Navigation Links
Roots Engage in Underground Chemical Warfare

In addition to providing physical support and taking in nutrients, plant roots secrete a wide variety of compounds that affect other nearby roots, as well as insects and microbes. But because it goes on unseen, bactericidal root activity has not been extensively investigated—until now. Using the model plant Arabidopsis thaliana, a relative of garden-variety cabbage, Jorge Vivanco and co-workers at Colorado State University, together with Frederick Ausubel at Harvard Medical School, demonstrated that "root exudates" contain antimicrobial agents that ward off the continual attacks by soil pathogens.

The work is published in the March 10 issue of the journal Nature.

The exudates from Arabidopsis roots kill a wide range of bacteria, confirming that roots are not always vulnerable, anchored targets. The natural production of these antimicrobial chemicals offers one explanation for why so few bacteria types actually cause disease in plants. Of the more than 50,000 plant diseases occurring in the United States, fungal pathogens are the leading cause.

"Current understanding of plant defenses does not readily explain why a pathogen can cause disease in one plant species and not another," says Vivanco. "Our findings will help researchers solve the mysteries of plant disease and immunity."

In these experiments, however, root exudates did not kill all of the tested strains of bacteria. One particular strain of Pseudomonas syringae, a bacterium that causes disease in both tomatoes and Arabidopsis, has a seemingly fail-safe mechanism to overcome the plant's defenses. The bacterium not only survives exposure to the antimicrobial substances, it also blocks the plant's ability to produce them.

Both Vivanco and Ausubel are supported by separate awards from the division of Molecular and Cellular Biosciences at the National Science Foundation (NSF).

Vivanco is a recipient of NSF's prestigious Faculty Early Career Development Award (CAREER) . CAREER awards support the early career development of those researcher-educators who are deemed most likely to become the academic leaders of the 21st century. Parag Chitnis, the NSF program manager of Vivanco's award said, "This work is an exciting outcome of a bold and challenging project. The work paves the way to understand and combat crop diseases."

The program manager for Ausubel's award, Michael Mishkind said, "The puzzle of why so few bacterial species are pathogens remains a fascinating problem. The simple, yet elegant experimental approaches used by this team uncovered a critical aspect of the battle that occurs between plants and microbes.


'"/>

Source:National Science Foundation


Related biology news :

1. Underground tunnels discovered as means for communication between immune system cells
2. Chemicals in tattoo inks need closer scrutiny
3. Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips
4. Chemical band-aid prevents heart failure in mice with muscular dystrophy
5. Chemical compound inhibits tumor growth, size in new mouse study
6. T-rays: New imaging technology spotlighted by American Chemical Society
7. Chemical warfare agent detection technology used to treat lung disease
8. Chemical guidance of T cells leads to immunologic memory and long-term immunity
9. Chemical signaling helps regulate sensory map formation in the brain
10. Chemical in many air fresheners may reduce lung function
11. Chemical tests of cell growth enter third dimension
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/14/2016)... March 14, 2016 http://www.apimages.com ... --> - Renvoi : image disponible via ... --> --> DERMALOG, le ... de nouveaux lecteurs d,empreintes digitales pour l,enregistrement des ... sera utilisé pour produire des cartes d,identité aux ...
(Date:3/11/2016)... --> --> ... Recognition Market by Technology (Pattern Recognition), by Component (Hardware, ... Type (On-Premises and Cloud), by Industry Vertical and by ... the global market is expected to grow from USD ... 2020, at a CAGR of 19.1%. , ...
(Date:3/10/2016)... , March 10, 2016   Unisys Corporation (NYSE: ... Border Protection (CBP) is testing its biometric identity solution ... Diego to help identify certain non-U.S. citizens leaving ... The test, designed to help determine the efficiency and accuracy ... in February and will run until May 2016. --> ...
Breaking Biology News(10 mins):
(Date:5/23/2016)... San Antonio, Texas (PRWEB) , ... May 23, 2016 , ... The need for blood ... infographic released this week by the South Texas Blood & Tissue Center, blood donations are ... more than 30 years, and they are down 21 percent in South Texas in the ...
(Date:5/23/2016)... 23, 2016 Oxitec CEO Hadyn ... at 10:15 a.m. ET before the United States House Committee ... mosquitos can play in controlling the spread of the ... virus.      (Logo: http://photos.prnewswire.com/prnh/20150630/227348 ) ... a self-limiting gene. Trials in Brazil , ...
(Date:5/23/2016)... Alto, CA (PRWEB) , ... May 23, 2016 ... ... and public interest organization focused on molecular nanotechnology, announced the winners for the ... of pioneer physicist Richard Feynman, are given in two categories, one for experiment ...
(Date:5/20/2016)... Minneapolis, MN (PRWEB) , ... May 20, 2016 , ... ... and consumer goods companies, today announced its official 25th anniversary of the business. “We ... we are so grateful to our customers for the privilege and honor of serving ...
Breaking Biology Technology: