Navigation Links
Lethal backfire: Green odor with fatal consequences for voracious caterpillars
Date:8/26/2010

s, so-called isomerases. "We supposed that the increased occurrence of (E)-2-hexenal may attract the carnivores, because we always discovered Geocoris when young Manduca larvae had just hatched and started feeding on the tobacco leaves," says Ian Baldwin.

To test this assumption, the researchers started a series of experiments using Manduca sexta eggs and different blends of (Z)-3-hexenal and (E)-2-hexenal. The eggs were glued to tobacco plants growing in the field and different mixtures of odorant signals were applied to adjacently located cotton swabs. After 12 and 24 hours, the fate of eggs on the leaves was determined. The result: Plants that had been perfumed with the Z-lure had only 8% of their glued eggs attacked, whereas plants perfumed with the E-lure had lost 24% of the eggs. And the eggs had been eaten by Geocoris. The speed of plants' defense triggering was particularly impressive: it takes less than an hour to trigger the conversion of the Z-lure to the E-lure and less than 24 hours for the predation of the eggs. "Other indirect defense mechanisms of plants require the activation of new metabolic pathways for the release of odorant signals, and these responses are much slower," says Ian Baldwin. The release of (E)-2-hexenal after its rapid and simple conversion from (Z)-3-hexenal is so rapid that it provides the prey-searching predator with enough information to pinpoint the exact location of the feeding herbivore on a plant. And it is this information which makes the release of volatile "alarm calls" an effective defense strategy for plants.

But which substance is betraying the caterpillar? "The simplest assumption is that the larval oral secretions contain a special enzyme, probably an isomerase, which rearranges the Z:E ratio of the aldehyde in favor of (E)-2-hexenal," says Silke Allmann. To test this assumption, the oral secretion was briefly heated and subsequently applied on wounded leaves. (E)-2-hexenal was now no longer produc
'/>"/>

Contact: Ian T. Baldwin
baldwin@ice.mpg.de
49-017-518-04226
Max Planck Institute for Chemical Ecology
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Nature Medicine study shows Peregrines bavituximab can cure lethal virus infections
2. Diabetes drug shows promise in fighting lethal cancer complication
3. UCF professors vaccine could be lethal weapon against malaria, cholera
4. Researchers discover genetic differences between lethal and treatable forms of leukemia
5. Even at sublethal levels, pesticides may slow the recovery of wild salmon populations
6. Synthetic lethality: A new way to kill cancer cells
7. Study: Gene therapy reverses effects of lethal childhood muscle disorder in mice
8. Colonies of bacteria fight for resources with lethal protein
9. Pitt researchers discover big role for microRNA in lethal lung fibrosis
10. The kiss of death: Research targets lethal disease spread by insect that bites lips
11. Experimental treatment protects monkeys from lethal Ebola virus post-exposure
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Lethal backfire: Green odor with fatal consequences for voracious caterpillars
(Date:12/10/2014)... SUNNYVALE, California , December 9, 2014 /PRNewswire/ ... Integrate with ITN,s BCARD Platform ... secure, cloud-based enterprise meeting scheduling solutions for business-to-business ... International, the world leader in mobile near-field communication ... solutions.      (Logo: http://photos.prnewswire.com/prnh/20140612/691055) , ...
(Date:12/4/2014)... GARDENS, Fla. , Dec. 3, 2014 /PRNewswire/ ... solutions, today announced that its DigitalPersona ® ... fingerprint readers have been deployed throughout First Bank ... , South Carolina and ... in Southern Pines, North Carolina ...
(Date:11/21/2014)... , November 18, 2014 ... Systems Market by Systems (Video, RFID, Access Control, Intrusion ... Factories, Hotels, Banks, Government), Component Service Geography - Global ... Systems Market is projected to be around $25 Billion ... by 2020, growing at a CAGR of 8.69%. ...
Breaking Biology News(10 mins):Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 2Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 3First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3Industrial Security Systems Market Worth $38 Billion by 2020 2Industrial Security Systems Market Worth $38 Billion by 2020 3
... the world's oceans are severely threatened by over-fishing and ... fishes' long lifespans and low reproductive success, a panel ... the American Association of the Advancement of Science. Some ... 500 meters take decades to reach breeding maturity, so ...
... to knock out a specific protein that protects cancer cells ... suggest that a drug that can block this "survival protein" ... , But such a drug used in combination with several ... drug-resistant forms of chronic lymphocytic leukemia (CLL) and acute lymphoblastic ...
... patients in Uganda who self-paid for their antiretroviral medications ... demands or supply logistical disruptions. These treatment interruptions ... in patients. , These findings by a team led ... University, Kampala, and UCSF are reported in the April ...
Cached Biology News:Long-lived deep-sea fishes imperiled by technology, overfishing 2Long-lived deep-sea fishes imperiled by technology, overfishing 3Knocking out survival protein could aid leukemia treatment 2Resistance to anti-HIV drugs in Uganda developed due to drug supply problems 2
(Date:12/19/2014)... Charm Sciences is pleased to announce ... of Aflatoxin M1 in raw commingled milk is the ... validation. The peer reviewed report of the validation by ... Agricultural and Fisheries Research (ILVO-T&V) has been published by ... the most toxic aflatoxin and a known carcinogen, can ...
(Date:12/19/2014)... Naurex Inc., a biopharmaceutical company leveraging its ... the central nervous system, today announced that Norbert ... present at the 33 rd annual J.P. Morgan ... 3:00 p.m. PST on Tuesday, January 13, 2015, at ... Calif. About Naurex Inc. ...
(Date:12/19/2014)... , Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... today that they have been acquired by Roche (SIX: ... a privately held company that provides a big data ... sequencing (NGS) data for the academic and translational research ... Unit, and will continue to focus on development of ...
(Date:12/19/2014)... --Research and Markets ( http://www.researchandmarkets.com/research/fhh9rj/technology ) ... Innovations in Smart Fabrics (Technical Insights)" report ... http://photos.prnewswire.com/prnh/20130307/600769 The Research Service titled ... assessment on technological advancements and market for Smart ... 1. The Smart Fabrics market is expected to ...
Breaking Biology Technology:Charm Sciences Achieves Independent Validation of First 15 Minute Quantitative Screening Method for Aflatoxin M1 2Naurex to Present at 33rd Annual J.P. Morgan Healthcare Conference 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3Technology Innovations in Smart Fabrics (Technical Insights) 2
... from Thomson Reuters released today shows that the US is no ... kept pace with the increased output from European and Asia-Pacific nations. ... found that research output from the US has been surpassed by ... 40 percent of research papers in the most influential journals(1). By ...
... [Brown University] The website of the Nobel Prize ... fictitious, the image captures the excitement around graphene, which, ... and strongest materials ever produced. A significant obstacle ... large enough to support a theoretical sleeping cat. For ...
... This release is available in German ... and smaller, with microelectronic components gradually being replaced ... is at the present stage the most commonly ... limit, preventing further miniaturization and technological progress. New ...
Cached Biology Technology:US Dominance in Scientific Research Significantly Challenged by Increased Competition from Europe and Asia, According to Thomson Reuters Study 2Graphene's strength lies in its defects 2Step by step toward tomorrow's nanomaterial 2
Human PLUNC MAb (Clone 252512)...
BOND ELUT MATRIX-C18, 25 mg ...
Human FADD Affinity Purified Polyclonal Ab...
Immunogen: Synthetic peptide based on the sequence: SPSSGPSLTADSMWR Storage: -20 C, Avoid Freeze/Thaw Cycles...
Biology Products: