Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers examine bacterial rice diseases, search for genetic solutions

03.04.2009
As a major food source for much of the world, rice is one of the most important plants on earth.

Keeping it safe from disease has become, in part, the task of a group of three researchers from Iowa State University and one from Kansas State University.

The researchers are looking at two bacterial diseases of rice. The most costly is bacterial blight of rice, which is caused by a bacterium called Xanthomonas oryzae pathovar oryzae, and can diminish yield by up to 50 percent.

"This is the most important bacterial disease in rice, and in some areas, it is the most important rice disease of any kind," said Adam Bogdanove, an associate professor of plant pathology who is part of the ISU research team.

The team is also studying bacterial leaf streak of rice caused by the closely related bacterium Xanthomonas oryzae pathovar oryzicola. Bacterial leaf streak is usually not as damaging as bacterial blight, but it is increasing in importance in many areas of the world, particularly Southeast Asia.

These bacteria damage rice by entering the plant and taking control of certain rice cell processes, eventually killing the rice cells. Pathovar oryzae does this in the vascular system of the plant, which typically allows the bacterium to spread faster and cause more damage than is its cousin, oryzicola, which is limited to growth in the tissue between the veins.

Some types of rice are naturally resistant to the Xanthomonas bacteria. Bogdanove and other researchers -- Bing Yang, Iowa State assistant professor of genetics development and cell biology; Dan Nettleton, Iowa State professor of statistics; and Frank White, principal investigator and professor of plant pathology at Kansas State University, Manhattan -- are researching why some types of rice are naturally resistant to the bacteria.

In rice varieties that are resistant to the diseases, the team is exposing the plants to the two bacteria. They then check to see which plant genes are activated, and to what extent.

By identifying which genes are turned on, Bogdanove believes the team can identify the genes that are making the plants resistant.

"We are looking at genes of successful plants," he said. "What genes are active and when and how much they are being turned on."

Bogdanove hopes that this effort will aid in breeding the resistance into cultivated varieties that are currently susceptible to the diseases.

Another aspect of the research is aimed at discovering how the bacteria change gene expression in susceptible rice plants.

"If we understand which genes are being manipulated by the pathogens in disease, we can look into different varieties and wild relatives of rice for variants of these genes that are immune to manipulation and bring these genes into cultivated varieties," said Bogdanove. "The idea is to reduce or eliminate susceptibility altogether."

Rice is the major food staple for more than half the world's population. In the United States, rice is planted on almost 3 million acres with yields of around 7,000 pounds per acre in 2007, according the U.S. Department of Agriculture.

American producers grow 95 percent of the rice eaten in this country and the United States is a major exporter as well, according to Bogdanove.

In addition to the benefits to rice, the research should be helpful in understanding and controlling diseases in other cereal crops.

"Rice is a model plant for cereal biology," said Bogdanove.

Funding for the project comes from the National Science Foundation through Kansas State University, the lead institution on the project. Of the $3 million award for the project, $2 million is going to Iowa State.

Adam Bogdanove | EurekAlert!
Further information:
http://www.iastate.edu

More articles from Agricultural and Forestry Science:

nachricht Raiding the rape field
23.05.2018 | Julius-Maximilians-Universität Würzburg

nachricht New technique reveals details of forest fire recovery
17.05.2018 | DOE/Brookhaven National Laboratory

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

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

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...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

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

Research reveals how order first appears in liquid crystals

23.05.2018 | Life Sciences

Space-like gravity weakens biochemical signals in muscle formation

23.05.2018 | Life Sciences

NIST puts the optical microscope under the microscope to achieve atomic accuracy

23.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>