HOME >> BIOLOGY >> NEWS
Signal chemical primes plants for pest attack

Physically damaged or chewed plants produce a volatile chemical that may serve as a primer to prepare nearby plants to defend themselves against insect attack, according to a team of researchers.

"We know that when caterpillars chew on plants, eventually the plants produce chemicals attracting wasps that are the natural enemy of the caterpillar," says Dr. James H. Tumlinson, the Ralph O. Mumma endowed professor of entomology at Penn State. "Natural predators can be an effective method of biological control of pests in agriculture."

However, these predator attracting chemicals do not appear immediately. The first chemicals released are green leafy volatiles (GLV), the odor of new mown grass or crushed leaves. These are highly volatile and appear immediately so they are good candidates as signals to other plants.

To explore this, Tumlinson, working at the Center for Medical, Agricultural and Veterinary Entomology, Agricultural Research Service, U.S. Department of Agriculture, Gainesville, Fl., looked at how GLV influenced undamaged plants in the area by studying corn seedlings and beet army worm, a caterpillar that eats corn leaves as well as cotton, tobacco and other plants. The researchers exposed seedlings to GLV for an hour or overnight. They then tested the undamaged plants by either mechanically damaging them or mechanically damaging them and applying beet armyworm spit to the wounds.

"We discovered that . . . exposure to GLV primed corn plant defenses to respond more strongly against subsequent attack by herbivorous insects by increasing jasmonic acid biosynthesis and volatile organic compounds (VOC)," the researchers report in the current issue of the Proceedings of the National Academy of Science.

Jasmonic acid is a plant hormone that turns on plant defenses, including VOCs, which are the chemicals that attract the caterpillar's parasites and predators. They usually do not appear until hours after the init
'"/>

Contact: A'ndrea Elyse Messer
aem1@psu.edu
814-865-9481
Penn State
26-Jan-2004


Page: 1 2 3

Related biology news :

1. Epilepsy: Signals brake in brain impaired
2. Reproductive Signals Affect Lifespan In Roundworm C. Elegans, Offering Possible Insight Into Human Aging Process
3. A Versatile Signal In Vertebrate Embryogenesis: Wnt-4 Regulates Kidney Development, Sex Organ Differentiation, Neuronal Survival And Axonal Guidance
4. Small G-Proteins Make A Big Difference -- Nerve Cell Signalling Is Regulated By Arf-GTPases And Their Activators
5. How Nerve Cells Get In Touch - A Molecular Model Of Synapse Formation And Retrograde Signalling In The Brain
6. Cell Suicide Prevented By Survival Signals
7. Plant-Based Fat Inhibits Cancer-Cell Growth By Enhancing Cells Signaling System, UB Researchers Show
8. Toxic Protein That Interferes With Brain Signals May Trigger Onset Of Alzheimers Disease
9. R-Type Channels - A New Type Of Calcium Channels Controlling Signal Transduction Between Neurons In The Brain
10. Cholesterol Anchor Helps Signaling Proteins Direct Development
11. DNA lends scientists a hand, revealing new chemical reactions

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Signal chemical primes plants for pest attack

(Date:4/27/2015)... April 27, 2015  For more than four decades, ... has been the premier worldwide event for the unmanned ... a must-attend event for any local, national, or trade ... emerging commercial markets and current applications of unmanned technologies. ... this projected $48 billion industry, and how it will ...
(Date:4/27/2015)... 2015 NXT-ID, Inc. (NASDAQ: NXTD ) ... on the growing mobile commerce market, announces that its ... the first week of May, 2015 and will be ... Gino Pereira , Chief Executive ... company as Wocket® enters the consumer market. We would ...
(Date:4/27/2015)... Apr. 27, 2015 Profile Solutions, Inc. (OTC: ... security systems is pleased to announce that Dr ... consultant and member of its scientific advisory board. ... as a thought leader in technology-enhanced learning models. He ... and has published studies and books focused on online ...
Breaking Biology News(10 mins):UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 2UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 3UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 4UNMANNED SYSTEMS 2015: Largest International Conference and Trade Show for the Drone and Unmanned Technology Industry 5Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 3Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 2Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 3Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 4
(Date:4/28/2015)... Boston, MA (PRWEB) April 28, 2015 ... the science of the little-known and incurable disease, ... awarded $485,840 in grants to new projects in the ... and children around the world. , The FSH Society’s ... proposals for the grants. They awarded monies to projects ...
(Date:4/28/2015)... (PRWEB) April 28, 2015 CargoSense, ... company focused on supply chain logistics, today announced ... its seed round, bringing total investment proceeds to ... early stage venture capital firms IrishAngels and Middleburg ... Innovative Technology, also participated in the round. ...
(Date:4/28/2015)... April 28, 2015 Pittcon ... the upcoming Labroots virtual event, Genetics ... The theme of this conference is a ... as RNAi, Next-generation sequencing, cancer research, sequencing, ... genomic medicine, human Genome structural variation, pharmacogenetics, ...
(Date:4/28/2015)... Showcasing continued leadership in the direct ... that provides scientifically advanced, age-defying products, has been ... Association (DSA) by the DSA Board of Directors. ... the DSA confirmed that Nerium’s business practices are ... association: to ensure that direct sales consumers and ...
Breaking Biology Technology:FSH Society Awards $485,000 in Grants for Research Dedicated to FSH Muscular Dystrophy 2FSH Society Awards $485,000 in Grants for Research Dedicated to FSH Muscular Dystrophy 3FSH Society Awards $485,000 in Grants for Research Dedicated to FSH Muscular Dystrophy 4CargoSense Completes Seed Round Offering By Raising $2.5 Million 2CargoSense Completes Seed Round Offering By Raising $2.5 Million 3CargoSense Completes Seed Round Offering By Raising $2.5 Million 4Pittcon Announces Plans to Exhibit at the Annual Labroots Genetics and Genomics Virtual Event 2Pittcon Announces Plans to Exhibit at the Annual Labroots Genetics and Genomics Virtual Event 3Nerium International Receives Direct Selling Association Membership 2Nerium International Receives Direct Selling Association Membership 3
Cached News: