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:7/24/2014)... experts gathered at NJIT this week for an all-day ... U.S. Environmental Protection Agency (EPA) to dredge toxic sediment ... , The EPA has called the plan, which proposes ... capping sections of the riverbed, one of the largest ... be dredged and disposed off-site. , "We need to ...
(Date:7/24/2014)... into the potato genes that best adapt to the ... rainfall and increased extremes of hot and cold temperatures.The ... order to create new potato varieties that will adapt ... to find out how the current potato varieties will ... and lower temperatures. , This research is part of ...
(Date:7/24/2014)... on his work with a new drug that successfully treated ... Houston has received a $250,000 grant to expand his research ... to treat a wider range of autoimmune diseases., Chandra Mohan, ... Engineering at UH, previously published a study in Arthritis Research ... successfully treated lupus in mice and reduced the number of ...
Breaking Biology News(10 mins):Experts Weigh the Pros and Cons of a $1.7 Billion EPA Cleanup Plan for the Passaic River at an NJIT 2Neiker-Tecnalia is researching the potato genes that best adapt to climate change 2Biomedical engineer looks at new applications for novel lupus drug 2Biomedical engineer looks at new applications for novel lupus drug 3
(Date:7/24/2014)... Research and Markets has announced ... 2014-2018" report to their offering.  ... the in vitro growth of plant or animal cells ... biopharmaceutical production. Cell culture is a crucial step in ... cell culture consumables are necessary for the in vitro ...
(Date:7/24/2014)... 2014 SRI International has been awarded a ... of Allergy and Infectious Diseases (NIAID), part of the ... potential therapies for HIV infection and AIDS. The contract ... AIDS and the complications and opportunistic infections associated with ... transmission of HIV. According to the ...
(Date:7/24/2014)... Texas (PRWEB) July 24, 2014 ... Potassium Sulphate Industry” is a professional and in-depth ... report introduces Potassium Sulphate basic information, including ... and industry overview. This research covers the international ... as global industry analysis covering macroeconomic environment & ...
(Date:7/24/2014)... (PRWEB) July 24, 2014 1000 balances ... takes input on customers’ weighing needs and expertly narrows ... shortlist of balances, scales or even terminals. , ... and smallest weight (or select readability instead) and define ... few additional selection criteria narrows down the list to ...
Breaking Biology Technology:Global Cell Culture Market 2014-2018: Key Vendors are Becton, Dickinson and Co, EMD, GE Healthcare, Lonza Group, Sigma Aldrich and Thermo Fisher Scientific 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 3Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 2Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 3Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 4
Cached News: