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 What happens in the cell nucleus after fertilization
06.12.2016 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt

nachricht Researchers uncover protein-based “cancer signature”
05.12.2016 | Universität Basel

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Speed data for the brain’s navigation system

06.12.2016 | Health and Medicine

What happens in the cell nucleus after fertilization

06.12.2016 | Life Sciences

IHP presents the fastest silicon-based transistor in the world

05.12.2016 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>