HOME >> BIOLOGY >> NEWS
Caterpillar saliva beats plant defenses

A common substance produced by fungi and other organisms has been found in the saliva of caterpillars and helps to suppress the toxins that plants produce when chewed on by insects, according to a team of entomologists. "The saliva of herbivorous insects has been overlooked as a factor in overcoming host defenses," the researchers report in today's issue of Nature. "Our results show that glucose oxidase, one of the principal components of Helicoverpa Zea saliva, is responsible for suppressing induced resistance in (tobacco)." Investigation of the caterpillar commonly known as corn earworm by a team of Penn State and University of Arkansas entomologists aimed at isolating the substance in caterpillar saliva that suppressed expression of defensive mechanisms in leaves. These defensive mechanisms include production of nicotine -- a neural toxin, and digestive protease inhibitors -- which interfere with caterpillar digestion. "Initially it was thought that caterpillar saliva contained only compounds that triggered the plant's defense mechanisms," says Dr. Gary W. Felton, head and professor of entomology at Penn State. "Rather than inducing defense mechanisms as we supposed, the saliva inhibits production of the harmful chemicals and actually weakens the defenses of the plant."

Felton, working with Richard O. Musser, the lead author on this paper and Sue M. Hum-Musser, graduate students at University of Arkansas; Herb Eichenseer, University of Arkansas post doctoral fellow now at Pioneer Seed Company, Gary Ervin, postdoctoral fellow now at Mississippi State University; and J. Brad Murphy, professor of horticulture, University of Arkansas; and Michelle Peiffer, research assistant, Penn State, identified glucose oxidase as an active ingredient of caterpillar saliva. Glucose oxidase converts the simple sugar glucose into gluconic acid and hydrogen peroxide.

"While glucose oxidase is produced in many biologic systems and glucose oxidase extracted from fung
'"/>

Contact: A'ndrea Elyse Messer
aem1@psu.edu
814-865-9481
Penn State
10-Apr-2002


Page: 1 2 3

Related biology news :

1. Caterpillars make noise to fend off intruders, researchers discover
2. Caterpillars foiled when tomato plants summon parasitic wasps
3. Oaks Defenses Help Gypsy Moth Caterpillar Fend Off Virus
4. Bone, enamel, dentine, milk & saliva share gene family
5. Bat saliva drug and new MRI techniques offer hope for acute stroke treatment
6. Tick saliva genes key to Lyme disease vaccine
7. UB dental researchers find novel peptide in saliva that kills broad range of fungi and bacteria
8. Component of fly saliva makes promising Leishmaniasis vaccine
9. White tea beats green tea in fighting germs
10. Virus beats food bug
11. Ramoplanin beats antibiotic resistance by fighting the battle on its own terms

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Caterpillar saliva beats plant defenses

(Date:10/30/2014)... North Carolina State University researchers have developed a suite ... between dogs and humans, which has applications in everything ... our pets. , "We,ve developed a platform for computer-mediated ... to new avenues for interpreting dogs, behavioral signals and ... Dr. David Roberts, an assistant professor of computer science ...
(Date:10/29/2014)... by unconventional oil and gas production are well over ... the open access journal Environmental Health . High ... The study is the first to be based on ... and could be used to supplement official air-quality monitoring ... that do not readily flow to the surface. This ...
(Date:10/29/2014)... (October 29, 2014, Beaverton, OR) New research ... 11th International Conference in Houston, TX showed for ... eliminate HPV infection in women using a readily ... The study, presented by Dr. Judith A. Smith, ... Gynecology and Reproductive Sciences at The University of ...
Breaking Biology News(10 mins):New tech aims to improve communication between dogs and humans 2Air quality and unconventional oil and gas sites 2Air quality and unconventional oil and gas sites 3HPV infections in women eradicated by AHCC, Japanese mushroom extract 2
(Date:10/30/2014)... On October 26th at the Mid ... leading applied stem cell research scientist Neil Riordan, ... talks on New Techniques for Enhancing Stem Cell ... Cells. , Dr. Riordan focused on historical medical ... AlphaGEMS that include: wound healing; inflammation and pain ...
(Date:10/30/2014)... Diego, CA (PRWEB) October 30, 2014 ... announced today that they have manually curated public data ... and non profit customers. the data is now ... manually curates and unifies public and internal data sources ... value and knowledge out of the data that becomes ...
(Date:10/30/2014)... Ottawa, Ontario (PRWEB) October 30, 2014 ... the Spartan RX CYP2C19 System . It detects ... a non-invasive cheek swab. , The Spartan RX CYP2C19 ... medicine that has been approved in Canada. Due to ... that it may be used by healthcare professionals such ...
(Date:10/30/2014)... (PRWEB) October 30, 2014 Avure Technologies celebrates ... 525L, the newest member of its fleet of high volume ... reaching an anniversary as we return to PackExpo this year, ... ago in Las Vegas,” said Jeff Williams, CEO at Avure. ... and we’re pleased to be meeting the challenges of market ...
Breaking Biology Technology:Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 2Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 3Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 4Rancho BioSciences Manually Curated TCGA Data Sets Available 2Health Canada approves first near-patient DNA test for personalized medicine 2Health Canada approves first near-patient DNA test for personalized medicine 3In High Demand: New High Pressure Processing (HPP) System with Maximum Throughput Drives Strong Sales 2In High Demand: New High Pressure Processing (HPP) System with Maximum Throughput Drives Strong Sales 3
Cached News: