Navigation Links
Powdery mildew at an evolutionary dead end
Date:12/9/2010

The size of a genome tells us nothing about the comprehensiveness of the genetic information it contains. The genome of powdery mildew, which can destroy entire harvests with its fine fungal threads, is a good example of this. Although the pathogen has almost 120 million base pairs, and therefore one of the largest genomes of the sac fungi, at barely 6,000, its gene count is far lower than that of comparable species. It has lost many of the genes required for separate metabolism found in other fungi. Thus, from a genetic perspective, powdery mildew is stuck in an evolutionary dead end from which it is unable to liberate itself. (Science, December 10, 2010)

Based on the comparison of fungal genomes, Ralph Panstruga from the Max Planck Institute for Plant Breeding Research in Cologne and his colleagues from an international research consortium discovered that powdery mildew forfeited a large part of its genetic complexity in the course of evolution. The considerable size of the mildew genome is largely due to so-called "jumping genes". These genes introduce new sequences into the genome and repeatedly mix up the genetic material by inserting and deleting themselves, causing errors as a result. Due to these changes, the powdery mildew fungus gained a considerable number of new base pairs, but it also lost a lot of genes as their reading frames were interrupted by the insertion of the jumping genes.

As the international consortium of scientists succeeded in demonstrating, the plant pathogen lacks 99 genes that enable independent life, yet are still found in baker's yeast, another sac fungus. Therefore, powdery mildew cannot fix nitrogen, harness energy from alcoholic fermentation or produce certain metabolic products from inorganic compounds. As a parasite, powdery mildew does not require these synthesis processes; it obtains everything it needs from the host plant. Panstruga explains: "It can do without these genes. However, the price
'/>"/>

Contact: Ralph Panstruga
panstrug@mpiz-koeln.mpg.de
49-221-506-2316
Max-Planck-Gesellschaft
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Fertility or powdery mildew resistance?
2. Mildew-resistant and infertile
3. Illuminating biology: An evolutionary perspective
4. Revealing the evolutionary history of threatened sea turtles
5. Details of evolutionary transition from fish to land animals revealed
6. Genetic based human diseases are an ancient evolutionary legacy
7. Flies may reveal evolutionary step to live birth
8. Evolution in action: Our antibodies take evolutionary leaps to fight microbes
9. Scientists uncover evolutionary keys to common birth disorders
10. Evolutionary process more detailed than previously believed, study shows
11. Dinosaur fossils fit perfectly into the evolutionary tree of life
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Powdery mildew at an evolutionary dead end
(Date:4/18/2014)... predicted to reach 9 billion by 2050 will ... human-altered landscapes such as farmland, according to Stanford ... supports it might be an increasingly scarce commodity ... the land surface is directly affected by humans ... such as climate change. But what if altered ...
(Date:4/18/2014)... comet impacts can cause widespread ecological havoc, killing off ... But new research from Brown University shows that impacts ... the time of an impact. , A research team ... of leaves and preserved organic compounds lodged inside glass ... material could provide a snapshot of environmental conditions at ...
(Date:4/17/2014)... , Respiratory syncytial virus (RSV) is a ... life-threating illness in very young and elderly populations. ... enters host cells through the fusion protein RSV ... interfering peptides that prevent bundle formation limit RSV ... susceptible to degradation. In this issue of the ...
Breaking Biology News(10 mins):Stanford researchers rethink 'natural' habitat for wildlife 2Stanford researchers rethink 'natural' habitat for wildlife 3Stanford researchers rethink 'natural' habitat for wildlife 4Impact glass stores biodata for millions of years 2Impact glass stores biodata for millions of years 3JCI online ahead of print table of contents for April 17, 2014 2JCI online ahead of print table of contents for April 17, 2014 3JCI online ahead of print table of contents for April 17, 2014 4JCI online ahead of print table of contents for April 17, 2014 5JCI online ahead of print table of contents for April 17, 2014 6
... cholera that has sickened thousands in Haiti came from a ... over the past three years as some have thought, according ... online open-access journal of the American Society for Microbiology. ... earlier findings that indicate Vibrio cholerae bacteria were ...
... 2013 New materials and potential new drug targets are ... major scientific meeting on the structure of molecules. More information ... in mid-July. The Annual Meeting of the American Crystallographic ... at the Sheraton Waikiki Beach Hotel in Honolulu, Hawaii. Crystallography ...
... The Fondation Leducq in Paris, France, dedicated to improving ... awarded a $6 million grant award to a new ... researchers from the Cardiovascular Research Center at Icahn School ... large grant was awarded as part of the Fondation ...
Cached Biology News:Genomes of cholera bacteria from Haiti confirm epidemic originated from single source 2Genomes of cholera bacteria from Haiti confirm epidemic originated from single source 3New materials, progress toward an HIV vaccine, and more at meeting of crystallographers 2New materials, progress toward an HIV vaccine, and more at meeting of crystallographers 3Fondation Leducq awards $6 million grant for global research network for cardiac regeneration 2Fondation Leducq awards $6 million grant for global research network for cardiac regeneration 3
(Date:1/15/2014)... 15, 2014 AudioNotch is the internet's ... for the treatment of tinnitus. Patients listen to sound ... over a period of weeks to months, their tinnitus volume ... two forms: Notched Music and Notched White Noise. Now, AudioNotch ...
(Date:1/14/2014)... , Jan. 14, 2014  3D Communications, a leading provider of ... regulatory, business, and media events in the United States ... former associate Virginia Cox , JD, is returning to the ... Virginia Cox re-joins 3D after more than two years of ...
(Date:1/14/2014)... iLab Solutions, the leader in core facility management ... Product Strategy. In this role, Michelle will work with current ... in the development of iLab products. Her main goal will ... to the scientific community by offering the most advanced, user-friendly, ...
(Date:1/14/2014)... 13, 2014 Bob Hainsey, a semiconductor ... 20 years in the industry, has joined SPIE, ... will serve as the society’s Science and Technology Strategist. ... SPIE as our Technology Strategist, further strengthening the technical ...
Breaking Biology Technology:Former FDA Associate Commissioner Returns To 3D Communications 2iLab Solutions Announces Michelle Detwiler as the New Director of Product Strategy 2Photonics R&D Leader Bob Hainsey Joins SPIE Technical Staff 2
... the impact of one of the fastest growing eye diseases on ... provide physicians with a virtual experience of having neovascular (wet) age-related ... ... January 29, 2009 -- To help eye specialists better understand the ...
... a leader in renewable energy and biofuels development and production, today announced ... of the Board of Directors. , ... Los Angeles (PRWEB) January 29, ... and production, today announced the appointment of David Pyrce as its Chief ...
... CHADDS FORD, Pa., Jan. 28 Endo Pharmaceuticals Inc. ... quarter and 2008 full-year financial results on February 27, ... webcast at 10:30 a.m. ET that day to discuss ... Executive Officer, Nancy J. Wysenski, Chief Operating Officer and ...
Cached Biology Technology:Looking at AMD Through Patients' Eyes: Viscira Virtual Exhibit Educates Physicians by Personalizing Serious Eye Disease 2Looking at AMD Through Patients' Eyes: Viscira Virtual Exhibit Educates Physicians by Personalizing Serious Eye Disease 3Nexsun Corp Names Industry Executive David Pyrce as Chief Executive Officer 2Endo Pharmaceuticals to Announce Fourth Quarter and 2008 Full-Year Financial Results on February 27, 2009 2
Human HVEM/TNFRSF14 Allophycocyanin MAb (Clone 94801)...
Enodgenous alkaline phosphotase inhibitor. Levamisole solution is supplied in concentrated form (20x). The final concentration of levamisole in the substrate solution will be 1 mM....
X-gal,1g...
...
Biology Products: