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Recent News and Articles on the Keywords: microbial life + yet the + insects  Related to the article below (Last Update: 5/13/2008)


Cosmos
Bouncing Solar System killed the dinosaurs
Cosmos, Australia - May 8, 2008
Known as panspermia, the idea is that microbial life can move either from one planet to another within the same Solar System; or even to nearby giant ...
Quiet time with Mom, my thoughts
Modesto Bee, CA - May 11, 2008
First off, I have to say I hate it here in the land of cold, white walls and anti- microbial hand rubs. I'm sure you know what I mean: You've been in here ...

Space.com
What Mars Fossils Might Look Like
Space.com - May 1, 2008
With a pH between 1.5 and 3, Rio Tinto is as sour as vinegar, yet it supports a surprising variety of life. Bacteria, algae, single-celled organisms called ...
Phoenix to Look for Martians
Mexia Daily News, TX - May 7, 2008
As countless science fiction books and movies attest, we have long been fascinated with ideas of life on Mars. Yet early explorations dampened our hopes for ...

Space Daily
The Astrobiology Universe
Space Daily, CA - May 1, 2008
Recent discoveries of microbes living below the surface of Earth have shown that microbial life can grow deep within a planet, protected by layers of rock ...
Sustainable Castles: Affordable Buildings Can Save the Planet
Coastal Post, CA - May 1, 2008
Compost cooks with microbial action up to 160 degrees, killing pathogens and creating fertilizer. The perfect composting system hasn't been built yet. ...
Think. It's not illegal yet.
ScienceBlog.com, CA - Apr 15, 2008
But now, as we discover more about life, specifically of our microbial counterparts and their viruses, we are coming to the realization that Linnaein ...

New York Times
Expressing Our Individuality, the Way E. Coli Do
New York Times, United States - Apr 21, 2008
Others will turn up their microbial noses. These quirks of E. coli?s personality can mean the difference between life and death for the bacteria. ...
The $60000 genome
Australian Life Scientist, Australia - May 5, 2008
It?s not the $1000 genome just yet, but Applied Biosystems says it?s getting there. Sign up for our Australian Life Scientist newsletters! ...
Author : Pew Commission on Industrial Farm Animal Production
Earthtimes (press release), UK - Apr 29, 2008
Other greenhouse gases, primarily nitrous oxide, arise mainly from the microbial degradation of manure. Air quality degradation is also a problem in and ...
Source: Google News

A Molecular View of Microbial Diversity and the Biosphere -
NR Pace - Science, 1997 - sciencemag.org
... organisms occupy a peculiar place in the human view of life. ... Yet, the workings of
the biosphere depend absolutely on the activities of the microbial world (1 ...

Global Dispersal of Free-Living Microbial Eukaryote Species -
BJ Finlay - Science, 2002 - sciencemag.org
... restricted species, such as the insects (Fig ... and "biogeography" curves are not yet
known ... ecosystem" remains within the physicochemical limits of microbial life. ...

[PDF] Life in extreme environments -
LJ Rothschild, RL Mancinelli - Nature, 2001 - azolla.fc.ul.pt
... can increase the optimal temperature for microbial growth, but ... Pressure challenges
life because it forces volume changes ... sea floor at 10,898 m, yet it harbours ...
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NUTRITIONAL INTERACTIONS IN INSECT-MICROBIAL SYMBIOSES: Aphids and Their Symbiotic Bacteria Buchnera -
AE Douglas - Annual Reviews in Entomology, 1998 - Annual Reviews
... insects possessing them live through the life cycle on ... This is in contrast to some
microbial associates of ... although the evidence is, as yet, entirely negative. ...

Life at the oxic-anoxic interface: microbial activities and adaptations -
A Brune, P Frenzel, H Cypionka - FEMS Microbiology Reviews, 2000 - Blackwell Synergy
... The amazing life modes of endosymbiotic sulfur bacteria ... aerobic bacteria that are
not yet understood in ... However, understanding the microbial ecology in the ...

Default taxonomy: Ernst Mayr's view of the microbial world -
CR Woese - Proceedings of the National Academy of Sciences, 1998 - National Acad Sciences
... would never have come into existence, except for microbial life. ... The power and
importance of the microbial world are ... Yet how diverse is it in comparison to the ...

Microbial diversity: the importance of exploration and conservation -
RR Colwell - Journal of Industrial Microbiology and Biotechnology, 1997 - Springer
... Microbes are necessary for life as we know ... Yet, microbiologists fear the possi- bility
of loss ... microbial ecosystems contain novel, as-yet-uncultivated species. ...

The possibility of alternative microbial life on Earth -
CE Cleland, SD Copley - International Journal of Astrobiology, 2006 - Cambridge Univ Press
... independent development of wings in insects, birds and ... Yet, we continue to operate
in the framework of ... tools for probing the invisible world of microbial life. ...

[PDF] Insect defence: its impact on microbial control of insect pests -
K Narayanan - Current Science, 2004 - ias.ac.in
... exploita- tion of insect pathogens for microbial control of ... severely impaired the
ability of the insects to clear ... is an essen- tial element of life; yet as a ...
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Microbial Minimalism Genome Reduction in Bacterial Pathogens -
NA Moran - Cell, 2002 - Elsevier
... Microbial Minimalism Genome Reduction in Bacterial Pathogens. ... often enables pathogenic
life (Goebel and Gross ... Yet the evolutionarily ancient obligate pathogens ...

Source: Google Scholar

Insect gut detects unhealthy meal

 

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 insect’s 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.

###

Notes to Editors

1 Immune system responses and fitness costs associated with consumption of bacteria in larvae of Trichoplusia ni
Dalial Freitak, Christopher W Wheat, David G Heckel and Heiko Vogel
BMC Biology (in press)

During embargo, article available at: http://www.biomedcentral.com/imedia/6499057871438116_article.pdf?random=51626

After the embargo, article available at journal website: http://www.biomedcentral.com/bmcbiol/

Please name the journal in any story you write. If you are writing for the web, please link to the article. All articles are available free of charge, according to BioMed Central’s open access policy.

Article citation and URL available on request at press@biomedcentral.com on the day of publication

Alternative media contact:

Robert Brumfield
Fusion PR
Tel: +001 202 898 200 (ext. 109)
Email: robert.brumfield@fusionpr.com

BMC Biology - the flagship biology journal of the BMC series - publishes research and methodology articles of special importance and broad interest in any area of biology and biomedical sciences. BMC Biology (ISSN 1741-7007) is covered by PubMed, Scopus, CAS, BIOSIS, Zoological Record and Google Scholar. The journal is tracked by Thomson Scientific (ISI) and will receive its first Impact Factor in 2008.

BioMed Central (www.biomedcentral) is an independent online publishing house committed to providing immediate access without charge to the peer-reviewed biological and medical research it publishes. This commitment is based on the view that open access to research is essential to the rapid and efficient communication of science.

 
 
 
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