Navigation Links
Insect gut detects unhealthy meal
Date:12/20/2007

Plant leaves and surfaces are teeming with microbial life, yet the insects that feed on plants lack adaptive immune systems to fend off any intruding microorganisms they eat along with their greens. Now research published in the online open access journal, BMC Biology shows how food-borne bacteria affect an insects immune system.

Study authors Dalial Freitak, David Heckel and Heiko Vogel from the Max Planck Institute for Chemical Ecology in Jena, Germany along with Christopher Wheat from the University of Helsinki, Finland, deliberately fed insects with non-infectious microorganisms. The researchers watched to see how the herbivorous insect, the cabbage semilooper Trichoplusia ni (Lepidoptera), detected and responded to a diet laced with nonpathogenic, non-infectious bacteria. In most studies to date, lab reared insects have been injected with bacterial strains, whereas in nature the insects main exposure would be from eating plants.

The larvae were reared on diets with or without an added helping of Escherichia coli and Micrococcus luteus bacteria. In the bacteria-fed larvae, general antibacterial activity was enhanced, although the activity of one key enzyme related to immune response - phenoloxidase - was inhibited. Among the eight proteins highly expressed in the hemolymph of the bacteria-fed larvae were the immune-response-related proteins arylphorin, apolipophorin III and gloverin. Significantly, the pupation time and pupal mass of bacteria-fed larvae was negatively affected by their unhealthy diet.

The authors conclude that even non-pathogenic bacteria in food can trigger an immune response in insects with significant effects. Trichoplusia ni larvae are able to detect and respond to environmental microbes encountered in the diet, possibly even using midgut epithelial tissue as a sensing organ, says Vogel. Although this reaction to microbes comes at a price, it may be offering protection from serious infection. These results show that microbial communities on food plants represent a dynamic and unstudied part of the coevolutionary interactions between plants and their insect herbivores, he adds.


'/>"/>

Contact: Charlotte Webber
press@biomedcentral.com
44-020-763-19980
BioMed Central
Source:Eurekalert

Related biology news :

1. Tropical insects go the distance to inform rainforest conservation
2. Natural insecticide re-created in the lab
3. Japanese beetle may help fight hemlock-killing insect
4. Handbook of small grain insects available now
5. ESA celebrates 100 years of insect science journals
6. Tiny pest-eating insect fights fruit flies
7. New field-deployable biosensor detects avian influenza virus in minutes instead of days
8. Studies: Children obese due to a host of unhealthy pressures
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/9/2016)... Paris Police Prefecture ... solution to ensure the safety of people and operations in ... major tournament Teleste, an international technology group specialised ... today that its video security solution will be utilised by ... public safety across the country. The system roll-out is scheduled ...
(Date:6/2/2016)... , June 2, 2016 ... Manned Platforms, Unmanned Systems, Physical Infrastructure, Support & Other ... provider visiongain offers comprehensive analysis of the ... this market will generate revenues of $17.98 billion in ... acquired DVTEL Inc, a leader in software and hardware ...
(Date:5/12/2016)... WearablesResearch.com , a brand of Troubadour ... from the Q1 wave of its quarterly wearables survey. ... receptivity to a program where they would receive discounts ... company. "We were surprised to see that ... LaColla , CEO of Troubadour Research, "primarily because there ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016 /PRNewswire/ - FACIT has announced ... biotechnology company, Propellon Therapeutics Inc. ("Propellon" ... commercialization of a portfolio of first-in-class WDR5 inhibitors ... such as WDR5 represent an exciting class of ... precision medicine for cancer patients. Substantial advances have ...
(Date:6/23/2016)... YORK , June, 23, 2016  The Biodesign ... to envision new ways to harness living systems and ... Modern Art (MoMA) in New York City ... than 130 participating students, showcased projects at MoMA,s Celeste ... Paola Antonelli , MoMA,s senior curator of architecture ...
(Date:6/23/2016)... , June 23, 2016 Apellis ... Phase 1 clinical trials of its complement C3 ... single and multiple ascending dose studies designed to ... (PD) of subcutaneous injection in healthy adult volunteers. ... (SC) either as a single dose (ranging from ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... and technical consulting, provides a free webinar on Performing Quality Investigations: ... 2016 at 12pm CT at no charge. , Incomplete investigations are still a ...
Breaking Biology Technology: