Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

For a better understanding of ash dieback: Scientists of the TU Braunschweig discover phytotoxic

20.03.2014

Scientists of the Technical University of Braunschweig made a significant contribution to the understanding of the European Ash dieback by isolating a previously unknown substance from the pathogen and investigating its destructive character. The metabolite proved to have a germination inhibiting effect towards ash and causes necroses in the plant tissue. The results of their studies were published in the current issue of the journal „Angewandte Chemie“.

The pathogen of ash dieback, the fungus Hymenoscyphus pseudoalbidus, was discovered only a few years ago. This fungus currently invades from Asia and causes effects that are visible since almost two decades.


Evidence of the harmful effect of the lactone of germinated seeds

TU Braunschweig

Since the 1990’s a significant part of the ash population in Europe was devastated by the fungus. An important contribution for the revalation of the pathogenicity of this organism was now made by scientists from the Institutes of Organic Chemistry and Microbiology from the TU Braunschweig. 

The German scientists around Dr. Jeroen Dickschat and Dr. Barbara Schulz investigated the largely unknown secondary metabolism of the pathogenic fungus. They discovered a volatile lactone (3,4-dimethylpentan-4-olide) in the headspace of agar plate cultures of the fungus for which they used special equipment for headspace analysis (closed-loop stripping apparatus). The Institute of Organic Chemistry is one of the few institutions that have access to and experience with this method, explains Dr. Dickschat.

Biologists then testet the bioactivity of the volatile lactone against seeds of the ash tree. The lactone exhibited a strong germination inhibition towards ash seeds and caused necroses on the seedlings. By this agressive property, the fungus destroys its own host and habitat, comments Dr. Dickschat. The scientists came to the conclusion that only the European Ash is attacked by the lactone, whereas its Japanese sister species seems to be immune.

„We assume that the phytotoxic lactone plays a main role in the pathogenicity of the fungus“, says Dr. Dickschat, „but there are likely more factors involved that may originate from the plant itself.“ The scientists from Braunschweig hope to lay the ground for further work to understand the pathogenicity mechanisms of H. pseudoalbidus and probably pave the way to a control of the disease.

Publication
C. A. Citron, C. Junker, B. Schulz, J. S. Dickschat, Ein flüchtiges Lacton aus Hymenoscyphus pseudoalbidus, Pathogen des Europäischen Eschensterbens, inhibiert die Keimung seines Wirtes, Angew. Chem. 2014, DOI: 10.1002/ange.201402290.

C. A. Citron, C. Junker, B. Schulz, J. S. Dickschat, A Volatile Lactone of Hymenoscyphus pseudoalbidus, Pathogen of European Ash Dieback, Inhibits Host Germination, Angew. Chem. Int. Ed. 2014, DOI: 10.1002/anie.201402290.

Contact
PD Dr. Jeroen S. Dickschat
Institute of Organic Chemistry
Technical University of Braunschweig
Hagenring 30
D-38106 Braunschweig
Germany
Phone: +49 (531) 391-5264
E-Mail: j.dickschat@tu-bs.de
http://www.oc.tu-bs.de/dickschat

Weitere Informationen:

http://blogs.tu-braunschweig.de/presseinformationen/p=6791

Stephan Nachtigall | idw - Informationsdienst Wissenschaft

Further reports about: Organic fungus metabolism pathogenicity phytotoxic seeds volatile

More articles from Life Sciences:

nachricht More genes are active in high-performance maize
19.01.2018 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht How plants see light
19.01.2018 | Albert-Ludwigs-Universität Freiburg im Breisgau

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Let the good tubes roll

19.01.2018 | Materials Sciences

How cancer metastasis happens: Researchers reveal a key mechanism

19.01.2018 | Health and Medicine

Meteoritic stardust unlocks timing of supernova dust formation

19.01.2018 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>