HOME >> BIOLOGY >> NEWS
Study explains how pathogens evolve to escape detection

An arms race is under way in the plant world. It is an evolutionary battle in which plants are trying to beef up their defenses against the innovative strategies of pathogens. The latest example of this war is a bacterium (Pseudomonas syringae) that infects tomatoes by injecting a special protein into the plant's cells and undermines the plant's defense system.

"Plant breeders often find that five or six years after their release, resistant plant varieties become susceptible because pathogens can evolve very quickly to overcome plant defenses," said Gregory Martin, Cornell professor of plant pathology, a scientist at the Boyce Thompson Institute for Plant Research (BTI) on the Cornell campus and the senior author of the research paper, published in the July 19 issue of the journal Nature. "However, every now and then, breeders develop a plant variety that stays resistant for 20 years or more."

Understanding why some varieties have more durable disease resistance is important to the development of more sustainable agricultural practices, he said.

The study by Cornell and BTI scientists describes how a single bacterial protein, AvrPtoB, which is injected by P. syringae into plant cells through a kind of molecular syringe, can overcome the plant's resistance. Normally, the plant's defense system looks out for such pathogens and, if detected, mounts an immune response to stave off disease. As part of this surveillance system, tomatoes carry a protein in their cells called Fen that helps detect P. syringae and trigger an immune response.

But some strains of P. syringae have evolved the AvrPtoB protein that mimics a tomato enzyme known as an E3 ubiquitin ligase, which tags proteins to be destroyed. Once injected, AvrPtoB binds the Fen protein, and the plant's own system eliminates it, allowing the bacteria to avoid detection and cause disease.

"This paper explains how a pathogen can evolve to escape detection," said
'"/>

Contact: Blaine Friedlander
bpf2@cornell.edu
607-254-8093
Cornell University News Service
18-Jul-2007


Page: 1 2

Related biology news :

1. Study begins to reveal clues to the cause and progression of sepsis
2. Study finds gender differences in renal and other genes contributing to blood pressure
3. Study suggests estrogen deficiency can lead to obesity-induced high blood pressure after menopause
4. Study: Sticking to the sand might not be such good, clean fun for beachgoers
5. Study points to new way to predict death risk from torn aorta
6. Study identifies new gene therapy tools for inherited blindness
7. Study finds contaminated water reaching Floridas offshore keys
8. Study sheds light on why humans walk on two legs
9. Study finds hereditary link to premenstrual depression
10. Study identifies energy efficiency as reason for evolution of upright walking
11. Study shows cane sugar, corn sweeteners have similar effects on appetite

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/24/2017)... Research and Markets has announced the addition ... Trends - Industry Forecast to 2025" report to their offering. ... The Global Biometric ... of around 15.1% over the next decade to reach approximately $1,580 ... market estimates and forecasts for all the given segments on global ...
(Date:3/22/2017)... YORK , March 21, 2017 ... Marketing Cloud used by retailers such as 1-800-Flowers ... its platform — Product Recommendations and Replenishment. Using Optimove,s ... give more personalized product and replenishment recommendations to ... but also on predictions of customer intent drawn ...
(Date:3/16/2017)... 2017 - Against identity fraud with DERMALOG solutions "Made in Germany "  ... ... project, multi-biometric solutions provide a crucial contribution against identity fraud. (PRNewsFoto/Dermalog Identification Systems) ... Used combined in one project, multi-biometric solutions provide a crucial contribution against ... ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... May 23, 2017 , ... ... its 20th anniversary, marking the occasion with a strong presence at Bio-IT World ... Reception and further extends an invitation to all attendees to view posters ...
(Date:5/23/2017)... (PRWEB) , ... May 23, 2017 , ... Vortex ... of “Label-free isolation of prostate circulating tumor cells using Vortex microfluidic technology ” ... result of a collaboration with Dr. Dino Di Carlo and Dr. Matthew Rettig at ...
(Date:5/23/2017)... ... 2017 , ... Bacterial biofilms, surface adherent communities of bacteria that are encased ... food poisoning and catheter infections to gum disease and the rejection of medical implants. ... dollars per year, there is currently a paucity of means for preventing their formation ...
(Date:5/22/2017)... ... May 22, 2017 , ... Stratevi, a boutique firm that partners with healthcare ... has opened an office in downtown Boston at 745 Atlantic Ave. , “We ... to generate evidence on the value they provide, not just to patients, but also ...
Breaking Biology Technology:
Cached News: