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:


(Date:5/2/2019)... , ... April 30, 2019 , ... ... LLP is pleased to announce that Gunes Bender, Ph.D., a registered patent ... sciences practice group. In his new role, Bender provides technical support and scientific ...
(Date:4/27/2019)... ... April 26, 2019 , ... Washington State University’s Center for ... than 30 student venture teams, representing nearly 150 students, presented their business ideas ... The top five teams in the College League were awarded prize money with ...
(Date:4/25/2019)... , ... April 24, 2019 , ... ... Services Secretary Alex Azar today, a broad collective of 62 individual scientists, bioethicists, ... American Society of Gene & Cell Therapy (ASGCT), across industry and academia called ...
Breaking Biology News(10 mins):
(Date:5/7/2019)... ... May 06, 2019 , ... "The new Liquid Nitrogen ... repositories being asked to store cellular products being used in adoptive therapy ... are world leaders, who have shared their expertise in building and managing facilities ...
(Date:5/4/2019)... ... 03, 2019 , ... Diopsys Inc, the world leader in ... vision test, a new full field electroretinography (ffERG) protocol designed to detect ... Americans will have glaucoma, with black Americans having the highest prevalence rate. This ...
(Date:5/2/2019)... S.D. (PRWEB) , ... April 30, 2019 , ... The ... from industrial scale macro breweries to local craft breweries, and even home brewing clubs ... very complex chemical and biological processes, that when mastered can produce a superb product. ...
(Date:5/2/2019)... (PRWEB) , ... May 02, 2019 , ... ... genetics testing company, will present results documenting discrepancies between U.S. insurer policies for ... for patients at risk for hereditary breast and ovarian cancer (HBOC). ...
Breaking Biology Technology:
Cached News: