Navigation Links
Researchers develop flood-tolerant California rice

Rice grown anywhere in the world soon could be made completely flood-tolerant because of new research by UC Riverside geneticists, done in collaboration with scientists at UC Davis and the International Rice Research Institute in the Philippines. By gradually introducing into California rice "submergence tolerance," a property that enables rice to survive extreme flood conditions, the researchers show how potentially any variety of rice could be made to survive short-term floods that completely submerge the rice plant ?a result benefiting rice farmers worldwide.

The researchers are the first to identify a small cluster of related genes responsible for providing a line of Indian rice with the capacity to survive complete submergence for more than two weeks. The researchers transferred this cluster of genes into California rice by first cross-pollinating the Indian and California rice and then continuing the cross breeding over several generations until all the Indian rice genes, except the cluster of genes needed for submergence tolerance, were gradually replaced with genes from the California rice. The result was California rice that can withstand floods in which the rice plant is completely submerged.

Study results appear in this month's issue of The Plant Cell.

In their work, led by Julia Bailey-Serres, a professor of genetics at UCR, the researchers evaluate two nearly genetically identical lines of California rice: the original submergence intolerant line and the new submergence tolerant line. A careful comparison of the two California rice lines showed that in the submergence tolerant line the rice plants orchestrate a number of cellular responses to submergence that are controlled by specific genes present in the submergence gene cluster. The researchers report that this cluster, which originated in the Indian rice and was bred into the California rice, is responsible for changes in cell metabolism and growth while the plant is submerged.

"One of the genes in the submergence gene cluster makes rice conserve the carbohydrate reserves in the plant leaves when the plant is submerged, resulting in a controlled growth for the plant," said Bailey-Serres, who is a member of UCR's Center for Plant Cell Biology. "Rice plants that lack this particular gene, however, are not able to conserve their carbohydrates. They end up with accelerated growth and ultimately exhaust themselves."

Flooding of croplands is a frequent natural disaster in many regions of the world, reducing crop productivity. While rice, the primary food for more than 3 billion people, thrives in standing water, it dies if it is completely submerged for more than four days. Water covering the rice plant reduces the plant's oxygen and carbon dioxide supplies, affecting photosynthesis and respiration. Submerged, the plants lack the gases needed to produce sugar for cellular energy, resulting in death if submergence persists beyond four days.

Bailey-Serres notes that access today to information about the rice genome ?all the genetic material in the chromosomes of rice ?has greatly accelerated progress in identifying specific genes that confer specific traits. "Currently, the International Rice Research Institute is actively crossing the submergence tolerant Indian rice with lines of rice that are widely grown in southeast Asia in order to produce new lines of rice that can grow in flood-prone areas," she said.

In the future, Bailey-Serres and colleagues plan to work on developing crops that are resistant to multiple stresses. "For example, we'd like to develop rice that is both submergence and salt tolerant," she said, "given that many flood-prone areas are a mixture of fresh and salt water."

Besides Bailey-Serres, Takeshi Fukao of UCR; and Kenong Xu and Pamela C. Ronald of UC Davis collaborated on the study, which was funded by grants from the United States Department of Agriculture and the United States Agency for International Development. Fukao is the first author of the research paper.
'"/>

Source:University of California - Riverside


Related biology news :

1. Researchers discover way to make cells in the eye sensitive to light
2. Researchers find how protein allows insects to detect and respond to pheromones
3. Researchers Uncover Key Step In Manufacture of Memory Protein
4. Researchers reveal the infectious impact of salmon farms on wild salmon
5. Researchers identify target for cancer drugs
6. Researchers discover molecule that causes secondary stroke
7. Researchers find missing genes of ancient organism
8. Researchers trace evolution to relatively simple genetic changes
9. Researchers add new tool to tumor-treatment arsenal
10. UF Researchers Map Bacterial Proteins That Cause Tooth Loss
11. VCU Researchers Identify Networks Of Genes Responding To Alcohol In The Brain

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/25/2016)... , Jan. 25, 2016  Glencoe Software, the ... pharma and publication industries, will provide the data management ... Centre (NPSC). ... Phenotypic analysis measures ... whole organisms, allowing comparisons between states such as health ...
(Date:1/21/2016)... , January 21, 2016 ... to a new market research report "Emotion Detection and ... Others), Software Tools (Facial Expression, Voice Recognition and ... - Global forecast to 2020", published by MarketsandMarkets, ... expected to reach USD 22.65 Billion by 2020, ...
(Date:1/20/2016)... Jan. 20, 2016  Synaptics Incorporated (NASDAQ: ... solutions, today announced sampling of S1423, its newest ... and small screen applications including smartwatches, fitness trackers, ... round and rectangular shapes, as well as thick ... with moisture on screen, while wearing gloves, and ...
Breaking Biology News(10 mins):
(Date:2/6/2016)... ... 06, 2016 , ... The Center for Excellence in Education (CEE) will sponsor ... on Wednesday February 10, 2016. This Bite of Science session, hosted by the ... at 1500 Remount Road in Front Royal, VA from 5:00 p.m. to 8:00 p.m. ...
(Date:2/5/2016)... 2016  In the pharmaceutical industry the medical affairs ... launch activities including the identification and engagement of key ... especially high in the oncology therapeutic area where most ... the Role of Medical Affairs in Oncology Launch Excellence ... therapies find better ways to utilize medical affairs to ...
(Date:2/5/2016)... 5, 2016 Australian-US drug discovery and development company, ... appointment of a new Chairman, Mr John O,Connor , ... immediately. James Garner , has also been ... former Acting CEO, Mr Iain Ross , will resume ... --> James Garner , has also been formally appointed ...
(Date:2/4/2016)... , Feb. 4, 2016  Sangamo BioSciences, Inc. ... editing, announced today that Edward Lanphier , Sangamo,s ... on the progress of Sangamo,s ZFP Therapeutic ® ... strategy at 2:40 pm ET on Thursday, February 11, ... Global Healthcare Conference. The conference is being held in ...
Breaking Biology Technology: