Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Genome study of beneficial microbe may help boost plant health

28.06.2005


In a study expected to greatly benefit crop plants, scientists have deciphered the genome of a root- and seed-dwelling bacterium that protects plants from diseases.

The research provides clues to better explain how the helpful microbe, Pseudomonas fluorescens Pf-5, naturally safeguards roots and seeds from infection by harmful microbes that cause plant diseases. The genome paper will be published in Nature Biotechnology and was scheduled to be posted online on June 26.

"The genome sequence has helped us identify new chemical pathways that the microbe apparently uses to create what are known as ’secondary metabolites’ – possibly including new antibiotic compounds," says Ian Paulsen. He led the sequencing at The Institute for Genomic Research (TIGR), Rockville, Md., and is the study’s first author.



The use of naturally-occurring, beneficial microbes such as P. fluorescens to control plant pathogens is called "biological control." That method is gaining momentum as a way to grow healthy plants without using synthetic fungicides. In all, about three dozen beneficial microbes are currently used as an environmentally-friendly way to fight plant diseases.

Joyce E. Loper, senior author of the genome paper and an expert on P. fluorescens Pf-5, predicts that the new genomic data will help scientists more quickly develop new ways to boost the effectiveness of beneficial microbes in fighting plant diseases.

"This genomic sequence reveals previously unknown traits of P. fluorescens that increase its potential for biological control," says Loper. She is a plant pathologist with USDA’s Agricultural Research Service (ARS) and is based at Oregon State University, Corvallis. The P. fluorescens genome was sequenced at TIGR and analyzed by scientists there and at ARS and Oregon State University, with contributions by researchers at Rutgers, Washington State University and the University of Arizona. The project was funded by a grant from the USDA’s Cooperative State Research, Education and Extension Service.

The article in Nature Biotechnology presents the first complete genome sequence of a biological control agent for combating plant diseases.

P. fluorescens Pf-5 was discovered two decades ago by Charles R. Howell, a plant pathologist with the ARS in Texas, who showed that the microbe suppressed two major cotton diseases. Since then, plant pathologists around the world have used this strain as a laboratory model to study beneficial microbes.

Paulsen says the P. fluorescens project also pioneered a new methodology. This novel approach relies on the analysis of repeated regions of the DNA sequence to help identify segments of the genome that appear to have been transferred from other microbes or viruses, known as phages, that infect bacteria.

Says Paulsen: "We found exciting evidence that P. fluorescens may have acquired new clusters of genes, called genomic islands, by means of lateral transfer from phages or other microbes."

Robert Koenig | EurekAlert!
Further information:
http://www.tigr.org

More articles from Life Sciences:

nachricht Discovery of a Key Regulatory Gene in Cardiac Valve Formation
24.05.2017 | Universität Basel

nachricht Carcinogenic soot particles from GDI engines
24.05.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

Physicists discover mechanism behind granular capillary effect

24.05.2017 | Physics and Astronomy

Measured for the first time: Direction of light waves changed by quantum effect

24.05.2017 | Physics and Astronomy

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>