Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Dartmouth researchers identify an important gene for a healthy, nutritious plant

01.08.2008
Dartmouth biologists have found a gene required for both efficient photosynthesis and for iron metabolism, processes necessary for producing a healthy plant and a nutritious food source. This research is part of a larger effort to learn how plants take up essential nutrients from the environment as they grow.

Lead researcher Mary Lou Guerinot, Professor of Biological Sciences, with co-author graduate student Jeeyon Jeong (photo by Joseph Mehling '69)

The research paper, published with colleagues from Colorado State University and the University of South Carolina, appeared in the early online edition of the Proceedings of the National Academy of Science during the week of July 21.

"There's a lot of attention today on global food shortages," says Mary Lou Guerinot, the principal investigator on the study and one of the authors of the paper. "We've found a gene that is key for proper chloroplast function. This finding might some day help scientists develop plants that grow better and can serve as more nutritious food."

... more about:
»Chloroplast »Guerinot »nutritious

During photosynthesis, chloroplasts are the subcellular compartment used by plant cells to convert light energy to sugars, fueling the plant. This process in the chloroplasts requires iron, and up to 90 percent of the iron in leaf cells is located in chloroplasts. In this study, Guerinot and her colleagues provide molecular evidence that FRO7, a gene in the FRO family, is involved in chloroplast iron acquisition and is required for efficient photosynthesis. The FRO family is a group of proteins that transfers electrons from ferric iron (Fe3+) to reduce it to another kind of iron (Fe2+). This same lab showed that this process (reduction of iron) was essential for plants to take up iron into the roots from the soil in a study published in 1999 in Nature.

"We have now shown that an analogous process is required for proper chloroplast function," says Guerinot. "Moreover, without FRO7, plants sown in iron deficient soil died as young seedlings. Our findings are of particular interest because how iron gets into chloroplasts has not been well understood despite the significance of iron in chloroplasts."

Guerinot explains that one-third of the soil worldwide is iron deficient, so it is important to understand how plants acquire iron, allocate iron to different parts of the plant and within the cell, and survive under iron limiting conditions. This is not only critical to improve plant growth and crop yields but also to improve human nutrition. According to the World Health Organization, iron deficiency is the most prevalent nutritional disorder in the world today and most people get their iron from eating plants.

"Enriching crops with mineral and vitamin nutrients will provide sustainable solutions to malnutrition," she says.

The work was funded by the National Science Foundation. The title of the paper is, "Chloroplast Fe(III) chelate reductase activity is essential for seedling viability under iron limiting conditions." Co-authors on this paper include Dartmouth graduate student Jeeyon Jeong, with Erin Connolly and Loubna Kerkeb at the University of South Carolina, and Marinus Pilon and Chris Cohu at Colorado State University.

Sue Knapp | EurekAlert!
Further information:
http://www.dartmouth.edu

Further reports about: Chloroplast Guerinot nutritious

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 >>>