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:1/4/2017)...  CES 2017 – Valencell , the leading ... the launch of two new versions of its ... sensor modules that incorporate the best of Valencell,s ... The two new designs include Benchmark BE2.0, a ... Benchmark BW2.0, a 2-LED version of its original ...
(Date:12/20/2016)... 20, 2016   Valencell , the leading ... STMicroelectronics (NYSE: STM), a global semiconductor leader ... announced today the launch of a new, highly ... that includes ST,s compact SensorTile turnkey ... biometric sensor system. Together, SensorTile and Benchmark deliver ...
(Date:12/15/2016)... and BADEN-BADEN, Germany , December ... leading global financial services provider, today announced an agreement with ... behavioural biometrics, to join forces. The partnership will enable clients ... strategies in compliance with local data protection regulation. ... In order to ...
Breaking Biology News(10 mins):
(Date:1/24/2017)... - BioAmber Inc. (NYSE: BIOA ) announced that, ... the size of the offering by 75% and purchase 3,684,212 ... to purchase 1,842,106 shares of common stock of the Company ... stock (the "Exercise Price"), at a price to the public ... The warrants have a term of four (4) years, exercisable ...
(Date:1/24/2017)... , ... January 24, 2017 , ... ... circumference, and increased serum leptin levels had a positive association with increased prostate ... study published in the International Neurourology Journal involved 571 Korean men who ...
(Date:1/24/2017)... Franklin, MA, USA & Geneva, Switerland (PRWEB) , ... ... ... are pleased to announce the first commercially available malaria Plasmodium falciparum culture panels ... Malaria P. falciparum culture panels, which are available in a range of concentrations ...
(Date:1/24/2017)... , Jan. 24, 2017 /PRNewswire/ - ProMetic Life Sciences ... announced today that its orally active lead drug candidate, ... designation by the UK Medicines and Healthcare Products Regulatory ... A PIM designation is an early ... for the Early Access to Medicines Scheme ("EAMS"), intended ...
Breaking Biology Technology:
Cached News: