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:1/30/2017)... , Jan. 30, 2017   Invitae Corporation ... fastest growing genetic information companies, today announced that it ... results and provide 2017 guidance on Monday, February 13, ... call that day at 4:45 p.m. Eastern / 1:45 ... management team will briefly review financial results, guidance, and ...
(Date:1/25/2017)... , Jan. 25, 2017 The Elements ... Management (IAM) lifecycle is comprised of a comprehensive ... the purpose of maintaining digital identities and providing ... and applications. There are significant number of programs ... time to time by optimizing processes and changing ...
(Date:1/23/2017)...  The latest mobile market research from Acuity Market ... The quarterly average price of a biometric smartphone decreased ... 2016.  There are now 120 sub-$150 models on the ... just 28 a year ago at an average price ... Most , Acuity Market Intelligence Principal, "Biometric Smartphones are ...
Breaking Biology News(10 mins):
(Date:2/24/2017)... -- China Cord Blood Corporation (NYSE: CO ... cord blood collection, laboratory testing, hematopoietic stem cell processing ... financial results for the third quarter and first nine ... Third Quarter of Fiscal 2017 Highlights ... 2017 increased by 18.6% to RMB200.9 million ($28.9 million). ...
(Date:2/24/2017)... (NASDAQ: VWR), the leading global independent provider of product and ... financial results for the fourth quarter and full year ended ... 4Q16 record quarterly net sales of $1.13 billion, up 1.6% ... 4Q16 EMEA-APAC segment net sales increased 0.4%, ... sales increased 2.5%, or down 0.9% on an organic basis, ...
(Date:2/23/2017)... RAFAEL, Calif., Feb. 23, 2017 ... U.S. dollars, except per share data, unaudited)Three Months Ended ... ChangeTotal BioMarin Revenue $   ...   22832%$ 1,117$   89026%Aldurazyme Net Product Revenue ... 906538%34823946%Naglazyme Net Product Revenue  ...
(Date:2/23/2017)... , Feb. 23, 2017  MIODx announced ... for two key immunotherapy technologies from the University ... provides a method to monitor a patient for ... PD-L1 and CTLA-4.  The second license extends the ... patient is likely to have an immune-related adverse ...
Breaking Biology Technology: