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:12/7/2016)... According to a new market research report "Emotion Detection and Recognition Market ... Application Area, End User, And Region - Global Forecast to 2021", published by ... 2016 to USD 36.07 Billion by 2021, at a Compound Annual Growth Rate ... ... MarketsandMarkets Logo ...
(Date:12/6/2016)... Dec. 6, 2016  Zimmer Biomet Holdings, Inc. (NYSE and ... an offering of €500.0 million principal amount of its 1.414% ... of its 2.425% senior unsecured notes due 2026. ... on December 13, 2016, subject to the satisfaction of customary closing ... The Company intends to use ...
(Date:12/2/2016)... India , December 1, 2016 ... Authentication type (Fingerprint, Voice), Future Technology (Iris Recognition ... and Region - Global Forecast to 2021", published ... USD 442.7 Million in 2016, and is projected ... at a CAGR of 14.06%.      ...
Breaking Biology News(10 mins):
(Date:12/8/2016)... Dec. 8, 2016  OncoSec Medical Incorporated ("OncoSec") ... DNA-based intratumoral cancer immunotherapies, today announced financial results ... "We are delivering on our commitment to ... ImmunoPulse® IL-12. We are pleased with the early ... trial, and we are focused on advancing our ...
(Date:12/8/2016)...  Biotheranostics today announced that new data will ... Cancer Index (BCI) in identifying which patients with ... for disease recurrence and might benefit from extended ... advancing the understanding of the value of BCI ... inform decisions related to patient treatment. These data ...
(Date:12/8/2016)... UK (PRWEB) , ... December 08, 2016 , ... ... precision light to control cells — optogenetics — is key to exciting advances ... of the art, spatially patterned light projected via free-space optics stimulates small, transparent ...
(Date:12/8/2016)... -- Oxford Gene Technology (OGT), The ... range with the launch of the SureSeq myPanel™ NGS Custom ... in familial hypercholesterolemia (FH). The panel delivers single nucleotide variation ... small panel and allows customisation by ,mix and match, of ... LDLR , P C SK9 , ...
Breaking Biology Technology:
Cached News: