Navigation Links
Milkweed's evolutionary approach to caterpillars: Counter appetite with fast repair
Date:7/22/2008

The adage that your enemies know your weaknesses best is especially true in the case of plants and predators that have co-evolved: As the predators evolve new strategies for attack, plants counter with their own unique defenses.

Milkweed is the latest example of this response, according to Cornell research suggesting that plant may be shifting away from elaborate defenses against specialized caterpillars toward a more energy-efficient approach. Genetic analysis reveals an evolutionary trend for milkweed plants away from resisting predators to putting more effort into repairing themselves faster than caterpillars -- particularly the monarch butterfly caterpillar -- can eat them.

"An important question with co-evolution is where does it end?" said Anurag Agrawal, Cornell associate professor of ecology and evolutionary biology and lead author of a paper in the current issue of the Proceedings of the National Academy of Sciences. "One answer is when it becomes too costly. Some plants seem to have shifted away from resisting herbivory [plant eating] and have taken that same energy and used it to repair themselves."

The paper is important because it sheds light on key theories of co-evolution, claiming that pressure by foraging insects makes plants diversify as they evolve new defensive strategies and that such diversification follows trends in one direction or another, said Agrawal.

Milkweed species have evolved elaborate resistance strategies to fight off caterpillars that eat their leaves. These include hairs on their leaves, heart poisons called cardenolides in their tissues and milky-white toxic latex that pours from the plants' tubes. A caterpillar's bite into a milkweed leaf leads to a flood of latex that is "like getting a gallon of sticky paint thrown into your face," said Agrawal.

Some caterpillars, in turn, have adapted by shaving the leaf, cutting a leaf's veins in a circle and then eating in the middl
'/>"/>

Contact: Blaine Friedlander
bpf2@cornell.edu
607-254-8093
Cornell University Communications
Source:Eurekalert

Page: 1 2

Related biology news :

1. Revolutionary chefs? Not likely, shows physics research
2. Crossed (evolutionary) signals?
3. Mechanism and function of humor identified by new evolutionary theory
4. Revolutionary CO2 maps zoom in on greenhouse gas sources
5. M2SYS Introduces Revolutionary Biometric Artificial Intelligence Technology to Significantly Reduce Fingerprint Software False Reject Rates
6. Lemurs evolutionary history may shed light on our own
7. Dartmouth researchers find the root of the evolutionary emergence of vertebrates
8. Oldest Australian crayfish fossils provide missing evolutionary link
9. New book reveals an evolutionary journey of the human body
10. Scientists find missing evolutionary link using tiny fungus crystal
11. Primitive early relative of armadillos helps rewrite evolutionary family tree
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/30/2015)... , June 30, 2015 To bolster its efforts ... HYPR Corp. announced today the addition of two new team ... as board advisor and David Raviv will act ... underscore HYPR Corp.,s commitment to providing the most secure solutions ... Sirota co-founded Layer 7 Technologies, a provider of security ...
(Date:6/26/2015)... SPRINGVILLE, Utah , June 26, 2015 ATL ... assemblies and devices with specialties in single use solutions, headquartered ... acquisition of MedConx, Inc. (a California ... , and San Jose, Costa Rica ). ... Costa Rica with ATL Technology,s existing ...
(Date:6/25/2015)...  TAKE Solutions Ltd., a global business technology solutions ... Patent and Trademark Office (USPTO) for its "Method for ... Clinical Accelerators to reduce the time taken to standardize ... without the accelerators), thus reducing time to market. ... the heart of the patented Clinical Data Standardization Process ...
Breaking Biology News(10 mins):HYPR Corp. Expands Biometric Authentication Team with Enterprise All Stars 2HYPR Corp. Expands Biometric Authentication Team with Enterprise All Stars 3ATL Technology Announces Acquisition of MedConx, Inc. and Expanded Global Footprint 2TAKE Solutions Awarded Patent By USPTO 2
... menace stalks the loons, gulls and other water birds of ... caused when birds eat fish infected with toxin-producing bacteria. Cases ... more waterfowl in 2007 than when it was first reported ... ocean engineers from the Florida Atlantic University (FAU) Institute for ...
... State University allows scientists to zoom in on the ... scientists to see the structure of microorganisms, cells, metals, ... light microscopes. But while these images have allowed scientists ... function could only be estimated because of static images. ...
... engineering and bioengineering who joined the Erik Jonsson School ... recipient of a $2.3 million grant from the National ... control theory and physical rehabilitation to revolutionize and improve ... American Society of Mechanical Engineers report ,2028 Vision for ...
Cached Biology News:Great lakes waterfowl die-offs: Finding the source 2New microscope captures movements of atoms and molecules 2UT Dallas professor wins $2.3 million NIH award 2UT Dallas professor wins $2.3 million NIH award 3
(Date:7/28/2015)... 2015  Faced with increasing challenges such as ... than symptomatic, the global healthcare industry today is ... of curing or significantly changing the course of ... towards regenerative medicine as a viable alternative. ... human health with the potential to resolve unmet ...
(Date:7/27/2015)... , ... July 27, 2015 , ... Production of high ... the past few years in the EU. For instance, it surpassed the EUR 106 ... 92 million mark in 2010. Germany is a major producer, while Italy is a ...
(Date:7/27/2015)... -- According to the new Market Research Report ... by Application (Biobanking, Regenerative Medicine, Drug Discovery), by Geography ( ... Asia-Pacific , Rest of the World) - ... was valued at $247.7 million in 2014, which is estimated ... CAGR of 18.2% between 2014 and 2019. Browse ...
(Date:7/26/2015)... Cumberland, Maine (PRWEB) , ... July 26, 2015 ... ... the release of its VALIDATE® ANEMIA calibration verification / linearity test kit. The ... matrix. Each VALIDATE® ANEMIA kit is prepared using the CLSI recommended “equal ...
Breaking Biology Technology:Stem Cell Therapy to Redefine Regenerative Medicine, says Frost & Sullivan 2Stem Cell Therapy to Redefine Regenerative Medicine, says Frost & Sullivan 3Stem Cell Therapy to Redefine Regenerative Medicine, says Frost & Sullivan 4Stem Cell Therapy to Redefine Regenerative Medicine, says Frost & Sullivan 5High Tenacity Filament Yarn of Viscose Rayon Consumption to Grow Swiftly in the EU, Forecasts BAC Reports in New Study Available at MarketPublishers.com 2Global Biopreservation Media Market to be Worth $571.5 Million by 2019 2Global Biopreservation Media Market to be Worth $571.5 Million by 2019 3Maine Standards Company, LLC Announces Release of VALIDATE® ANEMIA Calibration Verification / Linearity Test Kit 2
... DIEGO, Jan. 29 BioMed Realty Trust, Inc.,(NYSE: BMR ... quarter,and year ended December 31, 2007 after the market closes ... Chief Executive Officer, and Kent Griffin,Chief Financial Officer, will host ... February 29, 2008 to discuss the company,s,financial results and operations ...
... Jan. 29 QED International Associates, Inc,administrator ... 20 underlying,indexes for the HealthShares(TM) Exchange-Traded Funds, ... trading on Thursday January 31, 2008 KV,Pharmaceutical ... (Nasdaq: ARXT ) in the HealthShares(TM) ...
... to be Highlighted at Molecular Imaging Conference, ... Inc., (OTC Bulletin Board: IMDS) a pioneer in ... 2008, January 28 - 31,2008, in Dubai, United ... CD89., (Logo: http://www.newscom.com/cgi-bin/prnh/20040412/IMDSLOGO ), ...
Cached Biology Technology:BioMed Realty Trust To Report 2007 Fourth Quarter and Year-End Results 2QED International Associates Announces Changes to the HealthShares(TM) Composite and HealthShares(TM) Respiratory/Pulmonary Indexes 2Imaging Diagnostic Systems Exhibits at Major Middle East Health Conference 2Imaging Diagnostic Systems Exhibits at Major Middle East Health Conference 3
RayBio L Series 507: RayBio Label-based Antibody Array I (2 membranes) Class: Antibody Array Products Product Group: Antibody Array...
... template DNA, primers, salts or other unwanted ... proved critical for both standard and capillary ... with dye terminator cycle sequencing chemistries such ... uniformity of the magnetic paeticles guarantees consistent ...
Human HVEM/TNFRSF14 Allophycocyanin MAb (Clone 94801)...
Mature rat whole blood (Sprague-Dawley, averaging 7-8 weeks of age, either sex) is collected at the time of slaughter and processed within 45 minutes. It is then filtered through gauze, pooled in an ...
Biology Products: