Navigation Links
Researchers discover primer to plant defense system
Date:4/3/2009

OAK RIDGE, Tenn., April 3, 2009 -- By identifying a novel compound that primes a plant's immune system, researchers at Oak Ridge National Laboratory and the University of Chicago may be on a path to developing disease-resistant plants.

In a paper published in Science, a team that includes Tim Tschaplinski of the Department of Energy's ORNL reports that azelaic acid has a role in priming the immunity response in Arabidopsis, a small flowering plant related to cabbage and mustard. This plant, commonly known as thale cress or mouse-ear cress, is widely used as a model organism for studying higher plants.

While Tschaplinski acknowledged that this field is in its infancy and involves a very complex network of responses, he and co-authors are excited about what may lie ahead.

"Long term, this discovery may prove useful for preventing diseases in crops and other plants, and perhaps for generating plants that are more disease-resistant in the first place," said Tschaplinski, a member of ORNL's Environmental Sciences Division.

The discovery was actually made when Tschaplinski kept noticing a persistent mass spectral signature that occurred soon after Arabidopsis plants were exposed to a bacterial pathogen. The signal matched a pattern in a database of mass spectral signatures of Arabidopsis metabolites and prompted Tschaplinski to have a conversation with the University of Chicago's Jean Greenberg and postdoctoral scholar Ho Won Jung. Their discussion led to some additional research and this paper, titled "Priming in Systemic Plant Immunity."

Among key findings was that plants can boost their overall immunity to infection once they have a local exposure to certain pathogenic microbes. This occurs through a series of steps, beginning with a primary infection that causes the plant to induce defenses to contain the spread and growth of the pathogen. The infection causes the plant to produce more azelaic acid, which stimulates the production of AZ11, a protein that the researchers found to be essential for the increased systemic plant immunity.

Azelaic acid moves throughout the stem and leaves and bolsters the plant's immune system so it can respond quicker and more effectively to diseases compared to nave plants, according to the researchers. Through this process, plants accumulate very high levels of the defense signal salicylic acid, and this helps inhibit the progression of secondary infections.

"With respect to future science, a number of other novel signatures are clearly evident and can be pursued as a component of the plant-microbe scientific focus area if that is a route we decide to go," Tschaplinski said.

In the meantime, the authors note that, "The identification of novel systemic acquired resistance components may be useful for plant protection and provides new insight into how some interactions trigger systemic plant immunity."


'/>"/>

Contact: Ron Walli
wallira@ornl.gov
865-576-0226
DOE/Oak Ridge National Laboratory
Source:Eurekalert

Related biology news :

1. MDC researchers prevent virus induced myocarditis
2. Researchers examine bacterial rice diseases, search for genetic solutions
3. UC Davis researchers identify a protein that may help breast cancer spread, beat cancer drugs
4. Researchers discover link between schizophrenia and diabetes
5. Cancer Genomics Browser gives cancer researchers a powerful new tool
6. Mayo Clinic researchers discover and manipulate molecular interplay that moves cancer cells
7. Two Hutchinson Center researchers named HHMI Early Career Scientists
8. Tiny but toxic: MBL researchers discover a mechanism of neurodegeneration in Alzheimers disease
9. Researchers develop flow sensors based on hair structures of blind cavefish
10. To fight drug addiction, UB researchers target the brain with nanoparticles
11. Diabetics on high-fiber diets might need extra calcium, report UT Southwestern researchers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... , April 11, 2017 Crossmatch®, ... secure authentication solutions, today announced that it has ... Advanced Research Projects Activity (IARPA) to develop next-generation ... program. "Innovation has been a driving ... Thor program will allow us to innovate and ...
(Date:4/5/2017)... SEATTLE , April 5, 2017  The Allen ... the Allen Cell Explorer: a one-of-a-kind portal and dynamic ... large-scale 3D imaging data, the first application of deep ... edited human stem cell lines and a growing suite ... the platform for these and future publicly available resources ...
(Date:3/30/2017)... , March 30, 2017  On April 6-7, 2017, ... the Genome hackathon at Microsoft,s headquarters in ... competition will focus on developing health and wellness apps ... Hack the Genome is the first hackathon ... The world,s largest companies in the genomics, tech and ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... At its national board meeting ... I. Sheikh, the co-founder, CEO and chief research scientist of Minnesota-based Advanced Space ... membership in ARCS Alumni Hall of Fame . ASTER Labs is a ...
(Date:10/11/2017)... Md. (PRWEB) , ... October 11, 2017 , ... ... digital pathology, announced today it will be hosting a Webinar titled, “Pathology is ... Advanced Pathology Associates , on digital pathology adoption best practices and how Proscia ...
(Date:10/11/2017)... , ... October 11, 2017 , ... ... the implantation and pregnancy rates in frozen and fresh in vitro fertilization ... progesterone and maternal age to IVF success. , After comparing the results from ...
(Date:10/10/2017)... ... October 10, 2017 , ... For the second ... a US2020 STEM Mentoring Award. Representatives of the FirstHand program travelled to Washington, ... from US2020. , US2020’s mission is to change the trajectory of STEM education ...
Breaking Biology Technology: