Navigation Links
Host change alters toxic cocktail
Date:3/11/2011

This release is available in German.

Leaf beetles fascinate us because of their amazing variety of shapes and rich coloring. Their larvae, however, are dangerous plant pests. Larvae of the leaf beetle Chrysomela lapponica attack two different tree species: willow and birch. To fend off predator attacks, the beetle larvae produce toxic butyric acid esters or salicylaldehyde, whose precursors they ingest with their leafy food. Scientists of the Max Planck Institute for Chemical Ecology in Jena, Germany, now found that a fundamental change in the genome has emerged in beetles that have specialized on birch: The activity of the salicylaldehyde producing enzyme salicyl alcohol oxidase (SAO) is missing in these populations, whereas it is present in willow feeders. For birch beetles the loss of this enzyme and hereby the loss of salicylaldehyde is advantageous: the enzyme is not needed anymore because its substrate salicyl alcohol is only present in willow leaves, but not in birch. Birch beetles can therefore save resources instead of costly producing the enzyme. First and foremost, however, the loss of salicylaldehyde also means that birch feeding populations do not betray themselves to their own enemies anymore, who can trace them because of the odorous substance. (PNAS Early Edition, DOI 10.1073/pnas.1013846108)

Defensive glands and toxic cocktails

Beetle larvae are part of a food chain. They are attacked by predatory insects and parasites, such as hover flies and bugs, as well as infested by bacteria and fungi. To protect themselves some leaf beetle larvae have developed interesting defense mechanisms, which function externally and metabolically: In case of danger, they emit substances from their defensive glands in form of vesicles (see picture; a short video is also available on http://
'/>"/>

Contact: Wilhelm Boland
boland@ice.mpg.de
49-364-157-1200
Max Planck Institute for Chemical Ecology
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Pathology study tracks uterine changes with mifepristone
2. Mapping human vulnerability to climate change
3. Virginia Tech shares in grant to study effects of climate change on southern pine forests
4. Examining climate change effects on wheat
5. Climate change affecting food safety
6. NIFA announces grants to study the effects of climate change on agricultural and forest production
7. Invasive plants can create positive ecological change
8. Cross-border conservation vital to protect birds in a climate-change world
9. Wolverines threatened by climate change, earlier springs
10. Wolverine population threatened by climate change
11. Island-scale study reveals climate-change effects
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Host change alters toxic cocktail
(Date:7/28/2014)... the U.S. Food and Drug Administration (FDA) for other ... pathogens inside human cells, including those that cause Legionnaires, ... in mBio , the online open-access journal of ... of identifying non-antibiotic drugs that could one day help ... on the list inhibit the growth of at least ...
(Date:7/28/2014)... States have a circulatory problem of the legs called ... even require surgery in serious cases. This disease can ... limb amputation. , At The University of Texas Health ... a non-surgical preventative treatment in a mouse model of ... circulation. Their proof-of-concept study appears in the journal ...
(Date:7/28/2014)... rat brain cells suggests that the effects of a ... cells are temporary. , The study, published in this ... was conducted by biologists at the University of California, ... York in response to concerns, arising from multiple studies ... to general anesthetics may increase their susceptibility to long-term ...
Breaking Biology News(10 mins):New route to identify drugs that can fight bacterial infections 2Scientists discover genetic switch that can prevent peripheral vascular disease in mice 2Study suggests disruptive effects of anesthesia on brain cell connections are temporary 2Study suggests disruptive effects of anesthesia on brain cell connections are temporary 3
... genomics initiative ever undertaken an international effort to ... Earth will be officially activated this week. , ... launched by the Minister of Research and Innovation, Glen ... Saturday, September 25 at 6:30 p.m. , By enabling ...
... Contrary to a thousand face cream adverts, the secret of ... Dr. Carlos Herrera, a Professor of Research at the Consejo ... the withering action of flowers may have evolved to protect ... issue of the Annals of Botany ( http://dx.doi.org/10.1093/aob/mcq160 ...
... objects in a new computer program designed to give people ... thought the ease of the using the program,s automatic mode ... many participants in a pilot study didn,t like it because ... mode, which requires them to think several steps ahead and ...
Cached Biology News:Building a digital library for life on Earth 2Robotic arm's big flaw: Patients say it's 'too easy' 2
(Date:7/29/2014)... , July 29, 2014  ImmunoClin Corporation ... personalized medicine, treatment of infectious diseases as well ... prognosis and prevention of pathologies like cardiovascular disease, ... 1, 2014, ImmunoClin Corporation will complete the strategic ... Washington, D.C. , a key center of ...
(Date:7/29/2014)...  Sigma-Aldrich Corporation (NASDAQ: SIAL ) dramatically ... investment in Green Chemistry and donated more than 8,000 ... the Company announced Monday in its new 2013 ... The report comes in a year ... responsible corporate citizen, including recognition for the second consecutive ...
(Date:7/29/2014)... The first product launch from start-up Hurley ... robotics. What sets Droidles completely apart from other stand ... them to communicate, share code with each other and ... “The invention is the system,” said Hurley Research founder ... of their own, both physically and on the internet." ...
(Date:7/29/2014)... Acres, FL (PRWEB) July 29, 2014 ... ex situ lift out specimen preparation solutions, has been ... Trademark Office for specimen manipulation methods incorporating a unique ... 8,740,209. This is the second company patent for ... A. Giannuzzi. , These complementary patents extend ...
Breaking Biology Technology:ImmunoClin Corporation (IMCL) Relocates Corporate Headquarters to Washington, DC 2ImmunoClin Corporation (IMCL) Relocates Corporate Headquarters to Washington, DC 3Sigma-Aldrich Achieves Record Success in Environmental, Community Initiatives 2Sigma-Aldrich Achieves Record Success in Environmental, Community Initiatives 3Droidles, the Social Network of Robots and Open Source Platform for the Internet of Things, Launches for Crowd Funding on IndieGoGo.com 2EXpressLO LLC Granted Second U.S. Patent for Innovative Specimen Preparation Methods 2
... Research Foundation has licensed the California immunological research ... WARF's stem cell patents, Chemicon's parent company Serologicals ... to WARF's portfolio of stem cell technologies, which were ... . , ,Jeff Linton, president of Chemicon, said ...
... Platypus Technologies of suburban Madison has received ... for $200,000 from the National Cancer Institute. The grant ... rapid quantification of protein activity, useful for cancer research. ... II SBIR grant for $2.14 million from the National ...
... Customer Potential Management , a developer of databases and ... management solution has been implemented at the Michigan hospital ... the CRM solution to promote its collaboration with the ... with oncologists from both hospitals. While market research said ...
Cached Biology Technology:WARF signs stem cell agreement with California firm 2
... This CLS number is a ... easily match Cornings product number. ... please order under the old ... customer service for assistance. ...
... Maximize the value of your microarray data ... support you need from consultation to extensive ... date methods. Utilize our expertise in combination ... from your own microarray experiments., ,Normalization and ...
BD Falcon 850 cm Smooth-surface TufRol Roller Bottle, tissue-culture treated polystyrene, blow-molded one-piece design, with easy on/off non-vented cap. (2/sp, 20/ca) Packaging: 2 / pack, 20 /...
... of Flight Mass Analyzer for superior sensitivity, mass accuracy, and resolving ... m/z, * Precursor ion selection range: 150 - 4000 m/z, * ... with internal reference, * Dynamic range: 4 orders of magnitude ... ...
Biology Products: