are a crucial factor in this process.

Researchers at Leipzig University and the Helmholtz Centre for Environmental Research have now discovered that blue and red light sensing photoreceptors control the carbon flow in these algae. These results have been recently published by the scientists in the well-known online trade journal, PLOS ONE.


Microscopical picture of a diatom.

Photo: Leipzig University, Christian Wilhelm

“Diatoms display a special way of reacting to light and adapting their metabolism to the changing light conditions in the water", says Prof. Dr. Christian Wilhelm, Head of the Plant Physiology Department at Leipzig University.

“For the first time, we have been able to show that the light receptors, which measure the intensity of the blue or red light, not only change the genetic transcription, but also directly control the activity of enzymes in the metabolism."

A rapid light change from blue light to red light and vice versa does not influence the photosynthesis output, but the metabolism is drastically reversed within 15 minutes. “This way, cells that have grown in red light, which continue to be cultivated in a blue light environment can still perform photosynthesis, but can no longer grow.”

These “light switches” can be used to control the carbon flow in cells. The evidence for this was provided using the MetaPro metabolomic platform established at the Helmholtz Centre for Environmental Research. “This opens up new ways for the biotechnological control of cells”, explains Christian Wilhelm.

“This work is further evidence of the added-value of intensive cooperations between non-university and university institutions, particularly with the Faculty of Biosciences, Pharmacy and Psychology”, Prof. Martin von Bergen, Spokesman of the Department of Metabolomics at the UFZ and one of the co-authors, is pleased to say.

The Leipzig-based algae experts in plant physiology at Leipzig University already drew attention to itself two years ago with another publication: Together with scientists from Karlsruhe and Bremen, they provided evidence that sunlight can be converted into pure natural gas in a highly efficient manner with the aid of microorganisms. In doing so, the metabolism of green algae is reversed.

The publication about the diatoms:
The Acclimation of Phaeodactylum tricornutum to Blue and Red Light Does Not Influence the Photosynthetic Light Reaction but Strongly Disturbs the Carbon Allocation Pattern
DOI: 10.1371/journal.pone.0099727

The publication about the green algae:
Methane production from glycolate excreting algae as a new concept in the production of biofuels
DOI: 10.1016/j.biortech.2012.06.120

Contacts:
Prof. Dr. Christian Wilhelm
Institut for Biology, Plant Physiology
Tel: 0341-97-36874
E-mail: cwilhelm@rz.uni-leipzig.de
Internet: http://www.uni-leipzig.de/~pflaphys/

Prof. Dr. Martin von Bergen, Dr. Sven Baumann
Department of Metabolomics at the Helmholtz Centre for Environmental Research
Tel.: 0341-235-1211, -1099
E-mail: martin.vonbergen@ufz.de
E-mail: sven.baumann@ufz.de
Internet: http://www.ufz.de/index.php?de=17634
Internet: http://www.ufz.de/index.php?de=18274

Weitere Informationen:

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0099727 The publication about the diatoms
http://www.sciencedirect.com/science/article/pii/S0960852412010395 The publication about the green algae

Carsten Heckmann | Universität Leipzig

More articles from Life Sciences:

nachricht Cryo-electron microscopy achieves unprecedented resolution using new computational methods
24.03.2017 | DOE/Lawrence Berkeley National Laboratory

nachricht How cheetahs stay fit and healthy
24.03.2017 | Forschungsverbund Berlin e.V.

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>