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

US Investors Eye IPO for China's Alibaba

E-commerce giant handled 80 percent of China's online business last year, logging more Internet transactions than US-based Amazon.com and eBay combined More

Video Uneasy Calm Settles Over Israel, Gaza Strip

As cease-fire begins, Palestinians celebrate in streets; Israelis remain wary More

Video Chinese Doctors Use 3-D Spinal Implant

In treatment of a 12-year-old boy Chinese doctors used a 3-D printer and special software to create an exact replica of vertebra More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Chinese Doctors Use 3-D Spinal Implanti
X
August 27, 2014 4:53 PM
A Chinese boy suffering from a debilitating bone disease has become the first patient with a part of his spine created in a three-dimensional printer. Doctors say he will soon regain normal mobility. VOA’s George Putic reports.
Video

Video Chinese Doctors Use 3-D Spinal Implant

A Chinese boy suffering from a debilitating bone disease has become the first patient with a part of his spine created in a three-dimensional printer. Doctors say he will soon regain normal mobility. VOA’s George Putic reports.
Video

Video Uneasy Calm Settles Over Israel, Gaza Strip

Israel and the Gaza Strip have been calm since a cease-fire set in Tuesday evening, ending seven weeks of hostilities. Hamas, which controls Gaza, declared victory. Israelis were more wart. VOA’s Scott Bobb reports from Jerusalem.
Video

Video India’s Leprosy Battle Stymied by Continuing Stigma

Medical advancements in the treatment of leprosy have greatly diminished its impact around the world, largely eliminating the disease from most countries. India made great strides in combating leprosy, but still accounts for a majority of the world’s new cases each year, and the number of newly infected Indians is rising - more than 130,000 recorded last year. Doctors there say the problem has more to do with society than science. VOA News reports from Kolkata.
Video

Video Northern California Quake: No Way to Know When Next One Will Hit

A magnitude 6.0 earthquake rocked northern California’s Napa Valley on Sunday. Roads twisted and water mains burst. It was the wine country’s most severe quake in 15 years, and while hospitals treated many people, no one was killed. Arash Arabasadi has more from Washington on what the future may hold for those residents living on a fault line.
Video

Video Scientists Unlock Mystery of Bird Flocks

How can flocks of birds, schools of fish or herds of antelope suddenly change direction -- all the individuals adjusting their movement in concert, at seemingly the same time? British researchers now have some insights into this behavior, which has puzzled scientists for a long time. VOA's George Putic has more.
Video

Video Ukraine: Captured Troops Proof of Russian Role in Separatist Fight

Ukrainian officials say they have captured Russian soldiers on Ukrainian territory -- the latest accusation of Moscow's involvement in the conflict in eastern Ukraine. VOA's Gabe Joselow reports from the Ukrainian side of the battle, where soldiers are convinced of Russia's role.
Video

Video Rubber May Soon Come From Dandelions

Synthetic rubber has been around for more than a century, but quality tires for cars, trucks and aircraft still need up to 40 percent or more natural rubber content. As the source of natural rubber, the rubber tree, is prone to disease and can be affected by bad weather. So scientists are looking for replacements. And as VOA’s George Putic reports, they may have found one in a ubiquitous weed.
Video

Video Jewish Life in Argentina Reflected in Yiddish Tango

Jewish people from across Europe and Russia have been immigrating to Argentina for hundreds of years. They brought with them dance music that were eventually mixed with Argentine tango. The result is Yiddish tango -- a fusion of melodies and cultural experiences that is still evolving today. Elizabeth Lee reports from the Skirball Cultural Center in Los Angeles, where one band is bringing Yiddish tango to an American audience.

AppleAndroid