Navigation Links
How plants 'feel' the temperature rise
Date:1/10/2010

Plants are incredibly temperature sensitive and can perceive changes of as little as one degree Celsius. Now, a report in the January 8th issue of the journal Cell, a Cell Press publication, shows how they not only 'feel' the temperature rise, but also coordinate an appropriate response -- activating hundreds of genes and deactivating others; it turns out it's all about the way that their DNA is packaged.

The findings may help to explain how plants will respond in the face of climate change and offer scientists new leads in the quest to create crop plants better able to withstand high temperature stress, the researchers say.

"We've uncovered a master regulator of the entire temperature transcriptome," said Philip Wigge of John Innes Centre in the United Kingdom in reference to the thousands of genes that are differentially activated under warmer versus cooler conditions.

Using the model plant Arabidopsis thaliana the researchers show that a key ingredient for plants' temperature sensing ability is a specialized histone protein, dubbed H2A.Z, that wraps DNA into a more tightly packed structure known as a nucleosome. Wigge likens nucleosomes to compact balls of string. As temperatures rise, H2A.Z histones allow DNA to progressively unwrap, leading nucleosomes to loosen up, they show.

"When it gets warmer, the DNA unwraps," he said, which allows some genes to switch on and others to switch off. They aren't yet sure exactly how all that happens, but Wigge suspects the altered nucleosome structure gives access to sites on the DNA where activators of some genes can bind along with repressors of other genes.

"In addition to H2A.Z containing nucleosomes having more tightly wrapped DNA, our results suggest that the degree of unwrapping may also be responsive to temperature," the researchers wrote. "This result suggests a direct mechanism by which temperature may influence gene expression, since it has been sh
'/>"/>

Contact: Cathleen Genova
cgenova@cell.com
617-397-2802
Cell Press
Source:Eurekalert

Page: 1 2

Related biology news :

1. Virus may chauffeur useful packages into plants
2. Engineered tobacco plants have more potential as a biofuel
3. Carnegie Mellon engineers develop machine that visually inspects and sorts strawberry plants
4. Newly identified enzymes help plants sense elevated CO2 and could lead to water-wise crops
5. Experts: Disease-resistant plants enhance profits, client satisfaction
6. Study finds new relationship between gene duplication and alternative splicing in plants
7. Scientists think killer petunias should join the ranks of carnivorous plants
8. How did flowering plants evolve to dominate Earth?
9. UNH prof. receives nearly $500,000 to research environmentally significant plants
10. Gene mismatch influences success of bone marrow transplants
11. Its a gas: New discovery may lead to heartier, high-yielding plants
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/20/2014)... chili pepper causes a burning spiciness that is irresistible ... chili pepper,s effect are using their findings to develop ... which can be caused by inflammation or other problems. ... being tested in clinical trials, in ACS, Journal ... explain that decades ago, scientists had pegged a compound ...
(Date:8/20/2014)... Women who are poor experience higher cortisol levels ... levels of the stress hormone, putting them at ... to a new research from the University of Colorado ... American Journal of Human Biology , is the ... directly to the socioeconomic status of their mothers during ...
(Date:8/20/2014)... North Carolina State University researchers have developed methods for ... monitoring the electrical signals moths use to control those ... of remotely-controlled moths, or "biobots," for use in emergency ... know whether we can control the movement of moths ... operations," says Dr. Alper Bozkurt, an assistant professor of ...
Breaking Biology News(10 mins):CU Denver researcher shows economic disparities impact infant health 2Research paves way for development of cyborg moth 'biobots' 2
... lives and livelihoods of some of the poorest people on ... the Times Higher Education awards ceremony in London, Dr Bhaskar ... and Civil Engineering received the Outstanding Engineering Research Team of ... in tackling the world,s worst case of ongoing mass poisoning ...
... mystery of how an abundance of fossils have been marvellously ... region of Africa has been solved by a team of ... They have established that an ancient wind brought life to ... of the dead. Sarah Gabbott, Jan Zalasiewicz and colleagues ...
... garden bird of many countries in Europe and Asia. ... it has long been known individuals vary considerably in their ... as "fast" or "proactive" are quick explorers and are ... The differences are at least in part genetically determined ...
Cached Biology News:Queen's life-saving research wins education 'Oscar' 2Bird-brained? Birds' personalities are correlated with their hormone levels 2
(Date:8/19/2014)... 19, 2014 /PRNewswire/ - iCo Therapeutics Inc. ("iCo" or ... results of its Oral Amphotericin B (Oral Amp ... study, conducted by ImmuneCarta®, the immune monitoring business ... effectiveness of Oral Amp B in reactivating latent ... despite intensive treatment with antiretroviral therapy. ...
(Date:8/18/2014)... 18, 2014 /PRNewswire/ - SQI Diagnostics Inc. (TSX-V: SQD), a ... and products for advanced microarray diagnostics, today announced it ... 22 at 2:00 pm ET.  During ... a brief review of SQI,s recent commercialization progress and ... industry veteran recently appointed to the Board of Directors ...
(Date:8/18/2014)... HIV Infection Drug Market and Pipeline Insight is a ... infection and the number of deaths due to AIDS has ... the globe. It has been estimated that the death rate ... with the rates for children being even much lower. A ... has been the improved access to antiretroviral drugs and therapy ...
(Date:8/18/2014)... Aug. 18, 2014 Dyadic International, Inc. ... patented and proprietary technologies are used to develop, ... the bioenergy, bio-based chemical, biopharmaceutical and industrial enzyme ... Registration Statement on Form 10 with the U.S. ... Logo - http://photos.prnewswire.com/prnh/20110621/CL06708LOGO ...
Breaking Biology Technology:iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 2iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 3SQI Diagnostics Announces Investor Conference Call with Dr. Allan Pronovost 2SQI Diagnostics Announces Investor Conference Call with Dr. Allan Pronovost 3Global HIV Infection Drug Market Overview 2Global HIV Infection Drug Market Overview 3Global HIV Infection Drug Market Overview 4Dyadic International Files Form 10 Registration Statement 2Dyadic International Files Form 10 Registration Statement 3Dyadic International Files Form 10 Registration Statement 4
... broad corporate changes are ... ... Board: AVNA) today reported financial results for its first,quarter ended March ... Company refocused its business model from managing the,development of a portfolio ...
... Technology Distributors ... 2007., PLEASANTON, Calif., May 19 Direct Medical ... distribution network covering all,of Russia. This partnership has resulted ... volume sales to a number of medical,providers in Russia., ...
... W. Freston Single Topic Conference Series for ... Gastroenterology ... (AGA) Foundation for Digestive Health and Nutrition (FDHN),announced a gift ... Fund within the AGA Foundation,s overall endowment.,Interest earned from The ...
Cached Biology Technology:Advance Nanotech Reports First Quarter 2008 Financial Results 2Advance Nanotech Reports First Quarter 2008 Financial Results 3Advance Nanotech Reports First Quarter 2008 Financial Results 4Advance Nanotech Reports First Quarter 2008 Financial Results 5Advance Nanotech Reports First Quarter 2008 Financial Results 6Advance Nanotech Reports First Quarter 2008 Financial Results 7Advance Nanotech Reports First Quarter 2008 Financial Results 8Advance Nanotech Reports First Quarter 2008 Financial Results 9Advance Nanotech Reports First Quarter 2008 Financial Results 10Direct Medical Systems Reaches Profitability in 2-1/2 Years, as a Result of Sales of the World's Smallest and Lightest Ultrasound System, the InNovaSound USB Ultrasound. 2Takeda Pharmaceuticals Establishes $3 Million Endowment with AGA Foundation 2Takeda Pharmaceuticals Establishes $3 Million Endowment with AGA Foundation 3Takeda Pharmaceuticals Establishes $3 Million Endowment with AGA Foundation 4