News / Asia

In Philippines, Crop Researchers Try to Flood-proof Rice

FILE - A rice farmer sows seeds in Oton, Iloilo, Philippines.
FILE - A rice farmer sows seeds in Oton, Iloilo, Philippines.
Simone Orendain
— Crop scientists from around the world are in the Philippines this week at the International Rice Research Institute, exchanging ideas on how flooded rice and other staple crops could stay alive for long periods. 
                                            
Scientists at the International Rice Research Institute have already found a way for several varieties of rice to live after being totally submerged for more than 10 days: certain kinds of rice can be crossbred with a gene called SUB1, which stops the rice from growing while it is underwater, thus preserving itself. About five years ago, farmers in the Philippines, Indonesia and several South Asian countries started growing these varieties.
 
Despite that success, IRRI Principal Scientist Abdelbagi Ismail says close to 25 million hectares of rice is lost to flooding every year in Asia and Africa alone.  There are about 150 million hectares of rice worldwide.
 
With one seventh of the total crop lost, Ismail says researchers want to find a way to make flooded rice survive even longer, so they are now looking more closely at the work of researchers who study how plants survive without oxygen.
 
 “Now SUB1 can protect up to two weeks, but sometimes we get floods up to 25 days.  So we lose it even with SUB1.  So we want to see if we can increase flooding tolerance by more than one week- additional to SUB1.  Any information that comes from these studies could help us,” explained Ismail.
 
Ismail also pointed out that IRRI, whose work is heavily focused on how rice adapts to flooding, is currently concentrating on three areas.  Scientists want to help inundated rice sprouts continue to grow normally, discover other genes that can perform the same function as SUB1, and breed varieties that can withstand total and partial submersion. This last goal will be particularly helpful for many rice-growing areas, as during the rainy season flooded soil will oftentimes never completely drain.
 
Researchers are still working to understand how plants are able to sense low oxygen levels, which sends them into survival mode.
 
Scientist Laurentius Voesenek, of the Netherlands’ Utrecht University, researches wild plants that live in partial submersion or flood-prone river areas, focusing on fundamental traits that help plants cope with flooding.  Voesenek’s work is on ethylene, a gas emitted by plants once they become submerged.
 
“Gases produced by the plant can only very slowly escape.  So if production continues it builds up and that is a very reliable signal for the plant to know ‘I’m under water.  I’m in trouble.  I have to do something.  Switch on genes which might protect,’” explains Voesenek.
 
Scientists are also sharing work on crops that can be grown despite stagnant flooding. Ismail says this work is important, and will help discover how farmers can use the wet soil of flooded rice fields for other staples such as maize, wheat and barley.

You May Like

Lebanese Media Unite to Support Palestinians in Gaza

Joint newscast billed as Arab world’s first unified news bulletin in support of Hamas-controlled Gaza Strip More

Photogallery Australian PM Alleges ‘Coverup’ at MH17 Crash Site

Meanwhile, Russia's ambassador to Malaysia denies plane's black boxes were opened before they were handed over to Malaysian officials More

Despite Advances in AIDS Treatment, Stigma Lingers

Leading immunologist tells VOA that stigma is often what prevents those infected with disease from seeking treatment More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
IAEA: Iran Turns its Enriched Uranium Into Less Harmful Formi
X
July 22, 2014 10:26 AM
Iran has converted its stockpiles of enriched uranium into a less dangerous form that is more difficult to use for nuclear weapons, according to the United Nations’ Atomic Energy Agency. The move complies with an interim deal reached with Western powers on Iran's nuclear program last year, in exchange for easing of sanctions. Henry Ridgwell reports for VOA from London.
Video

Video IAEA: Iran Turns its Enriched Uranium Into Less Harmful Form

Iran has converted its stockpiles of enriched uranium into a less dangerous form that is more difficult to use for nuclear weapons, according to the United Nations’ Atomic Energy Agency. The move complies with an interim deal reached with Western powers on Iran's nuclear program last year, in exchange for easing of sanctions. Henry Ridgwell reports for VOA from London.
Video

Video Relic of Saint Draws Catholics Worried About Immigration Issue

A Roman Catholic saint who is a figure of devotion for those crossing the border into the United States is attracting believers concerned about the plight of undocumented immigrants. Mike O'Sullivan reports from Los Angeles, where a relic of Saint Toribio has drawn thousands to local churches.
Video

Video Ukraine Rebels Surrender MH17 Black Boxes

After days of negotiations, a senior separatist leader handed over two black boxes from an airliner downed over eastern Ukraine to Malaysian experts early Tuesday. While on Monday, the U.N. Security Council unanimously demanded that armed groups controlling the crash site allow safe and unrestricted access to the wreckage.
Video

Video In Cambodia, HIV Diagnosis Brings Deadly Shame

Although HIV/AIDS is now a treatable condition, a positive diagnosis is still a life altering experience. In Cambodia, people living with HIV are often disowned by friends, family and the community. This humiliation can be unbearable. We bring you one Cambodian woman’s struggle to overcome a life tragedy and her own HIV positive diagnosis.
Video

Video Nature of Space Exploration Enters New Age

Forty-five years ago this month, the first humans walked on the moon. It was during an era of the space race between the United States and the Soviet Union. World politics have changed since then and -- as Elizabeth Lee reports -- so has the nature of space exploration.
Video

Video Chicago’s Argonne Lab Developing Battery of the Future

In 2012, the U.S. Department of Energy’s Office of Science awarded a $120 million grant to a new technology center focused on battery development - headquartered at Argonne National Laboratory in suburban Chicago, Illinois. As VOA’s Kane Farabaugh reports, there scientists are making the next technological breakthroughs in energy storage.
Video

Video In NW Pakistan, Army Offensive Causes Massive Number of Displaced

Pakistan’s army offensive in North Waziristan has resulted in the large-scale displacement of the local population. VOA's Ayaz Gul reports from northwest Pakistan where authorities say around 80 percent of the estimated 1 million internally displaced persons [IDPs] have settled in Bannu district, while much of the remaining 20 percent are scattered in nearby cities.
Video

Video Kurdish Peshmerga Force Secures Kirkuk, Its Oil

The Kurdistan regional government has sent its Peshmerga troops into the adjacent province of Kirkuk to drive out insurgents, and to secure the area's rich oil fields. By doing this, the regional government has added a fourth province to the three it officially controls. The oil also provides revenue that could make an independent Kurdistan economically strong. VOA’s Jeffrey Young went out with the Peshmerga and filed this report.
Video

Video Malaysia Reeling: Second Air Disaster in Four Months

Malaysia is reeling from the second air disaster in four months involving the country’s flag carrier. Flight 340 vanished in March and despite an extensive search, no debris has been found. And on Thursday, Flight 17, likely hit by a surface-to-air missile, came apart over eastern Ukraine. The two incidents together have left more than 500 people dead. VOA Correspondent Steve Herman reports from Kuala Lumpur.

AppleAndroid