Navigation Links
Symbiotic bacteria program daily rhythms in squid using light and chemicals
Date:4/1/2013

Glowing bacteria inside squids use light and chemical signals to control circadian-like rhythms in the animals, according to a study to be published on April 2 in mBio, the online open-access journal of the American Society for Microbiology. The Hawaiian bobtail squid, Euprymna scolopes, houses a colony of Vibrio fischeri bacteria in its light organ, using the bacteria at night as an antipredatory camouflage while it ventures out to hunt. The results of the study show that, in addition to acting as a built-in lamp, the bacteria also control when the squid expresses a gene that entrains, or synchronizes, circadian rhythms in animals.

"To our knowledge, this is the first report of bacteria entraining the daily rhythms of host tissues," says corresponding author Margaret McFall-Ngai of the University of Wisconsin - Madison. If bacteria can entrain daily rhythms in an animal, McFall-Ngai says, it's reasonable to think these influences will eventually be found in other animals. It's possible that microbial partners in the human gut, for instance, could similarly influence human daily rhythms through chemical signaling.

Like all animals, squids make proteins that set their inner clock to environmental light. E. scolopes produces two of these "light entrainment" proteins (cryptochromes, or CRYs), and one is regulated in the squid's head, just like every other animal. McFall-Ngai and her co-authors noticed that escry1, the gene that encodes the other protein, is most highly expressed in the light organ, where the squid houses its glowing bacterial symbionts. "The animal uses the luminescence in the evening, so the luminescence is greatest at night. The gene escry1 cycles with the bioluminescence of the animal and not with environmental light," says McFall-Ngai.

But is it the bacterial luminescence that synchronizes the cycling, or is it the bacteria themselves? It's both, says McFall-Ngai.

The bacteria
'/>"/>

Contact: Jim Sliwa
jsliwa@asmusa.org
202-942-9297
American Society for Microbiology
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Genetically modified corn affects its symbiotic relationship with non-target soil organisms
2. Unique adaptations to a symbiotic lifestyle reveal novel targets for aphid insecticides
3. Carnivorous plants rely on the services and wastes of a symbiotic ant for nutrition
4. Bugs need symbiotic bacteria to exploit plant seeds
5. Leading evolutionary scientist to discuss how genome of bacteria has evolved
6. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
7. Team discovers how bacteria resist a Trojan horse antibiotic
8. From scourge to saint: E. coli bacteria becomes a factory - to make cheaper, faster pharmaceuticals
9. Bacterial shock to recapture essential phosphate
10. Disarming disease-causing bacteria
11. Study shows unified process of evolution in bacteria and sexual eukaryotes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/16/2014)... Philadelphia, PA, September 16, 2014 Schizophrenia is associated ... A growing body of research suggests that the relationship ... effort by patients to use nicotine to self-medicate symptoms ... new study, published in the current issue of ... authors found that the level of nicotine receptors in ...
(Date:9/16/2014)... the Exxon Valdez spilled 11 million gallons of oil ... up another giant oil spill in the Gulf of ... the Journal of Consumer Research , news coverage ... instead of catalyzing changes in the way fossil fuels ... media coverage of these two events helped to resolve ...
(Date:9/16/2014)... -- As open enrollment season approaches, U.S. employees will soon ... benefits. According to Aon Hewitt , the global ... plc (NYSE: AON ), employees will ... managing their health care decisions. This increased responsibility makes ... how they can make the most of the programs ...
Breaking Biology News(10 mins):Smoking and schizophrenia linked by alterations in brain nicotine signals 2Exxon Valdez 2014: Does media coverage of manmade disasters contribute to consumer complacency? 2Aon Hewitt Provides Tips to Help Workers Prepare for the Upcoming Open Enrollment Season 2Aon Hewitt Provides Tips to Help Workers Prepare for the Upcoming Open Enrollment Season 3Aon Hewitt Provides Tips to Help Workers Prepare for the Upcoming Open Enrollment Season 4Aon Hewitt Provides Tips to Help Workers Prepare for the Upcoming Open Enrollment Season 5Aon Hewitt Provides Tips to Help Workers Prepare for the Upcoming Open Enrollment Season 6Aon Hewitt Provides Tips to Help Workers Prepare for the Upcoming Open Enrollment Season 7
... "crack baby" hysteria of the 1980s was greatly ... but disabling cognitive impairments -- attention deficits, learning ... study by investigators at the Vanderbilt Kennedy Center ... the long-term behavioral and neurological problems associated with ...
... especially those that are hydrophobic or water-repellant, to tumors ... develop innovative delivery systems that keep these drugs intact ... University at Buffalo’s Institute for Lasers, Photonics and Biophotonics ... solution in which the delivery system is the drug ...
... Researchers have linked a structural protein called nestin to ... new biomarker that could lead to earlier detection and ... of Cancer Research, researchers from Dartmouth Medical School demonstrate ... basal epithelial breast tumors, a highly aggressive cancer with ...
Cached Biology News:Prenatal cocaine's lasting cellular effects 2Prenatal cocaine's lasting cellular effects 3No carrier necessary: This drug delivers itself 2Selective marker found to indicate aggressive form of breast cancer 2
(Date:9/16/2014)... 2014 “Nature has developed, very cleverly, ... we desire in optical design,” said Joseph Shaw, director ... “As we explore surfaces and structures at the nanoscale, ... presented in San Diego in August during a conference ... ” chaired by Shaw and Rongguang Liang of the ...
(Date:9/16/2014)... phones to cars and flashlights, batteries play an ... companies constantly are seeking ways to improve battery ... using a water-based solution, researchers at the University ... efficient nuclear battery that could be used for ... in automobiles and also in complicated applications such ...
(Date:9/16/2014)... September 16, 2014 CIRTEC Medical Systems’ ... Highley as CEO of CIRTEC. , “I am ... for the Company.” noted Brian Highley. “The company has ... sustaining strong organic growth over the past two years. ... continuing to improve and expand the services Cirtec offers ...
(Date:9/16/2014)... , Sept. 16, 2014  LABSCO, the leading ... products to hospitals, physician office laboratories and alternate ... October 1, 2014, it will serve as Siemens ... market segments and as a semi-exclusive sales distributor ... contiguous United States . LABSCO ...
Breaking Biology Technology:Nature’s designs inspire research into new light-based technologies 2Nature’s designs inspire research into new light-based technologies 3Nature’s designs inspire research into new light-based technologies 4Nature’s designs inspire research into new light-based technologies 5LABSCO Secures Alliance With Siemens Healthcare Diagnostics 2LABSCO Secures Alliance With Siemens Healthcare Diagnostics 3
... Raptor Pharmaceuticals Corp. ("Raptor" or the "Company") ... has dosed the first patient in its Phase ... University of California, San Diego ("UCSD"), ... Cysteamine") capsules in nephropathic cystinosis ("cystinosis"), a rare ...
... Interim Primary Endpoint Data from Phase II Study Shows 71% ... Docetaxel - , , - Secondary Endpoint Evaluation Shows ... Cohort - , , ORLANDO, Fla. and TUSTIN, Calif., ... ) today announced that preliminary results from a Phase II ...
... Clinical Oncology , , ORLANDO, Fla., June 1 ... use of ChemoFX(R), a chemosensitivity assay, to predict the ... of individual patients. Results from the study show ... percent were responsive to cetuximab, a result that is ...
Cached Biology Technology:Raptor Pharmaceuticals Doses First Patient in Phase 2b Clinical Trial of DR Cysteamine for Cystinosis 2Raptor Pharmaceuticals Doses First Patient in Phase 2b Clinical Trial of DR Cysteamine for Cystinosis 3Raptor Pharmaceuticals Doses First Patient in Phase 2b Clinical Trial of DR Cysteamine for Cystinosis 4Raptor Pharmaceuticals Doses First Patient in Phase 2b Clinical Trial of DR Cysteamine for Cystinosis 5Peregrine Pharmaceuticals Presents Promising Data From Its Phase II Bavituximab Breast Cancer Trial at 2009 ASCO Annual Meeting 2Peregrine Pharmaceuticals Presents Promising Data From Its Phase II Bavituximab Breast Cancer Trial at 2009 ASCO Annual Meeting 3Peregrine Pharmaceuticals Presents Promising Data From Its Phase II Bavituximab Breast Cancer Trial at 2009 ASCO Annual Meeting 4Peregrine Pharmaceuticals Presents Promising Data From Its Phase II Bavituximab Breast Cancer Trial at 2009 ASCO Annual Meeting 5Peregrine Pharmaceuticals Presents Promising Data From Its Phase II Bavituximab Breast Cancer Trial at 2009 ASCO Annual Meeting 6Laboratory Test May Predict Effectiveness of ERBITUX(R) for Individual Colorectal Cancer Patients 2Laboratory Test May Predict Effectiveness of ERBITUX(R) for Individual Colorectal Cancer Patients 3
... The Neural Stem Cell Expansion Kit - ... in vitro NSC expansion as a monolayer ... specially formulated N-2 Plus Media Supplement, which has ... K.K. et al . (1996) Genes & ...
... RNase-Free DNase is a preparation of ... double-stranded DNA to produce 3-hydroxyl oligonucleotides. ... in applications where maintaining the integrity ... is qualified for use with the ...
... Fragment is a genetically engineered Klenow polymerase in ... been removed, leaving only the 5 to 3 ... Exo- Klenow Fragment the enzyme of choice for ... the random primed method, and for DNA sequencing ...
... RNA polymerase is a DNA-dependent RNA polymerase ... promoters. It efficiently synthesizes in vitro ... down stream from a T7 promoter. ... templates for in vitro translation, substrates in ...
Biology Products: