Navigation Links
Defenseless plants arm themselves with metals

ction when no metal was present.

"This difference in salicylic acid levels raises several questions," Salt said. "If you modify other plants so that the level of salicylic acid is always high, those plants are not happy. They look sickly. With salicylic acid continuously elevated, a plant thinks it's under some massive attack by a pathogen. It's expressing all its pathogen response proteins, and at such a high level, they can have a deleterious effect on the plant."

Metal hyperaccumulators like Thlaspi, however, don't show any negative effects from their constant exposure to high levels of salicylic acid.

"These plants have tons of salicylic acid, but for some reason that salicylic acid is not initiating the pathogen response. That tells us some part of the pathway doesn't sense salicylic acid - that the signal is blocked," he said. "It's like yelling into the phone louder and louder, but no one can hear it."

Salt and his colleagues also show in the current study that salicylic acid induces production of a molecule called glutathione, a potent antioxidant that protects plants from metal. Because the production of glutathione is tied to the production of salicylic acid, most plants normally have fairly low glutathione levels and, consequently, can't tolerate metals.

Thlaspi, on the other hand, is brimming with glutathione, thanks to its elevated salicylic acid levels. When grown in nickel-enriched soil, Thlaspi takes up 3 percent of its body weight in the metal. Salt and his colleagues have shown that this metal content is what makes the plants resistant to pathogens.

Salt proposes a scenario in which at some point in evolutionary history some plants acquired a mutation that disrupts the salicylic acid signaling pathway, leaving them unable to fight off pathogens.

"In most settings, those plants would be toast - they'd be immediately selected out of the population," he said. "This whole system raises the questio
'"/>

Source:Purdue University


Page: 1 2 3 4

Related biology news :

1. Emory Eye Center Implants Its First Retinal Chips In Patients With Retinitis Pigmentosa
2. Antibodies from plants protect against anthrax
3. New RNA polymerase discovered in plants
4. Transgenic plants remove more selenium from polluted soil than wild plants, new tests show
5. Scientists discover how plants disarm the toxic effects of excessive sunlight
6. At long last, scientists figure out how plants grow
7. Precise Timing Enabled Pig-to-rat Transplants To Cure Diabetes
8. Engineers improve plastics potential for use in implants by linking it to biological material
9. Innovative coating could give medical implants a longer life
10. Mechanism for the captation of nutrients in plants- unknown to date
11. Its electric: Cows show promise as powerplants
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Defenseless plants arm themselves with metals

(Date:9/30/2014)... Researchers of Ludwig-Maximilians-Universitaet (LMU) in Munich report that ... cells more sensitive to chemotherapeutic drugs. They have ... a new target for anti-tumor agents. , ... Professor Stephan Sieber of the Technische Universitt Mnchen ... a potential new weapon in the fight against ...
(Date:9/30/2014)... 30, 2014  Spectra Automation, a trusted ... biotech and power generation industries, announced today ... Manager, an easy-to-use and cost-effective data collection, ... development laboratories. Most upstream ... analyzer systems. Accessing and consolidating data from ...
(Date:9/29/2014)... Clostridium ramosum , coupled with a high-fat diet, may cause ... in mBio , the online open-access journal of the ... the German Institute of Human Nutrition Potsdam-Rehbruecke in Nuthetal observed ... gained weight when fed a high-fat diet. Mice that ... even when consuming a high-fat diet, and mice that had ...
Breaking Biology News(10 mins):Cancer therapy: Driving cancer cells to suicide 2Spectra Automation Introduces RECONN Bioprocess Manager 2Gut bacteria promote obesity in mice 2
... Leadership Strengthened with Clinical ... Standards-Based Data Management, WHIPPANY, N.J. and ATLANTA, ... it agreed to terms to acquire Zurich,Biostatistics, Inc. ... regulatory submissions, the acquisition further strengthens,ISI,s Clinical Data ...
... SHORES, Calif., Sept. 10 ,Communication Intelligence Corporation (OTC ... signature solutions for business process,automation in the financial ... announced today the appointment of Michael Betts to,the ... over 30 years of experience in the insurance ...
... J. Michael McConnell, Director of,National Intelligence and ... Intelligence will provide valuable insights into the intelligence,challenges ... the United States,Intelligence Community 100 Day Plan for ... The Office of the Director of National Intelligence ...
Cached Biology News:Image Solutions, Inc. Acquires Zurich Biostatistics, Inc. 2Image Solutions, Inc. Acquires Zurich Biostatistics, Inc. 3Michael A. Betts, Seasoned Financial Services Executive, Joins CIC Board of Directors 2Michael A. Betts, Seasoned Financial Services Executive, Joins CIC Board of Directors 3
(Date:10/1/2014)... The participants committed to not only creating ... own time adjusting, tweaking and testing virtual models and ... for judging. , “I enjoyed being involved as a ... “The entries showed a commendable range exploring the technical ... print medium and the creativity of the contestants.” , ...
(Date:10/1/2014)... 2014 In response to its ... address sales, training and consumer engagement challenges, ... mobile applications to turn their clients’ visions into ... customized mobile app creations, are now featured on ... partnership with Toyota, StudioPMG created a robust cross-platform ...
(Date:10/1/2014)... 30, 2014 Award winning unified ... announces four new-hosted collaboration bundles that combine next ... quality conferencing experiences for low, flat rate fees. ... from, businesses have optimized solutions to meet their ... include audio only minutes (1K, 5K, 10K increments) ...
(Date:10/1/2014)... (PRWEB) October 01, 2014 TeselaGen ... National Science Foundation to expand their bioCAD/CAM software suite, ... and modify DNA. The Small Business Innovation Research Phase ... “j5” technology under exclusive license from the Lawrence Berkeley ... BioEnergy Institute , an LBNL laboratory that develops alternative ...
Breaking Biology Technology:Array Architects Challenges Staff to Create with 3D Printer 2Digital Agency Studio PMG Launches New Case Studies on Website 2SoundConnect Launches New Audio, Web and Video Bundles 2TeselaGen Receives $750k NSF SBIR Phase II Award 2TeselaGen Receives $750k NSF SBIR Phase II Award 3
... Metformin on Insulin Sensitization Poster Wins One ... ... Seahorse Bioscience, Inc.,leaders in real-time measurement of cellular bioenergetics announced today,the ... award at the 16th European Congress on Obesity (ECO 2008) May ...
... Include Clinical Trial Updates, BETHESDA, Md., July ... OTC Bulletin Board: NWBO), (the,"Company or NWBT"), today ... Chief Executive Officer, will deliver a presentation updating,the ... for the,treatment of cancer, at the "Next Generation ...
... ARGONNE, Ill. (July 17, 2008) Researchers at the U.S. ... industrial partners have won two R&D 100 Awards for ... scientists have been awarded 101 R&D 100 Awards since ... a prestigious R&D 100 Award -- dubbed the "Oscars ...
Cached Biology Technology:Seahorse Bioscience Receives Poster Award from the European Association for the Study of Obesity 2Northwest Biotherapeutics to Present at Next Generation Vaccine Conference 2Argonne researchers win 2 R&D 100 Awards 2Argonne researchers win 2 R&D 100 Awards 3Argonne researchers win 2 R&D 100 Awards 4
... series of refrigerated cold traps offers a ... low volatility/aqueous solvents or high volatility solvents. ... vacuum concentrators/centrifugal evaporators. Also used for maintaining ... as used in electron microscopes. Can be ...
... Refrigerated Vapor Trap is specifically designed ... solvents such as DMSO and DMF ... constant temperature refrigeration system set at ... conditions for DMSO, while completely eliminating ...
96 Well Plate Sterile, RE bottom; consistent medium binding affinity for hydrophobic complexes and proteins....
Thermo Forma provides an array of accessory Racks for the Cryo/CryoPlus 16" Diameter storage system. To maximise inventory capacity a Jumbo Arrowhead configuration is recommended. You may choose betw...
Biology Products: