Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Plant studies reveal how, where seeds store iron

06.11.2006
Findings address worldwide iron deficiency and malnutrition

Biologists have learned where and how some plant seeds store iron, a valuable discovery for scientists working to improve the iron content of plants. Their research helps address the worldwide problem of iron deficiency and malnutrition in humans.

The team found that iron is stored in the developing vascular system of the seed of Arabidopsis, a model plant used in research. In particular, iron is stored in the vacuole, a plant cell's central storage site. The researchers also learned this localization depends on a protein called VIT1, known to transport iron into the vacuole.

"Iron deficiency is the most common human nutritional disorder in the world today, afflicting more than 3 billion people worldwide," said Mary Lou Guerinot, a biologist at Dartmouth College in N.H. and the principal investigator on the study. "Most of these people rely on plants for their dietary iron, but plants are not high in iron, and the limited availability of iron in the soil can limit plant growth. Our study suggests that iron storage in the vacuole is a promising, and, before now, largely unexplored target for increasing the iron content of seeds. Such nutrient-rich seeds would benefit both human health and agricultural productivity."

... more about:
»Seed »finding »stored »vacuole

The findings were published online in the Nov. 2, 2006, ScienceExpress, the advance publication site for the journal Science.

The researchers combined traditional mutant analysis (turning on and off the VIT1 protein) with a powerful X-ray imaging technique to create a map of where iron is localized in the seed. Guerinot was surprised by the finding because most studies on iron storage focus on another protein called ferritin.

"This project is a wonderful example of the power of using new combinations of tools--in this case, genetics and high-resolution 3-dimensional X-ray fluorescence imaging--to understand gene function," said Jane Silverthorne, a program director in NSF's Division of Biological Infrastructure, which funded the research. "The discovery that iron localizes in specific parts of a seed opens the possibility of developing seed crops such as grains and beans with increased content of this important nutrient."

The findings reveal how essential it is to look beyond ferritin to understand how iron is stored by plants. The researchers say the stored iron in the vacuole is a key source of iron for developing seedlings. Seedlings that do not express the VIT1 protein grow poorly when iron is limited.

In addition to funding from the National Science Foundation, the study was also supported by the National Institutes of Health. The imaging was carried out at the Department of Energy's National Synchrotron Light Source at Brookhaven National Laboratory.

Other authors of the paper include Sun A Kim and Tracy Punshon, both of Dartmouth, Antonio Lanzirotti of the University of Chicago, Liangtao Li and Jerry Kaplan of the University of Utah School of Medicine, José Alonso with North Carolina State University, and Joseph Ecker with the Salk Institute for Biological Studies.

Cheryl Dybas | EurekAlert!
Further information:
http://www.nsf.gov

Further reports about: Seed finding stored vacuole

More articles from Life Sciences:

nachricht Complementing conventional antibiotics
24.05.2018 | Goethe-Universität Frankfurt am Main

nachricht Building a brain, cell by cell: Researchers make a mini neuron network (of two)
23.05.2018 | Institute of Industrial Science, The University of Tokyo

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Could a particle accelerator using laser-driven implosion become a reality?

24.05.2018 | Physics and Astronomy

Hot cars can hit deadly temperatures in as little as one hour

24.05.2018 | Health and Medicine

Complementing conventional antibiotics

24.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>