Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A blue stoplight to prevent runaway photosynthesis

27.09.2016

An international team including researchers in France and Japan, using the green alga Chlamydomonas as a model, found a switch that triggers the suppression mechanism to prevent runaway photosynthesis. The switch is a blue light photoreceptor protein called phototropin. The research has been published in the September 22 issue of Nature.

Through photosynthesis, solar energy is converted into biological energy. It is often thought that photosynthesis becomes stronger as light becomes stronger, but actually photosynthesis may run out of control if subjected to an overabundance of light, causing reactive oxygen species which break the photosynthetic apparatus. To avoid this, when exposed to intense light plants have a mechanism called "qE quenching" to prevent runaway photosynthesis by converting the excess energy to heat and discarding it. An international team including researchers in France and Japan, using the green alga Chlamydomonas as a model, found a switch that triggers the suppression mechanism to prevent runaway photosynthesis. The switch is a blue light photoreceptor protein called phototropin. The research has been published in the September 22 issue of Nature.


Okazaki Large Spectrograph in Japan, where the action spectra of qE quenching were recorded.

Copyright : NIBB

Professor Jun Minagawa of the National Institute for Basic Biology in Japan said "Too much direct sunlight is a painful thing for humans, and it is painful even for plants. Being in an environment where direct sunlight pours down all year round is a big burden for plants. We now know that within plants information regarding the active state of photosynthesis, combined with the sensing of blue light, fit together to activate the photosynthesis suppressing ‘qE quenching’ system.” Drs. Dimitris Petroutsos and Giovanni Finazzi of the French National Center for Scientific Research (CNRS) have said "We looked at what have so far been considered to be completely separate phenomena, the perception of blue light by phototropin, photosynthesis by chlorophyll, and light protection by qE quenching, and to find that these three systems are connected at the molecular level has made us very happy."

This blue stoplight photosynthesis inhibiting system is believed to be shared among algae, moss, and other plants. It is expected to be useful in the optimization of applications such as biofuel production.


Journal Information
“A blue-light photoreceptor mediates the feedback regulation of photosynthesis”
Dimitris Petroutsos, Ryutaro Tokutsu, Shinichiro Maruyama, Serena Flori, Andre Greiner, Leonardo Magneschi, Loic Cusant, Tilman Kottke, Maria Mittag, Peter Hegemann, Giovanni Finazzi & Jun Minagawa

Nature (2016) doi:10.1038/nature19358
http://dx.doi.org/10.1038/nature19358

Published online 14 September 2016, and printed on September 22 issue of Nature.

Associated links

Associated files available for download

View/download the file 'pr_NIBB_minagawa.pdf.

Journal information

Nature

Tomoko Kurata | Research SEA
Further information:
http://www.researchsea.com

More articles from Life Sciences:

nachricht Fish recognize their prey by electric colors
13.11.2018 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht The dawn of a new era for genebanks - molecular characterisation of an entire genebank collection
13.11.2018 | Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: A Chip with Blood Vessels

Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.

Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

Im Focus: Penn engineers develop ultrathin, ultralight 'nanocardboard'

When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure

Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...

Im Focus: Coping with errors in the quantum age

Physicists at ETH Zurich demonstrate how errors that occur during the manipulation of quantum system can be monitored and corrected on the fly

The field of quantum computation has seen tremendous progress in recent years. Bit by bit, quantum devices start to challenge conventional computers, at least...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

European Space Talks: Weltraumschrott – eine Gefahr für die Gesellschaft?

23.10.2018 | Event News

 
Latest News

The dawn of a new era for genebanks - molecular characterisation of an entire genebank collection

13.11.2018 | Life Sciences

Fish recognize their prey by electric colors

13.11.2018 | Life Sciences

Ultrasound Connects

13.11.2018 | Awards Funding

VideoLinks
Science & Research
Overview of more VideoLinks >>>