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:


(Date:4/11/2017)... , April 11, 2017 NXT-ID, ... security technology company, announces the appointment of independent Directors Mr. ... to its Board of Directors, furthering the company,s corporate ... ... NXT-ID, we look forward to their guidance and benefiting from ...
(Date:4/5/2017)... April 5, 2017  The Allen Institute for Cell ... Explorer: a one-of-a-kind portal and dynamic digital window into ... data, the first application of deep learning to create ... cell lines and a growing suite of powerful tools. ... these and future publicly available resources created and shared ...
(Date:4/5/2017)... LONDON , April 4, 2017 KEY ... is anticipated to expand at a CAGR of 25.76% ... neurodegenerative diseases is the primary factor for the growth ... full report: https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The ... of product, technology, application, and geography. The stem cell ...
Breaking Biology News(10 mins):
(Date:4/27/2017)... WASHINGTON , April 27, 2017  Kinexum, a ... science products, today announces the appointment of Thomas ... G. Alexander ("Zan") Fleming, M.D., Kinexum founder, who becomes ... strategic advisor to Kinexum clients. Thomas ... take on the Kinexum mission and lead the firm,s ...
(Date:4/26/2017)... , ... April 26, 2017 , ... ... demonstrating its new Bioflash MailGuardtm mail security screening solution at the National Postal ... Bioflash MailGuard system provides a fast, highly accurate, easy to use and low ...
(Date:4/25/2017)... ... April 25, 2017 , ... ... supplier of Common Lisp (CL) development tools, and market leader for Semantic ... key performance enhancements now available within the most effective system for developing and ...
(Date:4/25/2017)... WA (PRWEB) , ... April 25, 2017 , ... Leaders ... division of Quorum, will be featured in multiple sessions at this week’s Association ... from emerging trends to best practices in clinical research. , "We are excited to ...
Breaking Biology Technology:
Cached News: