Navigation Links
Plant defenses prompt bacterial countermeasure in the form of 'island' DNA excision

Seeking to catch an arms-race maneuver in action, researchers have uncovered new evidence to explain how bacteria in the process of infecting a plant can shift molecular gears by excising specific genes from its genome to overcome the host plant's specific defenses.

Throughout evolution ?in the wild and in crops cultivated by humans ?plants have developed systems for resisting the attack of microbial pathogens, while these microbes themselves have depended on their ability to alter molecular attack strategies in order to flourish. In the new work, researchers have essentially caught one step of this arms race in action, and they have shed light on the molecular mechanisms employed by a bacterial pathogen to survive in the face of its host plant's defenses. The research is reported by John Mansfield and colleagues at Imperial College London, the University of the West of England, and the University of Bath.

Studying interactions between strains of the halo-bright pathogen and bean plants, the researchers found that the pathogenic bacteria essentially kicks out a section of its genome when it senses that its presence has been detected by the plant's defense system. Excising this so-called "genomic island" eliminates production of the bacterial protein detected by the plant and allows a more stealthy ?and successful ?invasion.

The reason the strategy can be successful is that the plant has evolved to recognize the presence of only certain bacterial proteins as warnings of an infection. This means that the bacteria can, in principle, evade detection if it can shut down production of the offending protein or proteins. In their study, the authors identify within the halo-bright pathogen genome a special island of DNA that encodes one such offending protein. But this genomic island also encodes enzymes that, when switched on, snip the DNA on either side of the island, resulting in the excision of the entire island from the genome. The researchers fou
'"/>

Source:Cell Press


Page: 1 2

Related biology news :

1. Quantum Dots Research Leads to New Knowledge about Protein Binding in Plants
2. Plants, animals share molecular growth mechanisms
3. Plants respond similarly to signals from friends, enemies
4. Affymetrix Unveils Plans to Double Plant and Animal Genome Microarray Offering
5. Plant hemoglobins: Oxygen handlers critical for nitrogen fixation
6. Plants defy Mendels inheritance laws, may prompt textbook changes
7. Whats really making you sick? Plant pathologists offer the science behind Sick Building Syndrome
8. Plant Sacrifices Cells to Fight Invaders
9. Breakthrough System for Understanding Ocean Plant Life Announced
10. Plant pathologists evaluate eco-friendly alternatives to methyl bromide
11. Study: Plants use dual defense system to fight pathogens
Post Your Comments:
(Date:7/7/2015)... , June 30, 2015 ... announced the addition of the "Capacitive Fingerprint ... To this date, fingerprint sensing technology ... and fingerprint sensors are well developed. This patent ... technology. The domain of capacitive fingerprint ...
(Date:7/2/2015)... , June 25, 2015 ... of the "Next Generation Biometrics Market by Application, ... report to their offering. The next ... by 2020, at a CAGR of 17.9% between 2015 ... leading application for the market. Safran SA ...
(Date:6/29/2015)... , June 24, 2015 ... of the "Latin America Biomedical Sensors Market - ... offering. The Latin America Biomedical Sensors market ... CAGR of 2.04% over the period 2014-2020 ... adaptable to the genetic formulation of each individual. These ...
Breaking Biology News(10 mins):Worldwide Capacitive Fingerprint Sensors Patent Landscape Market Report 2015-2020 - Main IP Holders include Seiko Epson, AuthenTec, Sony and STMicroelectronics 2Next Generation Biometrics Market 2015 - Global Forecast to 2020 with Safran, NEC, 3M Cogent, Fujitsu & Suprema Dominating the $24 Billion Market 2Next Generation Biometrics Market 2015 - Global Forecast to 2020 with Safran, NEC, 3M Cogent, Fujitsu & Suprema Dominating the $24 Billion Market 3Latin America Biomedical Sensors Market Report 2015-2020 2
... When we absorb new information, the human brain reshapes itself ... new knowledge kept, and how does that capacity to adapt ... senile dementia later in our lives? Dr. Yaniv Assaf ... new way to track the effect of memory on brain ...
... Arizona researchers have added another piece to the ... to treat patients in cardiac arrest, "passive ventilation" significantly ... ventilation." The study, published in an online edition ... patients who had suffered a cardiac arrest outside a ...
... Jerusalem have succeeded for the first time in devising ... mechanism that enables networks of neurons to efficiently decode ... lead to the upgrading of computer algorithms for faster ... the development of innovative treatments for auditory problems among ...
Cached Biology News:A window into the brain 2Cardiac arrest resuscitation: Passive oxygen flow better than assisted ventilation 2Hebrew U. researchers shed light on the brain mechanism responsible for processing of speech 2
(Date:7/30/2015)... Ascendis Pharma A/S (Nasdaq: ASND ... TransCon technology to address significant unmet medical needs, ... Phase 2 study to evaluate the safety and ... treatment-naïve, pre-pubertal children with growth hormone deficiency, or ... the top-line results from our Phase 2 pediatric ...
(Date:7/30/2015)... ... July 30, 2015 , ... GEA's ... designed for continuous operation up to 1500 bar. The sanitary design gauge of ... preventing toxic contamination. , The Pony™ NS2006L homogenizer is an ideal solution for ...
(Date:7/29/2015)... , July 29, 2015 US-Australian drug ... ) today confirmed it is committed to progressing its ... soon as practicable and to ensure the Company delivers ... Executive Officer, Iain Ross , said the Company ... the lead pre-clinical programs, discovery programs and academic partnerships ...
(Date:7/29/2015)... FRANCISCO , July 29, 2015  AsureQuality ... mobile molecular testing for applications in food and ... hand-held, battery powered real-time PCR device, the Freedom4. ... farm right through to the supermarket shelf for ... This includes involvement in animal disease control and ...
Breaking Biology Technology:Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 2Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 3Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 4Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 5Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 6Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 7GEA Announces the Pony™ NS2006L… a Self-contained, High Pressure Lab Homogenizer for Product Development Ensuring Maximum Efficiency and Safety 2Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 2Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 3Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 4Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 5Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 6Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 7Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 8Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 9Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 10AsureQuality and Ubiquitome Partner on Applications for Mobile Molecular Food Safety Testing 2
... (PDL) (Nasdaq: PDLI ) today announced that it ... $0.50 per share to all stockholders owning shares of PDL ... As previously announced, the conversion rate for the Company,s ... to 140.571 shares of common stock per $1,000 principal amount ...
... 1 Maven Biotechnologies today announced that the company ... for Allergy and Infectious Disease (NIAID), part of the ... imaging technology for label-free protein microarrays and cell-based ... through the federal stimulus package initiative for Biomedical Research, ...
... The Culex quinquefasciatus mosquito poses a significant ... elephantiasis-causing worms and encephalitis-inducing viruses. An international team of ... the SIB Swiss Institute of Bioinformatics sequenced its genome ... published in today,s issue of Science, describe results from ...
Cached Biology Technology:Maven Biotechnologies Receives $1.96 Million From the National Institutes of Health (NIH) to Develop Their LFIRE™ Label-Free Detection Technology for Proteomics 2Major disease-vector mosquito reveals the secrets of its immune system 2
... ovens are designed to create the ideal environment ... (ambient to 99.9C) , Variable speed control ... samples, whether it be for washing or hybridizing ... current temperature inside the chamber, ,is situated above ...
... magnetic particle based purification systems provide high ... any sample. They offer increased throughput and ... systems- KingFisher, KingFisher mL and KingFisher 96, ... l. Each system consists of an instrument, ...
... is the latest edition to the famous ... an extra large diameter exhaust port for ... panel allows precise setting and control of ... handling large quantities and samples , ...
... Thermo Savant SpeedVac Concentrators set the standard ... SC110A SpeedVac uses a combination of centrifugal force, ... a single run., SC110A comes equipped with:, , ... chemical compatibility , ...
Biology Products: