Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Flood-tolerant rice plants can also survive drought, say UC Riverside scientists

03.03.2011
Research could greatly benefit rice farmers and consumers worldwide

Rice, which is sensitive to drought due to its high water requirement, is particularly vulnerable to how global climate change is altering the frequency and magnitude of floods and droughts. If rice plants' combined tolerance to flooding and drought could be improved, however, rice productivity could be protected and even substantially increased.

Now plant scientists at the University of California, Riverside have made a discovery that can greatly benefit rice growers and consumers everywhere. The researchers have demonstrated in the lab and greenhouse that rice that is flood tolerant is also better able to recover from a drought.

"Flood tolerance does not reduce drought tolerance in these rice plants, and appears to even benefit them when they encounter drought," said Julia Bailey-Serres, a professor of genetics in the Department of Botany and Plant Sciences, who led the research project.

Bailey-Serres and her team – Takeshi Fukao, a senior researcher, and Elaine Yeung, an undergraduate student – focused on Sub1A, a gene responsible for flood or "submergence" tolerance in rice and found only in some low-yielding rice varieties in India and Sri Lanka. Sub1A works by making the plant dormant during submergence, allowing it to conserve energy until the floodwaters recede. Rice with the Sub1A gene can survive more than two weeks of complete submergence.

Plant breeders have already benefited farmers worldwide – especially in South Asia – by having transferred Sub1A into high-yielding rice varieties without compromising these varieties' desirable traits—such as high yield, good grain quality, and pest and disease resistance.

Bailey-Serres's lab found that in addition to providing robust submergence tolerance, Sub1A aids survival of drought. The researchers report that at the molecular level Sub1A serves as a convergence point between submergence and drought response pathways, allowing rice plants to survive and re-grow after both extremes of precipitation.

Study results appear in the January issue of The Plant Cell. The journal has the highest impact factor of primary research journals in plant biology. The research paper also has been selected as a recommended read in the Faculty of 1000.

Bailey-Serres's lab investigated the drought tolerance of flood-tolerant rice plants because her research team wanted to be sure that the flood tolerance trait, which the lab has studied for many years, did not reduce the ability of the plant to endure some of the other common stresses – such as drought.

"We found that Sub1A properly coordinates physiological and molecular responses to cellular water deficit when this deficit occurs independently, as in a time of drought, or following 'desubmergence,' which takes place when flood waters recede," Bailey-Serres said.

She explained that after a flood, a period follows when the leaves that have been submerged lose water and become dehydrated. Moreover, because a period of dehydration is part of the natural progression of a flood, Sub1A also happens to have benefits after desubmergence and is therefore important for drought tolerance as well.

"Our finding suggests that the plant recovers well from drought by growing new shoots," Bailey-Serres said. "This is something that is also seen with flooding."

Next, colleagues of Bailey-Serres at the International Rice Research Institute in the Philippines will test the Sub1A rice for drought tolerance in the field.

The research was supported by a grant from the U.S. Department of Agriculture (USDA) Cooperative State Research, Education, and Extension Service to Bailey-Serres, who is the lead recipient of the 2008 USDA National Research Initiative Discovery Award. Fukao is the first author of the research paper.

The University of California, Riverside (www.ucr.edu) is a doctoral research university, a living laboratory for groundbreaking exploration of issues critical to Inland Southern California, the state and communities around the world. Reflecting California's diverse culture, UCR's enrollment has exceeded 20,500 students. The campus will open a medical school in 2012 and has reached the heart of the Coachella Valley by way of the UCR Palm Desert Graduate Center. The campus has an annual statewide economic impact of more than $1 billion.

A broadcast studio with fiber cable to the AT&T Hollywood hub is available for live or taped interviews. To learn more, call (951) UCR-NEWS.

Iqbal Pittalwala | EurekAlert!
Further information:
http://www.ucr.edu

More articles from Agricultural and Forestry Science:

nachricht New gene for atrazine resistance identified in waterhemp
24.02.2017 | University of Illinois College of Agricultural, Consumer and Environmental Sciences

nachricht Researchers discover a new link to fight billion-dollar threat to soybean production
14.02.2017 | University of Missouri-Columbia

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: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>